pkgs/build-support/fetchsvn/nix-prefetch-svn

   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=--base32
  13 fi
  14
  15 if test -z "$url"; then
  16     echo "syntax: nix-prefetch-svn URL [REVISION [EXPECTED-HASH]]" >&2
  17     exit 1
  18 fi
  19
  20 test -n "$rev" || rev="HEAD"
  21
  22 repoName=$(echo $url | sed '
  23   s,.*/\([^/]\+\)/trunk/*$,\1,;t
  24   s,.*/\([^/]\+\)/branches/\([^/]\+\)/*$,\1-\2,;t
  25   s,.*/\([^/]\+\)/tags/\([^/]\+\)/*$,\1-\2,;t
  26   s,.*/\([^/]\+\)/*$,\1,;t
  27 ')
  28 dstFile=$repoName-r$rev
  29
  30 # If the hash was given, a file with that hash may already be in the
  31 # store.
  32 if test -n "$expHash"; then
  33     finalPath=$(nix-store --print-fixed-path --recursive "$hashType" "$expHash" $dstFile)
  34     if ! nix-store --check-validity "$finalPath" 2> /dev/null; then
  35         finalPath=
  36     fi
  37     hash=$expHash
  38 fi
  39
  40
  41 # If we don't know the hash or a path with that hash doesn't exist,
  42 # download the file and add it to the store.
  43 if test -z "$finalPath"; then
  44     # nix>=2.20 rejects adding symlinked paths to the store, so use realpath
  45     # to resolve to a physical path. https://github.com/NixOS/nix/issues/11941
  46     tmpPath="$(realpath "$(mktemp -d --tmpdir svn-checkout-tmp-XXXXXXXX)")"
  47     trap "rm -rf \"$tmpPath\"" EXIT
  48
  49     tmpFile="$tmpPath/$dstFile"
  50
  51     # Perform the checkout.
  52     if test "$NIX_PREFETCH_SVN_LEAVE_DOT_SVN" != 1
  53     then
  54         command="export"
  55     else
  56         command="checkout"
  57     fi
  58
  59     echo p | svn "$command" --quiet -r "$rev" "$url" "$tmpFile" >&2
  60     echo "svn revision is $(svn info -r "$rev" "$url" | grep "Revision: " | cut -d' ' -f2)"
  61
  62     # Compute the hash.
  63     hash=$(nix-hash --type $hashType $hashFormat $tmpFile)
  64     if ! test -n "$QUIET"; then echo "hash is $hash" >&2; fi
  65
  66     # Add the downloaded file to the Nix store.
  67     finalPath=$(nix-store --add-fixed --recursive "$hashType" $tmpFile)
  68
  69     if test -n "$expHash" -a "$expHash" != "$hash"; then
  70         echo "hash mismatch for URL \`$url'"
  71         exit 1
  72     fi
  73 fi
  74
  75 if ! test -n "$QUIET"; then echo "path is $finalPath" >&2; fi
  76
  77 echo $hash
  78
  79 if test -n "$PRINT_PATH"; then
  80     echo $finalPath
  81 fi