tjh.dev
nixpkgs mirror (for testing)
github.com/NixOS/nixpkgs
nix
1#! /bin/sh -e
2
3url=$1
4rev=$2
5expHash=$3
6
7hashType=$NIX_HASH_ALGO
8if test -z "$hashType"; then
9 hashType=sha256
10fi
11if test -z "$hashFormat"; then
12 hashFormat=--sri
13fi
14
15if test -z "$url"; then
16 echo "syntax: nix-prefetch-bzr URL [REVISION [EXPECTED-HASH]]" >&2
17 exit 1
18fi
19
20revarg="-r $rev"
21test -n "$rev" || revarg=""
22
23repoName=$(echo $url | sed '
24 s,.*/\([^/]\+\)/trunk/*$,\1,;t
25 s,.*/\([^/]\+\)/branches/\([^/]\+\)/*$,\1-\2,;t
26 s,.*/\([^/]\+\)/tags/\([^/]\+\)/*$,\1-\2,;t
27 s,.*/\([^/]\+\)/*$,\1,;t
28')
29dstFile="bzr-export"
30
31# If the hash was given, a file with that hash may already be in the
32# store.
33if test -n "$expHash"; then
34 finalPath=$(nix-store --print-fixed-path --recursive "$hashType" "$expHash" $dstFile)
35 if ! nix-store --check-validity "$finalPath" 2> /dev/null; then
36 finalPath=
37 fi
38 hash=$expHash
39fi
40
41
42# If we don't know the hash or a path with that hash doesn't exist,
43# download the file and add it to the store.
44if test -z "$finalPath"; then
45 # nix>=2.20 rejects adding symlinked paths to the store, so use realpath
46 # to resolve to a physical path. https://github.com/NixOS/nix/issues/11941
47 tmpPath="$(realpath "$(mktemp -d --tmpdir bzr-checkout-tmp-XXXXXXXX)")"
48 trap "rm -rf \"$tmpPath\"" EXIT
49
50 tmpFile="$tmpPath/$dstFile"
51
52 # Perform the checkout.
53 bzr -Ossl.cert_reqs=none export $revarg --format=dir "$tmpFile" "$url"
54
55 echo "bzr revision is $(bzr revno $revarg "$url")"
56
57 # Compute the hash.
58 hash=$(nix-hash --type $hashType $hashFormat $tmpFile)
59 if ! test -n "$QUIET"; then echo "hash is $hash" >&2; fi
60
61 # Add the downloaded file to the Nix store.
62 finalPath=$(nix-store --add-fixed --recursive "$hashType" $tmpFile)
63
64 if test -n "$expHash" -a "$expHash" != "$hash"; then
65 echo "hash mismatch for URL \`$url'"
66 exit 1
67 fi
68fi
69
70if ! test -n "$QUIET"; then echo "path is $finalPath" >&2; fi
71
72echo $hash
73
74if test -n "$PRINT_PATH"; then
75 echo $finalPath
76fi