maintainers/scripts/dep-licenses.sh

   1 #!/bin/sh
   2
   3 attr=$1
   4
   5 : ${NIXPKGS=/etc/nixos/nixpkgs}
   6
   7 tmp=$(mktemp --tmpdir -d nixpkgs-dep-license.XXXXXX)
   8
   9 exitHandler() {
  10     exitCode=$?
  11     rm -rf "$tmp"
  12     return $exitCode
  13 }
  14
  15 trap "exitHandler" EXIT
  16
  17 # fetch the trace and the drvPath of the attribute.
  18 nix-instantiate $NIXPKGS -A $attr --show-trace > "$tmp/drvPath" 2> "$tmp/trace" || {
  19   cat 1>&2 - "$tmp/trace" <<EOF
  20 An error occurred while evaluating $attr.
  21 EOF
  22   exit 1
  23 }
  24
  25 # generate a sed script based on the trace output.
  26 sed '
  27   \,@:.*:@, {
  28     # \1  *.drv file
  29     # \2  License terms
  30     s,.*@:drv:\(.*\):\(.*\):@.*,s!\1!\1: \2!; t;,
  31     s!Str(\\\"\([^,]*\)\\\",\[\])!\1!g
  32     b
  33   }
  34   d
  35 ' "$tmp/trace" > "$tmp/filter.sed"
  36
  37 if test $(wc -l "$tmp/filter.sed" | sed 's/ .*//') == 0; then
  38   echo 1>&2 "
  39 No derivation mentionned in the stack trace.  Either your derivation does
  40 not use stdenv.mkDerivation or you forgot to use the stdenv adapter named
  41 traceDrvLicenses.
  42
  43 -  defaultStdenv = allStdenvs.stdenv;
  44 +  defaultStdenv = traceDrvLicenses allStdenvs.stdenv;
  45 "
  46   exit 1
  47 fi
  48
  49
  50 # remove all dependencies which are using stdenv.mkDerivation
  51 echo '
  52 d
  53 ' >> "$tmp/filter.sed"
  54
  55 nix-store -q --tree $(cat "$tmp/drvPath") | sed -f "$tmp/filter.sed"
  56
  57 exit 0;