1137 lines
41 KiB
Zig
1137 lines
41 KiB
Zig
const builtin = @import("builtin");
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const std = @import("../std.zig");
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const debug = std.debug;
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const assert = debug.assert;
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const testing = std.testing;
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const mem = std.mem;
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const fmt = std.fmt;
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const Allocator = mem.Allocator;
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const math = std.math;
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const windows = std.os.windows;
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const fs = std.fs;
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const process = std.process;
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pub const sep_windows = '\\';
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pub const sep_posix = '/';
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pub const sep = if (windows.is_the_target) sep_windows else sep_posix;
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pub const sep_str = [1]u8{sep};
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pub const delimiter_windows = ';';
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pub const delimiter_posix = ':';
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pub const delimiter = if (windows.is_the_target) delimiter_windows else delimiter_posix;
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pub fn isSep(byte: u8) bool {
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if (windows.is_the_target) {
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return byte == '/' or byte == '\\';
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} else {
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return byte == '/';
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}
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}
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/// This is different from mem.join in that the separator will not be repeated if
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/// it is found at the end or beginning of a pair of consecutive paths.
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fn joinSep(allocator: *Allocator, separator: u8, paths: []const []const u8) ![]u8 {
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if (paths.len == 0) return (([*]u8)(undefined))[0..0];
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const total_len = blk: {
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var sum: usize = paths[0].len;
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var i: usize = 1;
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while (i < paths.len) : (i += 1) {
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const prev_path = paths[i - 1];
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const this_path = paths[i];
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const prev_sep = (prev_path.len != 0 and prev_path[prev_path.len - 1] == separator);
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const this_sep = (this_path.len != 0 and this_path[0] == separator);
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sum += @boolToInt(!prev_sep and !this_sep);
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sum += if (prev_sep and this_sep) this_path.len - 1 else this_path.len;
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}
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break :blk sum;
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};
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const buf = try allocator.alloc(u8, total_len);
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errdefer allocator.free(buf);
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mem.copy(u8, buf, paths[0]);
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var buf_index: usize = paths[0].len;
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var i: usize = 1;
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while (i < paths.len) : (i += 1) {
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const prev_path = paths[i - 1];
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const this_path = paths[i];
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const prev_sep = (prev_path.len != 0 and prev_path[prev_path.len - 1] == separator);
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const this_sep = (this_path.len != 0 and this_path[0] == separator);
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if (!prev_sep and !this_sep) {
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buf[buf_index] = separator;
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buf_index += 1;
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}
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const adjusted_path = if (prev_sep and this_sep) this_path[1..] else this_path;
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mem.copy(u8, buf[buf_index..], adjusted_path);
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buf_index += adjusted_path.len;
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}
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// No need for shrink since buf is exactly the correct size.
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return buf;
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}
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pub const join = if (windows.is_the_target) joinWindows else joinPosix;
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/// Naively combines a series of paths with the native path seperator.
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/// Allocates memory for the result, which must be freed by the caller.
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pub fn joinWindows(allocator: *Allocator, paths: []const []const u8) ![]u8 {
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return joinSep(allocator, sep_windows, paths);
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}
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/// Naively combines a series of paths with the native path seperator.
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/// Allocates memory for the result, which must be freed by the caller.
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pub fn joinPosix(allocator: *Allocator, paths: []const []const u8) ![]u8 {
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return joinSep(allocator, sep_posix, paths);
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}
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fn testJoinWindows(paths: []const []const u8, expected: []const u8) void {
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var buf: [1024]u8 = undefined;
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const a = &std.heap.FixedBufferAllocator.init(&buf).allocator;
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const actual = joinWindows(a, paths) catch @panic("fail");
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testing.expectEqualSlices(u8, expected, actual);
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}
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fn testJoinPosix(paths: []const []const u8, expected: []const u8) void {
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var buf: [1024]u8 = undefined;
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const a = &std.heap.FixedBufferAllocator.init(&buf).allocator;
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const actual = joinPosix(a, paths) catch @panic("fail");
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testing.expectEqualSlices(u8, expected, actual);
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}
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test "join" {
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testJoinWindows([_][]const u8{ "c:\\a\\b", "c" }, "c:\\a\\b\\c");
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testJoinWindows([_][]const u8{ "c:\\a\\b", "c" }, "c:\\a\\b\\c");
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testJoinWindows([_][]const u8{ "c:\\a\\b\\", "c" }, "c:\\a\\b\\c");
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testJoinWindows([_][]const u8{ "c:\\", "a", "b\\", "c" }, "c:\\a\\b\\c");
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testJoinWindows([_][]const u8{ "c:\\a\\", "b\\", "c" }, "c:\\a\\b\\c");
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testJoinWindows(
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[_][]const u8{ "c:\\home\\andy\\dev\\zig\\build\\lib\\zig\\std", "io.zig" },
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"c:\\home\\andy\\dev\\zig\\build\\lib\\zig\\std\\io.zig",
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);
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testJoinPosix([_][]const u8{ "/a/b", "c" }, "/a/b/c");
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testJoinPosix([_][]const u8{ "/a/b/", "c" }, "/a/b/c");
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testJoinPosix([_][]const u8{ "/", "a", "b/", "c" }, "/a/b/c");
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testJoinPosix([_][]const u8{ "/a/", "b/", "c" }, "/a/b/c");
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testJoinPosix(
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[_][]const u8{ "/home/andy/dev/zig/build/lib/zig/std", "io.zig" },
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"/home/andy/dev/zig/build/lib/zig/std/io.zig",
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);
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testJoinPosix([_][]const u8{ "a", "/c" }, "a/c");
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testJoinPosix([_][]const u8{ "a/", "/c" }, "a/c");
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}
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pub fn isAbsolute(path: []const u8) bool {
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if (windows.is_the_target) {
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return isAbsoluteWindows(path);
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} else {
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return isAbsolutePosix(path);
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}
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}
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pub fn isAbsoluteWindows(path: []const u8) bool {
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if (path[0] == '/')
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return true;
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if (path[0] == '\\') {
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return true;
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}
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if (path.len < 3) {
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return false;
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}
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if (path[1] == ':') {
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if (path[2] == '/')
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return true;
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if (path[2] == '\\')
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return true;
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}
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return false;
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}
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pub fn isAbsolutePosix(path: []const u8) bool {
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return path[0] == sep_posix;
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}
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test "isAbsoluteWindows" {
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testIsAbsoluteWindows("/", true);
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testIsAbsoluteWindows("//", true);
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testIsAbsoluteWindows("//server", true);
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testIsAbsoluteWindows("//server/file", true);
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testIsAbsoluteWindows("\\\\server\\file", true);
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testIsAbsoluteWindows("\\\\server", true);
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testIsAbsoluteWindows("\\\\", true);
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testIsAbsoluteWindows("c", false);
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testIsAbsoluteWindows("c:", false);
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testIsAbsoluteWindows("c:\\", true);
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testIsAbsoluteWindows("c:/", true);
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testIsAbsoluteWindows("c://", true);
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testIsAbsoluteWindows("C:/Users/", true);
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testIsAbsoluteWindows("C:\\Users\\", true);
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testIsAbsoluteWindows("C:cwd/another", false);
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testIsAbsoluteWindows("C:cwd\\another", false);
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testIsAbsoluteWindows("directory/directory", false);
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testIsAbsoluteWindows("directory\\directory", false);
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testIsAbsoluteWindows("/usr/local", true);
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}
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test "isAbsolutePosix" {
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testIsAbsolutePosix("/home/foo", true);
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testIsAbsolutePosix("/home/foo/..", true);
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testIsAbsolutePosix("bar/", false);
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testIsAbsolutePosix("./baz", false);
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}
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fn testIsAbsoluteWindows(path: []const u8, expected_result: bool) void {
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testing.expectEqual(expected_result, isAbsoluteWindows(path));
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}
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fn testIsAbsolutePosix(path: []const u8, expected_result: bool) void {
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testing.expectEqual(expected_result, isAbsolutePosix(path));
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}
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pub const WindowsPath = struct {
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is_abs: bool,
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kind: Kind,
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disk_designator: []const u8,
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pub const Kind = enum {
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None,
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Drive,
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NetworkShare,
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};
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};
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pub fn windowsParsePath(path: []const u8) WindowsPath {
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if (path.len >= 2 and path[1] == ':') {
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return WindowsPath{
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.is_abs = isAbsoluteWindows(path),
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.kind = WindowsPath.Kind.Drive,
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.disk_designator = path[0..2],
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};
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}
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if (path.len >= 1 and (path[0] == '/' or path[0] == '\\') and
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(path.len == 1 or (path[1] != '/' and path[1] != '\\')))
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{
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return WindowsPath{
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.is_abs = true,
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.kind = WindowsPath.Kind.None,
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.disk_designator = path[0..0],
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};
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}
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const relative_path = WindowsPath{
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.kind = WindowsPath.Kind.None,
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.disk_designator = [_]u8{},
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.is_abs = false,
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};
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if (path.len < "//a/b".len) {
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return relative_path;
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}
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// TODO when I combined these together with `inline for` the compiler crashed
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{
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const this_sep = '/';
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const two_sep = [_]u8{ this_sep, this_sep };
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if (mem.startsWith(u8, path, two_sep)) {
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if (path[2] == this_sep) {
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return relative_path;
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}
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var it = mem.tokenize(path, [_]u8{this_sep});
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_ = (it.next() orelse return relative_path);
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_ = (it.next() orelse return relative_path);
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return WindowsPath{
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.is_abs = isAbsoluteWindows(path),
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.kind = WindowsPath.Kind.NetworkShare,
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.disk_designator = path[0..it.index],
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};
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}
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}
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{
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const this_sep = '\\';
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const two_sep = [_]u8{ this_sep, this_sep };
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if (mem.startsWith(u8, path, two_sep)) {
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if (path[2] == this_sep) {
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return relative_path;
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}
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var it = mem.tokenize(path, [_]u8{this_sep});
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_ = (it.next() orelse return relative_path);
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_ = (it.next() orelse return relative_path);
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return WindowsPath{
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.is_abs = isAbsoluteWindows(path),
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.kind = WindowsPath.Kind.NetworkShare,
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.disk_designator = path[0..it.index],
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};
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}
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}
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return relative_path;
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}
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test "windowsParsePath" {
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{
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const parsed = windowsParsePath("//a/b");
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testing.expect(parsed.is_abs);
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testing.expect(parsed.kind == WindowsPath.Kind.NetworkShare);
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testing.expect(mem.eql(u8, parsed.disk_designator, "//a/b"));
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}
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{
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const parsed = windowsParsePath("\\\\a\\b");
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testing.expect(parsed.is_abs);
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testing.expect(parsed.kind == WindowsPath.Kind.NetworkShare);
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testing.expect(mem.eql(u8, parsed.disk_designator, "\\\\a\\b"));
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}
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{
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const parsed = windowsParsePath("\\\\a\\");
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testing.expect(!parsed.is_abs);
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testing.expect(parsed.kind == WindowsPath.Kind.None);
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testing.expect(mem.eql(u8, parsed.disk_designator, ""));
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}
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{
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const parsed = windowsParsePath("/usr/local");
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testing.expect(parsed.is_abs);
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testing.expect(parsed.kind == WindowsPath.Kind.None);
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testing.expect(mem.eql(u8, parsed.disk_designator, ""));
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}
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{
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const parsed = windowsParsePath("c:../");
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testing.expect(!parsed.is_abs);
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testing.expect(parsed.kind == WindowsPath.Kind.Drive);
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testing.expect(mem.eql(u8, parsed.disk_designator, "c:"));
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}
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}
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pub fn diskDesignator(path: []const u8) []const u8 {
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if (windows.is_the_target) {
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return diskDesignatorWindows(path);
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} else {
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return "";
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}
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}
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pub fn diskDesignatorWindows(path: []const u8) []const u8 {
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return windowsParsePath(path).disk_designator;
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}
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fn networkShareServersEql(ns1: []const u8, ns2: []const u8) bool {
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const sep1 = ns1[0];
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const sep2 = ns2[0];
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var it1 = mem.tokenize(ns1, [_]u8{sep1});
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var it2 = mem.tokenize(ns2, [_]u8{sep2});
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// TODO ASCII is wrong, we actually need full unicode support to compare paths.
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return asciiEqlIgnoreCase(it1.next().?, it2.next().?);
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}
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fn compareDiskDesignators(kind: WindowsPath.Kind, p1: []const u8, p2: []const u8) bool {
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switch (kind) {
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WindowsPath.Kind.None => {
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assert(p1.len == 0);
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assert(p2.len == 0);
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return true;
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},
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WindowsPath.Kind.Drive => {
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return asciiUpper(p1[0]) == asciiUpper(p2[0]);
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},
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WindowsPath.Kind.NetworkShare => {
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const sep1 = p1[0];
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const sep2 = p2[0];
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var it1 = mem.tokenize(p1, [_]u8{sep1});
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var it2 = mem.tokenize(p2, [_]u8{sep2});
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// TODO ASCII is wrong, we actually need full unicode support to compare paths.
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return asciiEqlIgnoreCase(it1.next().?, it2.next().?) and asciiEqlIgnoreCase(it1.next().?, it2.next().?);
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},
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}
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}
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fn asciiUpper(byte: u8) u8 {
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return switch (byte) {
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'a'...'z' => 'A' + (byte - 'a'),
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else => byte,
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};
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}
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fn asciiEqlIgnoreCase(s1: []const u8, s2: []const u8) bool {
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if (s1.len != s2.len)
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return false;
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var i: usize = 0;
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while (i < s1.len) : (i += 1) {
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if (asciiUpper(s1[i]) != asciiUpper(s2[i]))
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return false;
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}
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return true;
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}
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/// On Windows, this calls `resolveWindows` and on POSIX it calls `resolvePosix`.
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pub fn resolve(allocator: *Allocator, paths: []const []const u8) ![]u8 {
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if (windows.is_the_target) {
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return resolveWindows(allocator, paths);
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} else {
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return resolvePosix(allocator, paths);
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}
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}
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/// This function is like a series of `cd` statements executed one after another.
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/// It resolves "." and "..".
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/// The result does not have a trailing path separator.
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/// If all paths are relative it uses the current working directory as a starting point.
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/// Each drive has its own current working directory.
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/// Path separators are canonicalized to '\\' and drives are canonicalized to capital letters.
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/// Note: all usage of this function should be audited due to the existence of symlinks.
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/// Without performing actual syscalls, resolving `..` could be incorrect.
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pub fn resolveWindows(allocator: *Allocator, paths: []const []const u8) ![]u8 {
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if (paths.len == 0) {
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assert(windows.is_the_target); // resolveWindows called on non windows can't use getCwd
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return process.getCwdAlloc(allocator);
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}
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// determine which disk designator we will result with, if any
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var result_drive_buf = "_:";
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var result_disk_designator: []const u8 = "";
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var have_drive_kind = WindowsPath.Kind.None;
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var have_abs_path = false;
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var first_index: usize = 0;
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var max_size: usize = 0;
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for (paths) |p, i| {
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const parsed = windowsParsePath(p);
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if (parsed.is_abs) {
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have_abs_path = true;
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first_index = i;
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max_size = result_disk_designator.len;
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}
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switch (parsed.kind) {
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WindowsPath.Kind.Drive => {
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result_drive_buf[0] = asciiUpper(parsed.disk_designator[0]);
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result_disk_designator = result_drive_buf[0..];
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have_drive_kind = WindowsPath.Kind.Drive;
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},
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WindowsPath.Kind.NetworkShare => {
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result_disk_designator = parsed.disk_designator;
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have_drive_kind = WindowsPath.Kind.NetworkShare;
|
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},
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WindowsPath.Kind.None => {},
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}
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max_size += p.len + 1;
|
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}
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|
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// if we will result with a disk designator, loop again to determine
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// which is the last time the disk designator is absolutely specified, if any
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// and count up the max bytes for paths related to this disk designator
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if (have_drive_kind != WindowsPath.Kind.None) {
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have_abs_path = false;
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first_index = 0;
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max_size = result_disk_designator.len;
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var correct_disk_designator = false;
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|
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for (paths) |p, i| {
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const parsed = windowsParsePath(p);
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if (parsed.kind != WindowsPath.Kind.None) {
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if (parsed.kind == have_drive_kind) {
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correct_disk_designator = compareDiskDesignators(have_drive_kind, result_disk_designator, parsed.disk_designator);
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} else {
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continue;
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}
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}
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if (!correct_disk_designator) {
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continue;
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}
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if (parsed.is_abs) {
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first_index = i;
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max_size = result_disk_designator.len;
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have_abs_path = true;
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}
|
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max_size += p.len + 1;
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}
|
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}
|
|
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// Allocate result and fill in the disk designator, calling getCwd if we have to.
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|
var result: []u8 = undefined;
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var result_index: usize = 0;
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|
|
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if (have_abs_path) {
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switch (have_drive_kind) {
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WindowsPath.Kind.Drive => {
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result = try allocator.alloc(u8, max_size);
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mem.copy(u8, result, result_disk_designator);
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result_index += result_disk_designator.len;
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},
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|
WindowsPath.Kind.NetworkShare => {
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result = try allocator.alloc(u8, max_size);
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|
var it = mem.tokenize(paths[first_index], "/\\");
|
|
const server_name = it.next().?;
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|
const other_name = it.next().?;
|
|
|
|
result[result_index] = '\\';
|
|
result_index += 1;
|
|
result[result_index] = '\\';
|
|
result_index += 1;
|
|
mem.copy(u8, result[result_index..], server_name);
|
|
result_index += server_name.len;
|
|
result[result_index] = '\\';
|
|
result_index += 1;
|
|
mem.copy(u8, result[result_index..], other_name);
|
|
result_index += other_name.len;
|
|
|
|
result_disk_designator = result[0..result_index];
|
|
},
|
|
WindowsPath.Kind.None => {
|
|
assert(windows.is_the_target); // resolveWindows called on non windows can't use getCwd
|
|
const cwd = try process.getCwdAlloc(allocator);
|
|
defer allocator.free(cwd);
|
|
const parsed_cwd = windowsParsePath(cwd);
|
|
result = try allocator.alloc(u8, max_size + parsed_cwd.disk_designator.len + 1);
|
|
mem.copy(u8, result, parsed_cwd.disk_designator);
|
|
result_index += parsed_cwd.disk_designator.len;
|
|
result_disk_designator = result[0..parsed_cwd.disk_designator.len];
|
|
if (parsed_cwd.kind == WindowsPath.Kind.Drive) {
|
|
result[0] = asciiUpper(result[0]);
|
|
}
|
|
have_drive_kind = parsed_cwd.kind;
|
|
},
|
|
}
|
|
} else {
|
|
assert(windows.is_the_target); // resolveWindows called on non windows can't use getCwd
|
|
// TODO call get cwd for the result_disk_designator instead of the global one
|
|
const cwd = try process.getCwdAlloc(allocator);
|
|
defer allocator.free(cwd);
|
|
|
|
result = try allocator.alloc(u8, max_size + cwd.len + 1);
|
|
|
|
mem.copy(u8, result, cwd);
|
|
result_index += cwd.len;
|
|
const parsed_cwd = windowsParsePath(result[0..result_index]);
|
|
result_disk_designator = parsed_cwd.disk_designator;
|
|
if (parsed_cwd.kind == WindowsPath.Kind.Drive) {
|
|
result[0] = asciiUpper(result[0]);
|
|
}
|
|
have_drive_kind = parsed_cwd.kind;
|
|
}
|
|
errdefer allocator.free(result);
|
|
|
|
// Now we know the disk designator to use, if any, and what kind it is. And our result
|
|
// is big enough to append all the paths to.
|
|
var correct_disk_designator = true;
|
|
for (paths[first_index..]) |p, i| {
|
|
const parsed = windowsParsePath(p);
|
|
|
|
if (parsed.kind != WindowsPath.Kind.None) {
|
|
if (parsed.kind == have_drive_kind) {
|
|
correct_disk_designator = compareDiskDesignators(have_drive_kind, result_disk_designator, parsed.disk_designator);
|
|
} else {
|
|
continue;
|
|
}
|
|
}
|
|
if (!correct_disk_designator) {
|
|
continue;
|
|
}
|
|
var it = mem.tokenize(p[parsed.disk_designator.len..], "/\\");
|
|
while (it.next()) |component| {
|
|
if (mem.eql(u8, component, ".")) {
|
|
continue;
|
|
} else if (mem.eql(u8, component, "..")) {
|
|
while (true) {
|
|
if (result_index == 0 or result_index == result_disk_designator.len)
|
|
break;
|
|
result_index -= 1;
|
|
if (result[result_index] == '\\' or result[result_index] == '/')
|
|
break;
|
|
}
|
|
} else {
|
|
result[result_index] = sep_windows;
|
|
result_index += 1;
|
|
mem.copy(u8, result[result_index..], component);
|
|
result_index += component.len;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (result_index == result_disk_designator.len) {
|
|
result[result_index] = '\\';
|
|
result_index += 1;
|
|
}
|
|
|
|
return allocator.shrink(result, result_index);
|
|
}
|
|
|
|
/// This function is like a series of `cd` statements executed one after another.
|
|
/// It resolves "." and "..".
|
|
/// The result does not have a trailing path separator.
|
|
/// If all paths are relative it uses the current working directory as a starting point.
|
|
/// Note: all usage of this function should be audited due to the existence of symlinks.
|
|
/// Without performing actual syscalls, resolving `..` could be incorrect.
|
|
pub fn resolvePosix(allocator: *Allocator, paths: []const []const u8) ![]u8 {
|
|
if (paths.len == 0) {
|
|
assert(!windows.is_the_target); // resolvePosix called on windows can't use getCwd
|
|
return process.getCwdAlloc(allocator);
|
|
}
|
|
|
|
var first_index: usize = 0;
|
|
var have_abs = false;
|
|
var max_size: usize = 0;
|
|
for (paths) |p, i| {
|
|
if (isAbsolutePosix(p)) {
|
|
first_index = i;
|
|
have_abs = true;
|
|
max_size = 0;
|
|
}
|
|
max_size += p.len + 1;
|
|
}
|
|
|
|
var result: []u8 = undefined;
|
|
var result_index: usize = 0;
|
|
|
|
if (have_abs) {
|
|
result = try allocator.alloc(u8, max_size);
|
|
} else {
|
|
assert(!windows.is_the_target); // resolvePosix called on windows can't use getCwd
|
|
const cwd = try process.getCwdAlloc(allocator);
|
|
defer allocator.free(cwd);
|
|
result = try allocator.alloc(u8, max_size + cwd.len + 1);
|
|
mem.copy(u8, result, cwd);
|
|
result_index += cwd.len;
|
|
}
|
|
errdefer allocator.free(result);
|
|
|
|
for (paths[first_index..]) |p, i| {
|
|
var it = mem.tokenize(p, "/");
|
|
while (it.next()) |component| {
|
|
if (mem.eql(u8, component, ".")) {
|
|
continue;
|
|
} else if (mem.eql(u8, component, "..")) {
|
|
while (true) {
|
|
if (result_index == 0)
|
|
break;
|
|
result_index -= 1;
|
|
if (result[result_index] == '/')
|
|
break;
|
|
}
|
|
} else {
|
|
result[result_index] = '/';
|
|
result_index += 1;
|
|
mem.copy(u8, result[result_index..], component);
|
|
result_index += component.len;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (result_index == 0) {
|
|
result[0] = '/';
|
|
result_index += 1;
|
|
}
|
|
|
|
return allocator.shrink(result, result_index);
|
|
}
|
|
|
|
test "resolve" {
|
|
const cwd = try process.getCwdAlloc(debug.global_allocator);
|
|
if (windows.is_the_target) {
|
|
if (windowsParsePath(cwd).kind == WindowsPath.Kind.Drive) {
|
|
cwd[0] = asciiUpper(cwd[0]);
|
|
}
|
|
testing.expect(mem.eql(u8, testResolveWindows([_][]const u8{"."}), cwd));
|
|
} else {
|
|
testing.expect(mem.eql(u8, testResolvePosix([_][]const u8{ "a/b/c/", "../../.." }), cwd));
|
|
testing.expect(mem.eql(u8, testResolvePosix([_][]const u8{"."}), cwd));
|
|
}
|
|
}
|
|
|
|
test "resolveWindows" {
|
|
if (windows.is_the_target) {
|
|
const cwd = try process.getCwdAlloc(debug.global_allocator);
|
|
const parsed_cwd = windowsParsePath(cwd);
|
|
{
|
|
const result = testResolveWindows([_][]const u8{ "/usr/local", "lib\\zig\\std\\array_list.zig" });
|
|
const expected = try join(debug.global_allocator, [_][]const u8{
|
|
parsed_cwd.disk_designator,
|
|
"usr\\local\\lib\\zig\\std\\array_list.zig",
|
|
});
|
|
if (parsed_cwd.kind == WindowsPath.Kind.Drive) {
|
|
expected[0] = asciiUpper(parsed_cwd.disk_designator[0]);
|
|
}
|
|
testing.expect(mem.eql(u8, result, expected));
|
|
}
|
|
{
|
|
const result = testResolveWindows([_][]const u8{ "usr/local", "lib\\zig" });
|
|
const expected = try join(debug.global_allocator, [_][]const u8{
|
|
cwd,
|
|
"usr\\local\\lib\\zig",
|
|
});
|
|
if (parsed_cwd.kind == WindowsPath.Kind.Drive) {
|
|
expected[0] = asciiUpper(parsed_cwd.disk_designator[0]);
|
|
}
|
|
testing.expect(mem.eql(u8, result, expected));
|
|
}
|
|
}
|
|
|
|
testing.expect(mem.eql(u8, testResolveWindows([_][]const u8{ "c:\\a\\b\\c", "/hi", "ok" }), "C:\\hi\\ok"));
|
|
testing.expect(mem.eql(u8, testResolveWindows([_][]const u8{ "c:/blah\\blah", "d:/games", "c:../a" }), "C:\\blah\\a"));
|
|
testing.expect(mem.eql(u8, testResolveWindows([_][]const u8{ "c:/blah\\blah", "d:/games", "C:../a" }), "C:\\blah\\a"));
|
|
testing.expect(mem.eql(u8, testResolveWindows([_][]const u8{ "c:/ignore", "d:\\a/b\\c/d", "\\e.exe" }), "D:\\e.exe"));
|
|
testing.expect(mem.eql(u8, testResolveWindows([_][]const u8{ "c:/ignore", "c:/some/file" }), "C:\\some\\file"));
|
|
testing.expect(mem.eql(u8, testResolveWindows([_][]const u8{ "d:/ignore", "d:some/dir//" }), "D:\\ignore\\some\\dir"));
|
|
testing.expect(mem.eql(u8, testResolveWindows([_][]const u8{ "//server/share", "..", "relative\\" }), "\\\\server\\share\\relative"));
|
|
testing.expect(mem.eql(u8, testResolveWindows([_][]const u8{ "c:/", "//" }), "C:\\"));
|
|
testing.expect(mem.eql(u8, testResolveWindows([_][]const u8{ "c:/", "//dir" }), "C:\\dir"));
|
|
testing.expect(mem.eql(u8, testResolveWindows([_][]const u8{ "c:/", "//server/share" }), "\\\\server\\share\\"));
|
|
testing.expect(mem.eql(u8, testResolveWindows([_][]const u8{ "c:/", "//server//share" }), "\\\\server\\share\\"));
|
|
testing.expect(mem.eql(u8, testResolveWindows([_][]const u8{ "c:/", "///some//dir" }), "C:\\some\\dir"));
|
|
testing.expect(mem.eql(u8, testResolveWindows([_][]const u8{ "C:\\foo\\tmp.3\\", "..\\tmp.3\\cycles\\root.js" }), "C:\\foo\\tmp.3\\cycles\\root.js"));
|
|
}
|
|
|
|
test "resolvePosix" {
|
|
testing.expect(mem.eql(u8, testResolvePosix([_][]const u8{ "/a/b", "c" }), "/a/b/c"));
|
|
testing.expect(mem.eql(u8, testResolvePosix([_][]const u8{ "/a/b", "c", "//d", "e///" }), "/d/e"));
|
|
testing.expect(mem.eql(u8, testResolvePosix([_][]const u8{ "/a/b/c", "..", "../" }), "/a"));
|
|
testing.expect(mem.eql(u8, testResolvePosix([_][]const u8{ "/", "..", ".." }), "/"));
|
|
testing.expect(mem.eql(u8, testResolvePosix([_][]const u8{"/a/b/c/"}), "/a/b/c"));
|
|
|
|
testing.expect(mem.eql(u8, testResolvePosix([_][]const u8{ "/var/lib", "../", "file/" }), "/var/file"));
|
|
testing.expect(mem.eql(u8, testResolvePosix([_][]const u8{ "/var/lib", "/../", "file/" }), "/file"));
|
|
testing.expect(mem.eql(u8, testResolvePosix([_][]const u8{ "/some/dir", ".", "/absolute/" }), "/absolute"));
|
|
testing.expect(mem.eql(u8, testResolvePosix([_][]const u8{ "/foo/tmp.3/", "../tmp.3/cycles/root.js" }), "/foo/tmp.3/cycles/root.js"));
|
|
}
|
|
|
|
fn testResolveWindows(paths: []const []const u8) []u8 {
|
|
return resolveWindows(debug.global_allocator, paths) catch unreachable;
|
|
}
|
|
|
|
fn testResolvePosix(paths: []const []const u8) []u8 {
|
|
return resolvePosix(debug.global_allocator, paths) catch unreachable;
|
|
}
|
|
|
|
/// If the path is a file in the current directory (no directory component)
|
|
/// then returns null
|
|
pub fn dirname(path: []const u8) ?[]const u8 {
|
|
if (windows.is_the_target) {
|
|
return dirnameWindows(path);
|
|
} else {
|
|
return dirnamePosix(path);
|
|
}
|
|
}
|
|
|
|
pub fn dirnameWindows(path: []const u8) ?[]const u8 {
|
|
if (path.len == 0)
|
|
return null;
|
|
|
|
const root_slice = diskDesignatorWindows(path);
|
|
if (path.len == root_slice.len)
|
|
return path;
|
|
|
|
const have_root_slash = path.len > root_slice.len and (path[root_slice.len] == '/' or path[root_slice.len] == '\\');
|
|
|
|
var end_index: usize = path.len - 1;
|
|
|
|
while ((path[end_index] == '/' or path[end_index] == '\\') and end_index > root_slice.len) {
|
|
if (end_index == 0)
|
|
return null;
|
|
end_index -= 1;
|
|
}
|
|
|
|
while (path[end_index] != '/' and path[end_index] != '\\' and end_index > root_slice.len) {
|
|
if (end_index == 0)
|
|
return null;
|
|
end_index -= 1;
|
|
}
|
|
|
|
if (have_root_slash and end_index == root_slice.len) {
|
|
end_index += 1;
|
|
}
|
|
|
|
if (end_index == 0)
|
|
return null;
|
|
|
|
return path[0..end_index];
|
|
}
|
|
|
|
pub fn dirnamePosix(path: []const u8) ?[]const u8 {
|
|
if (path.len == 0)
|
|
return null;
|
|
|
|
var end_index: usize = path.len - 1;
|
|
while (path[end_index] == '/') {
|
|
if (end_index == 0)
|
|
return path[0..1];
|
|
end_index -= 1;
|
|
}
|
|
|
|
while (path[end_index] != '/') {
|
|
if (end_index == 0)
|
|
return null;
|
|
end_index -= 1;
|
|
}
|
|
|
|
if (end_index == 0 and path[end_index] == '/')
|
|
return path[0..1];
|
|
|
|
if (end_index == 0)
|
|
return null;
|
|
|
|
return path[0..end_index];
|
|
}
|
|
|
|
test "dirnamePosix" {
|
|
testDirnamePosix("/a/b/c", "/a/b");
|
|
testDirnamePosix("/a/b/c///", "/a/b");
|
|
testDirnamePosix("/a", "/");
|
|
testDirnamePosix("/", "/");
|
|
testDirnamePosix("////", "/");
|
|
testDirnamePosix("", null);
|
|
testDirnamePosix("a", null);
|
|
testDirnamePosix("a/", null);
|
|
testDirnamePosix("a//", null);
|
|
}
|
|
|
|
test "dirnameWindows" {
|
|
testDirnameWindows("c:\\", "c:\\");
|
|
testDirnameWindows("c:\\foo", "c:\\");
|
|
testDirnameWindows("c:\\foo\\", "c:\\");
|
|
testDirnameWindows("c:\\foo\\bar", "c:\\foo");
|
|
testDirnameWindows("c:\\foo\\bar\\", "c:\\foo");
|
|
testDirnameWindows("c:\\foo\\bar\\baz", "c:\\foo\\bar");
|
|
testDirnameWindows("\\", "\\");
|
|
testDirnameWindows("\\foo", "\\");
|
|
testDirnameWindows("\\foo\\", "\\");
|
|
testDirnameWindows("\\foo\\bar", "\\foo");
|
|
testDirnameWindows("\\foo\\bar\\", "\\foo");
|
|
testDirnameWindows("\\foo\\bar\\baz", "\\foo\\bar");
|
|
testDirnameWindows("c:", "c:");
|
|
testDirnameWindows("c:foo", "c:");
|
|
testDirnameWindows("c:foo\\", "c:");
|
|
testDirnameWindows("c:foo\\bar", "c:foo");
|
|
testDirnameWindows("c:foo\\bar\\", "c:foo");
|
|
testDirnameWindows("c:foo\\bar\\baz", "c:foo\\bar");
|
|
testDirnameWindows("file:stream", null);
|
|
testDirnameWindows("dir\\file:stream", "dir");
|
|
testDirnameWindows("\\\\unc\\share", "\\\\unc\\share");
|
|
testDirnameWindows("\\\\unc\\share\\foo", "\\\\unc\\share\\");
|
|
testDirnameWindows("\\\\unc\\share\\foo\\", "\\\\unc\\share\\");
|
|
testDirnameWindows("\\\\unc\\share\\foo\\bar", "\\\\unc\\share\\foo");
|
|
testDirnameWindows("\\\\unc\\share\\foo\\bar\\", "\\\\unc\\share\\foo");
|
|
testDirnameWindows("\\\\unc\\share\\foo\\bar\\baz", "\\\\unc\\share\\foo\\bar");
|
|
testDirnameWindows("/a/b/", "/a");
|
|
testDirnameWindows("/a/b", "/a");
|
|
testDirnameWindows("/a", "/");
|
|
testDirnameWindows("", null);
|
|
testDirnameWindows("/", "/");
|
|
testDirnameWindows("////", "/");
|
|
testDirnameWindows("foo", null);
|
|
}
|
|
|
|
fn testDirnamePosix(input: []const u8, expected_output: ?[]const u8) void {
|
|
if (dirnamePosix(input)) |output| {
|
|
testing.expect(mem.eql(u8, output, expected_output.?));
|
|
} else {
|
|
testing.expect(expected_output == null);
|
|
}
|
|
}
|
|
|
|
fn testDirnameWindows(input: []const u8, expected_output: ?[]const u8) void {
|
|
if (dirnameWindows(input)) |output| {
|
|
testing.expect(mem.eql(u8, output, expected_output.?));
|
|
} else {
|
|
testing.expect(expected_output == null);
|
|
}
|
|
}
|
|
|
|
pub fn basename(path: []const u8) []const u8 {
|
|
if (windows.is_the_target) {
|
|
return basenameWindows(path);
|
|
} else {
|
|
return basenamePosix(path);
|
|
}
|
|
}
|
|
|
|
pub fn basenamePosix(path: []const u8) []const u8 {
|
|
if (path.len == 0)
|
|
return [_]u8{};
|
|
|
|
var end_index: usize = path.len - 1;
|
|
while (path[end_index] == '/') {
|
|
if (end_index == 0)
|
|
return [_]u8{};
|
|
end_index -= 1;
|
|
}
|
|
var start_index: usize = end_index;
|
|
end_index += 1;
|
|
while (path[start_index] != '/') {
|
|
if (start_index == 0)
|
|
return path[0..end_index];
|
|
start_index -= 1;
|
|
}
|
|
|
|
return path[start_index + 1 .. end_index];
|
|
}
|
|
|
|
pub fn basenameWindows(path: []const u8) []const u8 {
|
|
if (path.len == 0)
|
|
return [_]u8{};
|
|
|
|
var end_index: usize = path.len - 1;
|
|
while (true) {
|
|
const byte = path[end_index];
|
|
if (byte == '/' or byte == '\\') {
|
|
if (end_index == 0)
|
|
return [_]u8{};
|
|
end_index -= 1;
|
|
continue;
|
|
}
|
|
if (byte == ':' and end_index == 1) {
|
|
return [_]u8{};
|
|
}
|
|
break;
|
|
}
|
|
|
|
var start_index: usize = end_index;
|
|
end_index += 1;
|
|
while (path[start_index] != '/' and path[start_index] != '\\' and
|
|
!(path[start_index] == ':' and start_index == 1))
|
|
{
|
|
if (start_index == 0)
|
|
return path[0..end_index];
|
|
start_index -= 1;
|
|
}
|
|
|
|
return path[start_index + 1 .. end_index];
|
|
}
|
|
|
|
test "basename" {
|
|
testBasename("", "");
|
|
testBasename("/", "");
|
|
testBasename("/dir/basename.ext", "basename.ext");
|
|
testBasename("/basename.ext", "basename.ext");
|
|
testBasename("basename.ext", "basename.ext");
|
|
testBasename("basename.ext/", "basename.ext");
|
|
testBasename("basename.ext//", "basename.ext");
|
|
testBasename("/aaa/bbb", "bbb");
|
|
testBasename("/aaa/", "aaa");
|
|
testBasename("/aaa/b", "b");
|
|
testBasename("/a/b", "b");
|
|
testBasename("//a", "a");
|
|
|
|
testBasenamePosix("\\dir\\basename.ext", "\\dir\\basename.ext");
|
|
testBasenamePosix("\\basename.ext", "\\basename.ext");
|
|
testBasenamePosix("basename.ext", "basename.ext");
|
|
testBasenamePosix("basename.ext\\", "basename.ext\\");
|
|
testBasenamePosix("basename.ext\\\\", "basename.ext\\\\");
|
|
testBasenamePosix("foo", "foo");
|
|
|
|
testBasenameWindows("\\dir\\basename.ext", "basename.ext");
|
|
testBasenameWindows("\\basename.ext", "basename.ext");
|
|
testBasenameWindows("basename.ext", "basename.ext");
|
|
testBasenameWindows("basename.ext\\", "basename.ext");
|
|
testBasenameWindows("basename.ext\\\\", "basename.ext");
|
|
testBasenameWindows("foo", "foo");
|
|
testBasenameWindows("C:", "");
|
|
testBasenameWindows("C:.", ".");
|
|
testBasenameWindows("C:\\", "");
|
|
testBasenameWindows("C:\\dir\\base.ext", "base.ext");
|
|
testBasenameWindows("C:\\basename.ext", "basename.ext");
|
|
testBasenameWindows("C:basename.ext", "basename.ext");
|
|
testBasenameWindows("C:basename.ext\\", "basename.ext");
|
|
testBasenameWindows("C:basename.ext\\\\", "basename.ext");
|
|
testBasenameWindows("C:foo", "foo");
|
|
testBasenameWindows("file:stream", "file:stream");
|
|
}
|
|
|
|
fn testBasename(input: []const u8, expected_output: []const u8) void {
|
|
testing.expectEqualSlices(u8, expected_output, basename(input));
|
|
}
|
|
|
|
fn testBasenamePosix(input: []const u8, expected_output: []const u8) void {
|
|
testing.expectEqualSlices(u8, expected_output, basenamePosix(input));
|
|
}
|
|
|
|
fn testBasenameWindows(input: []const u8, expected_output: []const u8) void {
|
|
testing.expectEqualSlices(u8, expected_output, basenameWindows(input));
|
|
}
|
|
|
|
/// Returns the relative path from `from` to `to`. If `from` and `to` each
|
|
/// resolve to the same path (after calling `resolve` on each), a zero-length
|
|
/// string is returned.
|
|
/// On Windows this canonicalizes the drive to a capital letter and paths to `\\`.
|
|
pub fn relative(allocator: *Allocator, from: []const u8, to: []const u8) ![]u8 {
|
|
if (windows.is_the_target) {
|
|
return relativeWindows(allocator, from, to);
|
|
} else {
|
|
return relativePosix(allocator, from, to);
|
|
}
|
|
}
|
|
|
|
pub fn relativeWindows(allocator: *Allocator, from: []const u8, to: []const u8) ![]u8 {
|
|
const resolved_from = try resolveWindows(allocator, [_][]const u8{from});
|
|
defer allocator.free(resolved_from);
|
|
|
|
var clean_up_resolved_to = true;
|
|
const resolved_to = try resolveWindows(allocator, [_][]const u8{to});
|
|
defer if (clean_up_resolved_to) allocator.free(resolved_to);
|
|
|
|
const parsed_from = windowsParsePath(resolved_from);
|
|
const parsed_to = windowsParsePath(resolved_to);
|
|
const result_is_to = x: {
|
|
if (parsed_from.kind != parsed_to.kind) {
|
|
break :x true;
|
|
} else switch (parsed_from.kind) {
|
|
WindowsPath.Kind.NetworkShare => {
|
|
break :x !networkShareServersEql(parsed_to.disk_designator, parsed_from.disk_designator);
|
|
},
|
|
WindowsPath.Kind.Drive => {
|
|
break :x asciiUpper(parsed_from.disk_designator[0]) != asciiUpper(parsed_to.disk_designator[0]);
|
|
},
|
|
else => unreachable,
|
|
}
|
|
};
|
|
|
|
if (result_is_to) {
|
|
clean_up_resolved_to = false;
|
|
return resolved_to;
|
|
}
|
|
|
|
var from_it = mem.tokenize(resolved_from, "/\\");
|
|
var to_it = mem.tokenize(resolved_to, "/\\");
|
|
while (true) {
|
|
const from_component = from_it.next() orelse return mem.dupe(allocator, u8, to_it.rest());
|
|
const to_rest = to_it.rest();
|
|
if (to_it.next()) |to_component| {
|
|
// TODO ASCII is wrong, we actually need full unicode support to compare paths.
|
|
if (asciiEqlIgnoreCase(from_component, to_component))
|
|
continue;
|
|
}
|
|
var up_count: usize = 1;
|
|
while (from_it.next()) |_| {
|
|
up_count += 1;
|
|
}
|
|
const up_index_end = up_count * "..\\".len;
|
|
const result = try allocator.alloc(u8, up_index_end + to_rest.len);
|
|
errdefer allocator.free(result);
|
|
|
|
var result_index: usize = 0;
|
|
while (result_index < up_index_end) {
|
|
result[result_index] = '.';
|
|
result_index += 1;
|
|
result[result_index] = '.';
|
|
result_index += 1;
|
|
result[result_index] = '\\';
|
|
result_index += 1;
|
|
}
|
|
// shave off the trailing slash
|
|
result_index -= 1;
|
|
|
|
var rest_it = mem.tokenize(to_rest, "/\\");
|
|
while (rest_it.next()) |to_component| {
|
|
result[result_index] = '\\';
|
|
result_index += 1;
|
|
mem.copy(u8, result[result_index..], to_component);
|
|
result_index += to_component.len;
|
|
}
|
|
|
|
return result[0..result_index];
|
|
}
|
|
|
|
return [_]u8{};
|
|
}
|
|
|
|
pub fn relativePosix(allocator: *Allocator, from: []const u8, to: []const u8) ![]u8 {
|
|
const resolved_from = try resolvePosix(allocator, [_][]const u8{from});
|
|
defer allocator.free(resolved_from);
|
|
|
|
const resolved_to = try resolvePosix(allocator, [_][]const u8{to});
|
|
defer allocator.free(resolved_to);
|
|
|
|
var from_it = mem.tokenize(resolved_from, "/");
|
|
var to_it = mem.tokenize(resolved_to, "/");
|
|
while (true) {
|
|
const from_component = from_it.next() orelse return mem.dupe(allocator, u8, to_it.rest());
|
|
const to_rest = to_it.rest();
|
|
if (to_it.next()) |to_component| {
|
|
if (mem.eql(u8, from_component, to_component))
|
|
continue;
|
|
}
|
|
var up_count: usize = 1;
|
|
while (from_it.next()) |_| {
|
|
up_count += 1;
|
|
}
|
|
const up_index_end = up_count * "../".len;
|
|
const result = try allocator.alloc(u8, up_index_end + to_rest.len);
|
|
errdefer allocator.free(result);
|
|
|
|
var result_index: usize = 0;
|
|
while (result_index < up_index_end) {
|
|
result[result_index] = '.';
|
|
result_index += 1;
|
|
result[result_index] = '.';
|
|
result_index += 1;
|
|
result[result_index] = '/';
|
|
result_index += 1;
|
|
}
|
|
if (to_rest.len == 0) {
|
|
// shave off the trailing slash
|
|
return result[0 .. result_index - 1];
|
|
}
|
|
|
|
mem.copy(u8, result[result_index..], to_rest);
|
|
return result;
|
|
}
|
|
|
|
return [_]u8{};
|
|
}
|
|
|
|
test "relative" {
|
|
testRelativeWindows("c:/blah\\blah", "d:/games", "D:\\games");
|
|
testRelativeWindows("c:/aaaa/bbbb", "c:/aaaa", "..");
|
|
testRelativeWindows("c:/aaaa/bbbb", "c:/cccc", "..\\..\\cccc");
|
|
testRelativeWindows("c:/aaaa/bbbb", "c:/aaaa/bbbb", "");
|
|
testRelativeWindows("c:/aaaa/bbbb", "c:/aaaa/cccc", "..\\cccc");
|
|
testRelativeWindows("c:/aaaa/", "c:/aaaa/cccc", "cccc");
|
|
testRelativeWindows("c:/", "c:\\aaaa\\bbbb", "aaaa\\bbbb");
|
|
testRelativeWindows("c:/aaaa/bbbb", "d:\\", "D:\\");
|
|
testRelativeWindows("c:/AaAa/bbbb", "c:/aaaa/bbbb", "");
|
|
testRelativeWindows("c:/aaaaa/", "c:/aaaa/cccc", "..\\aaaa\\cccc");
|
|
testRelativeWindows("C:\\foo\\bar\\baz\\quux", "C:\\", "..\\..\\..\\..");
|
|
testRelativeWindows("C:\\foo\\test", "C:\\foo\\test\\bar\\package.json", "bar\\package.json");
|
|
testRelativeWindows("C:\\foo\\bar\\baz-quux", "C:\\foo\\bar\\baz", "..\\baz");
|
|
testRelativeWindows("C:\\foo\\bar\\baz", "C:\\foo\\bar\\baz-quux", "..\\baz-quux");
|
|
testRelativeWindows("\\\\foo\\bar", "\\\\foo\\bar\\baz", "baz");
|
|
testRelativeWindows("\\\\foo\\bar\\baz", "\\\\foo\\bar", "..");
|
|
testRelativeWindows("\\\\foo\\bar\\baz-quux", "\\\\foo\\bar\\baz", "..\\baz");
|
|
testRelativeWindows("\\\\foo\\bar\\baz", "\\\\foo\\bar\\baz-quux", "..\\baz-quux");
|
|
testRelativeWindows("C:\\baz-quux", "C:\\baz", "..\\baz");
|
|
testRelativeWindows("C:\\baz", "C:\\baz-quux", "..\\baz-quux");
|
|
testRelativeWindows("\\\\foo\\baz-quux", "\\\\foo\\baz", "..\\baz");
|
|
testRelativeWindows("\\\\foo\\baz", "\\\\foo\\baz-quux", "..\\baz-quux");
|
|
testRelativeWindows("C:\\baz", "\\\\foo\\bar\\baz", "\\\\foo\\bar\\baz");
|
|
testRelativeWindows("\\\\foo\\bar\\baz", "C:\\baz", "C:\\baz");
|
|
|
|
testRelativePosix("/var/lib", "/var", "..");
|
|
testRelativePosix("/var/lib", "/bin", "../../bin");
|
|
testRelativePosix("/var/lib", "/var/lib", "");
|
|
testRelativePosix("/var/lib", "/var/apache", "../apache");
|
|
testRelativePosix("/var/", "/var/lib", "lib");
|
|
testRelativePosix("/", "/var/lib", "var/lib");
|
|
testRelativePosix("/foo/test", "/foo/test/bar/package.json", "bar/package.json");
|
|
testRelativePosix("/Users/a/web/b/test/mails", "/Users/a/web/b", "../..");
|
|
testRelativePosix("/foo/bar/baz-quux", "/foo/bar/baz", "../baz");
|
|
testRelativePosix("/foo/bar/baz", "/foo/bar/baz-quux", "../baz-quux");
|
|
testRelativePosix("/baz-quux", "/baz", "../baz");
|
|
testRelativePosix("/baz", "/baz-quux", "../baz-quux");
|
|
}
|
|
|
|
fn testRelativePosix(from: []const u8, to: []const u8, expected_output: []const u8) void {
|
|
const result = relativePosix(debug.global_allocator, from, to) catch unreachable;
|
|
testing.expectEqualSlices(u8, expected_output, result);
|
|
}
|
|
|
|
fn testRelativeWindows(from: []const u8, to: []const u8, expected_output: []const u8) void {
|
|
const result = relativeWindows(debug.global_allocator, from, to) catch unreachable;
|
|
testing.expectEqualSlices(u8, expected_output, result);
|
|
}
|