pkgs/build-support/fetchbzr/nix-prefetch-bzr

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