fetch: support specifying hash on the CLI #21589
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If you use `zig fetch` as a `curl`, you might want to provide it with the expected hash up-front, to skip the download work if the resource is already hash, and to otherwise verify the resource integrity. Example usage: ``` λ /usr/bin/time zig-out/bin/zig fetch https://github.com/tigerbeetle/tigerbeetle/releases/download/0.16.5/tigerbeetle-universal-macos.zip 12209a8b1468572b678c8949f114633b2e25fe08132d19d9edcf6263e081fd550217 3.01 real 1.41 user 0.08 sys matklad@ahab ~/p/zig (master) λ /usr/bin/time zig-out/bin/zig fetch https://github.com/tigerbeetle/tigerbeetle/releases/download/0.16.5/tigerbeetle-universal-macos.zip 12209a8b1468572b678c8949f114633b2e25fe08132d19d9edcf6263e081fd550217 12209a8b1468572b678c8949f114633b2e25fe08132d19d9edcf6263e081fd550217 0.00 real 0.00 user 0.00 sys matklad@ahab ~/p/zig (master) λ /usr/bin/time zig-out/bin/zig fetch https://github.com/tigerbeetle/tigerbeetle/releases/download/0.16.5/tigerbeetle-universal-macos.zip 12209a8b1468572b678c8949f114633b2e25fe08132d19d9edcf6263e081fd550218 error: hash mismatch: manifest declares 12209a8b1468572b678c8949f114633b2e25fe08132d19d9edcf6263e081fd550218 but the fetched package has 12209a8b1468572b678c8949f114633b2e25fe08132d19d9edcf6263e081fd550217 2.39 real 1.39 user 0.09 sys matklad@ahab ~/p/zig (master) [1] λ ```
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If you use
zig fetchas acurl, you might want to provide it with the expected hash up-front, to skip the download work if the resource is already cached, and to otherwise verify the resource integrity.Example usage: