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