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fix: Handle symlinks and FIFOs in nix hash where possible

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Fixes https://github.com/NixOS/nix/issues/11756
Fixes https://github.com/NixOS/nix/issues/11681
This commit is contained in:
Robert Hensing 2024-12-13 17:21:56 +01:00 • committed by Mic92
parent 69853c067c
commit 36563c69a4
3 changed files with 45 additions and 4 deletions
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24
tests/functional/hash-path.sh
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@ -92,3 +92,27 @@ try2 md5 "20f3ffe011d4cfa7d72bfabef7882836"
rm "$TEST_ROOT/hash-path/hello"
ln -s x "$TEST_ROOT/hash-path/hello"
try2 md5 "f78b733a68f5edbdf9413899339eaa4a"
# Flat mode supports process substitution
h=$(nix hash path --mode flat --type sha256 --base32 <(printf "SMASH THE STATE"))
[[ 0d9n3r2i4m1zgy0wpqbsyabsfzgs952066bfp8gwvcg4mkr4r5g8 == "$h" ]]
# Flat mode supports process substitution (hash file)
h=$(nix hash file --type sha256 --base32 <(printf "SMASH THE STATE"))
[[ 0d9n3r2i4m1zgy0wpqbsyabsfzgs952066bfp8gwvcg4mkr4r5g8 == "$h" ]]
# Symlinks in the ancestry are ok and don't affect the result
mkdir -p "$TEST_ROOT/simple" "$TEST_ROOT/try/to/mess/with/it"
echo hi > "$TEST_ROOT/simple/hi"
ln -s "$TEST_ROOT/simple" "$TEST_ROOT/try/to/mess/with/it/simple-link"
h=$(nix hash path --type sha256 --base32 "$TEST_ROOT/simple/hi")
[[ 1xmr8jicvzszfzpz46g37mlpvbzjl2wpwvl2b05psipssyp1sm8h == "$h" ]]
h=$(nix hash path --type sha256 --base32 "$TEST_ROOT/try/to/mess/with/it/simple-link/hi")
[[ 1xmr8jicvzszfzpz46g37mlpvbzjl2wpwvl2b05psipssyp1sm8h == "$h" ]]
# nix hash --mode nar does not canonicalize a symlink argument.
# Otherwise it can't generate a NAR whose root is a symlink.
# If you want to follow the symlink, pass $(realpath -s ...) instead.
ln -s /non-existent-48cujwe8ndf4as0bne "$TEST_ROOT/symlink-to-nowhere"
h=$(nix hash path --mode nar --type sha256 --base32 "$TEST_ROOT/symlink-to-nowhere")
[[ 1bl5ry3x1fcbwgr5c2x50bn572iixh4j1p6ax5isxly2ddgn8pbp == "$h" ]] # manually verified hash