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nixpkgs/pkgs/build-support/fetchbzr/nix-prefetch-bzr
Michael Ashton 8c63762d64 - fetchbzr and nix-prefetch-bzr now only export, instead of cloning
- The option for cloning in nix-prefetch-bzr is removed
- ssl certificates are now ignored by fetchbzr

This means that no .bzr directory is downloaded.  Without this change, the
hash of the result is unpredictable, probably because of timestamping in the
.bzr directory.

Currently, the only package using fetchbzr is kicad.
2013-03-31 19:16:18 -07:00

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#! /bin/sh -e
url=$1
rev=$2
expHash=$3
hashType=$NIX_HASH_ALGO
if test -z "$hashType"; then
hashType=sha256
fi
if test -z "$hashFormat"; then
hashFormat=--base32
fi
if test -z "$url"; then
echo "syntax: nix-prefetch-bzr URL [REVISION [EXPECTED-HASH]]" >&2
exit 1
fi
revarg="-r $rev"
test -n "$rev" || revarg=""
repoName=$(echo $url | sed '
s,.*/\([^/]\+\)/trunk/*$,\1,;t
s,.*/\([^/]\+\)/branches/\([^/]\+\)/*$,\1-\2,;t
s,.*/\([^/]\+\)/tags/\([^/]\+\)/*$,\1-\2,;t
s,.*/\([^/]\+\)/*$,\1,;t
')
dstFile=$repoName-r$rev
test -n "$rev" || dstFile=$repoName
# If the hash was given, a file with that hash may already be in the
# store.
if test -n "$expHash"; then
finalPath=$(nix-store --print-fixed-path --recursive "$hashType" "$expHash" $dstFile)
if ! nix-store --check-validity "$finalPath" 2> /dev/null; then
finalPath=
fi
hash=$expHash
fi
# If we don't know the hash or a path with that hash doesn't exist,
# download the file and add it to the store.
if test -z "$finalPath"; then
tmpPath=/tmp/bzr-checkout-tmp-$$
tmpFile=$tmpPath/$dstFile
mkdir $tmpPath
trap "rm -rf $tmpPath" EXIT
# Perform the checkout.
bzr -Ossl.cert_reqs=none export $revarg --format=dir "$tmpFile" "$url"
# Compute the hash.
hash=$(nix-hash --type $hashType $hashFormat $tmpFile)
if ! test -n "$QUIET"; then echo "hash is $hash" >&2; fi
# Add the downloaded file to the Nix store.
finalPath=$(nix-store --add-fixed --recursive "$hashType" $tmpFile)
if test -n "$expHash" -a "$expHash" != "$hash"; then
echo "hash mismatch for URL \`$url'"
exit 1
fi
fi
if ! test -n "$QUIET"; then echo "path is $finalPath" >&2; fi
echo $hash
if test -n "$PRINT_PATH"; then
echo $finalPath
fi