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Make `CacheHash.release` return an error 

If a user doesn't care that the manifest failed to be written, they can
simply ignore it. The program will still work; that particular cache
item will simply not be cached.
master
LeRoyce Pearson 2020-04-14 21:51:20 -06:00 committed by Andrew Kelley
parent 967b9825a7
commit e7657f2938
1 changed files with 14 additions and 10 deletions
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24
lib/std/cache_hash.zig
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@ -311,13 +311,17 @@ pub const CacheHash = struct {
try self.manifest_file.?.writeAll(contents.items);
}
pub fn release(self: *@This()) void {
/// Releases the manifest file and frees any memory the CacheHash was using.
/// `CacheHash.hit` must be called first.
///
/// Will also attempt to write to the manifest file if the manifest is dirty.
/// Writing to the manifest file is the only way that this file can return an
/// error.
pub fn release(self: *@This()) !void {
debug.assert(self.manifest_file != null);
if (self.manifest_dirty) {
self.write_manifest() catch |err| {
debug.warn("Unable to write cache file '{}': {}\n", .{ self.b64_digest, err });
};
try self.write_manifest();
}
self.manifest_file.?.close();
@ -366,7 +370,7 @@ test "cache file and then recall it" {
{
var ch = try CacheHash.init(testing.allocator, temp_manifest_dir);
defer ch.release();
defer ch.release() catch unreachable;
ch.add(true);
ch.add(@as(u16, 1234));
@ -380,7 +384,7 @@ test "cache file and then recall it" {
}
{
var ch = try CacheHash.init(testing.allocator, temp_manifest_dir);
defer ch.release();
defer ch.release() catch unreachable;
ch.add(true);
ch.add(@as(u16, 1234));
@ -420,7 +424,7 @@ test "check that changing a file makes cache fail" {
{
var ch = try CacheHash.init(testing.allocator, temp_manifest_dir);
defer ch.release();
defer ch.release() catch unreachable;
ch.add("1234");
try ch.addFile(temp_file);
@ -435,7 +439,7 @@ test "check that changing a file makes cache fail" {
{
var ch = try CacheHash.init(testing.allocator, temp_manifest_dir);
defer ch.release();
defer ch.release() catch unreachable;
ch.add("1234");
try ch.addFile(temp_file);
@ -462,7 +466,7 @@ test "no file inputs" {
{
var ch = try CacheHash.init(testing.allocator, temp_manifest_dir);
defer ch.release();
defer ch.release() catch unreachable;
ch.add("1234");
@ -473,7 +477,7 @@ test "no file inputs" {
}
{
var ch = try CacheHash.init(testing.allocator, temp_manifest_dir);
defer ch.release();
defer ch.release() catch unreachable;
ch.add("1234");