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Pass --ignore-zeros to tar when decompressing zstd-compressed tarballs #2768

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Merged
merged 2 commits into from
Feb 18, 2025
Merged

Pass --ignore-zeros to tar when decompressing zstd-compressed tarballs #2768

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Pass `--ignore-zeros` to `tar` when decompressing `zstd`-compressed t…
smowton Feb 17, 2025
c4158ff
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github-actions[bot] Feb 17, 2025
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Pass --ignore-zeros to tar when decompressing zstd-compressed t… 
…arballs

See comment in the diff for full explanation.
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@smowton
smowton authored Feb 17, 2025
commit 2be5f244ff6e154bcc83ea0cc001272b579c9299
11 changes: 10 additions & 1 deletion src/tar.ts
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Expand Up @@ -168,7 +168,16 @@ export async function extractTarZst(

try {
// Initialize args
const args = ["-x", "--zstd"];
//
// `--ignore-zeros` means that trailing zero bytes at the end of an archive will be read
// by `tar` in case a further concatenated archive follows. Otherwise when a tarball built
// by GNU tar, which writes many trailing zeroes, is read by BSD tar, which expects less, then
// BSD tar can hang up the pipe to its filter program early, and if that program is `zstd`
// then it will try to write the remaining zeroes, get an EPIPE error because `tar` has closed
// its end of the pipe, return 1, and `tar` will pass the error along.
//
// See also https://github.com/facebook/zstd/issues/4294
const args = ["-x", "--zstd", "--ignore-zeros"];

if (tarVersion.type === "gnu") {
// Suppress warnings when using GNU tar to extract archives created by BSD tar
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