pkgs/build-support/fetchcvs/nix-prefetch-cvs

   1 #! /bin/sh -e
   2
   3 cvsRoot=$1
   4 module=$2
   5 tag=$3
   6 expHash=$4
   7
   8 hashType=$NIX_HASH_ALGO
   9 if test -z "$hashType"; then
  10     hashType=sha256
  11 fi
  12
  13 if test -z "$cvsRoot"; then
  14     echo "syntax: nix-prefetch-cvs CVSROOT MODULE [TAG [HASH]]" >&2
  15     exit 1
  16 elif test -z "$module"; then
  17     echo "syntax: nix-prefetch-cvs CVSROOT MODULE [TAG [HASH]]" >&2
  18     exit 1
  19 fi
  20
  21
  22 mkTempDir() {
  23     # nix>=2.20 rejects adding symlinked paths to the store, so use realpath
  24     # to resolve to a physical path. https://github.com/NixOS/nix/issues/11941
  25     tmpPath="$(realpath "$(mktemp -d --tmpdir nix-prefetch-csv-XXXXXXXX)")"
  26     trap removeTempDir EXIT
  27 }
  28
  29 removeTempDir() {
  30     rm -rf "$tmpPath"
  31 }
  32
  33
  34 # If the hash was given, a file with that hash may already be in the
  35 # store.
  36 if test -n "$expHash"; then
  37     finalPath=$(nix-store --print-fixed-path --recursive "$hashType" "$expHash" cvs-export)
  38     if ! nix-store --check-validity "$finalPath" 2> /dev/null; then
  39         finalPath=
  40     fi
  41     hash=$expHash
  42 fi
  43
  44
  45 # If we don't know the hash or a path with that hash doesn't exist,
  46 # download the file and add it to the store.
  47 if test -z "$finalPath"; then
  48
  49     mkTempDir
  50     tmpFile=$tmpPath/cvs-export
  51     #mkdir $tmpPath
  52
  53     # Perform the checkout.
  54     if test -z "$tag"; then
  55         args=(-D "now")
  56     elif test "$USE_DATE" = "1"; then
  57         args=(-D "$tag")
  58     else
  59         args=(-r "$tag")
  60     fi
  61     (cd "$tmpPath" && cvs -f -z0 -d $cvsRoot export "${args[*]}" -d cvs-export $module >&2)
  62
  63     # Compute the hash.
  64     hash=$(nix-hash --type $hashType ${hashFormat:-"--sri"} $tmpFile)
  65     if ! test -n "$QUIET"; then echo "hash is $hash" >&2; fi
  66
  67     # Add the downloaded file to the Nix store.
  68     finalPath=$(nix-store --add-fixed --recursive "$hashType" $tmpFile)
  69
  70     if test -n "$expHash" -a "$expHash" != "$hash"; then
  71         echo "hash mismatch for CVS root \`$cvsRoot'"
  72         exit 1
  73     fi
  74 fi
  75
  76 if ! test -n "$QUIET"; then echo "path is $finalPath" >&2; fi
  77
  78 echo $hash
  79
  80 if test -n "$PRINT_PATH"; then
  81     echo $finalPath
  82 fi