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|
#!/bin/sh -e
url=
rev=
expHash=
hashType="${NIX_HASH_ALGO:-sha256}"
# Parse command line arguments
argi=0
argfun=""
for arg; do
if test -z "$argfun"; then
case $arg in
--url) argfun=set_url;;
--rev) argfun=set_rev;;
--hash) argfun=set_expHash;;
--help|-h)
echo "Usage: nix-prefetch-fossil [options] [URL [REVISION [EXPECTED-HASH]]]"
echo ""
echo "Options:"
echo " --url URL Fossil repository URL"
echo " --rev REV Fossil revision/tag/branch (default: trunk)"
echo " --hash HASH Expected hash"
echo " --help Show this help message"
exit 0
;;
*)
argi=$((argi + 1))
case $argi in
1) url=$arg;;
2) rev=$arg;;
3) expHash=$arg;;
*) echo "Too many arguments" >&2; exit 1;;
esac
;;
esac
else
case $argfun in
set_*)
var=${argfun#set_}
eval "$var='$arg'"
;;
esac
argfun=""
fi
done
if test -z "$url"; then
echo "error: URL is required" >&2
echo "Usage: nix-prefetch-fossil [URL [REVISION [EXPECTED-HASH]]]" >&2
exit 1
fi
# Default to trunk if no revision specified
if test -z "$rev"; then
rev="trunk"
fi
# If the hash was given, check if we already have it in store
if test -n "$expHash"; then
finalPath=$(nix-store --print-fixed-path --recursive "$hashType" "$expHash" fossil-archive)
if nix-store --check-validity "$finalPath" 2> /dev/null; then
echo "$expHash"
exit 0
fi
fi
# Create temporary directory for cloning
tmpPath="$(mktemp -d --tmpdir fossil-checkout-tmp-XXXXXXXX)"
cleanup() { rm -rf "$tmpPath"; }
trap cleanup EXIT
# Fossil wants to write global configuration to $HOME/.fossil
# We'll let it write to the temp directory instead
export HOME="$tmpPath"
echo "Fetching Fossil repository $url at revision $rev..." >&2
# Clone the repository
fossil clone -A $(whoami) "$url" "$tmpPath/fossil-clone.fossil" >&2
# Create directory for checkout
checkoutDir="$tmpPath/checkout"
mkdir -p "$checkoutDir"
# Open the repository at the specified revision
cd "$checkoutDir"
fossil open "$tmpPath/fossil-clone.fossil" "$rev" >&2
# Get the actual commit hash and date
checkoutLine=$(fossil info | grep ^checkout:)
# Remove 'checkout:' prefix & remove whitespace
checkoutData=$(echo "$checkoutLine" | sed 's/^checkout:[[:space:]]*//' | tr -s ' ')
# Extract fields: HASH YYYY-MM-DD HH:MM:SS UTC
actualRev=$(echo "$checkoutData" | cut -d' ' -f1)
# Get datetime parts
rawDate=$(echo "$checkoutData" | cut -d' ' -f2)
rawTime=$(echo "$checkoutData" | cut -d' ' -f3)
# Combine into ISO 8601 RFC 3339 format
actualDatetime="${rawDate}T${rawTime}Z"
cd - >/dev/null
# Remove the fossil checkout file
rm -f "$checkoutDir/.fslckout"
# Calculate the hash
hash=$(nix-hash --type "$hashType" --base32 "$checkoutDir")
echo "hash is $hash" >&2
# Add to store if we don't have an expected hash or if it matches
if test -z "$expHash" || test "$expHash" = "$hash"; then
finalPath=$(nix-store --add-fixed --recursive "$hashType" "$checkoutDir")
echo "path is $finalPath" >&2
elif test -n "$expHash" && test "$expHash" != "$hash"; then
echo "error: hash mismatch for Fossil repository $url" >&2
echo " expected: $expHash" >&2
echo " actual: $hash" >&2
exit 1
fi
# Output JSON result
cat <<EOF
{
"url": "$url",
"rev": "$actualRev",
"date": "$actualDatetime",
"path": "$finalPath",
"$hashType": "$hash",
"hash": "$(nix-hash --to-sri --type $hashType $hash)"
}
EOF
|
