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#!/bin/sh
attr=$1
: ${NIXPKGS=/etc/nixos/nixpkgs}
tmp=$(mktemp --tmpdir -d nixpkgs-dep-license.XXXXXX)
exitHandler() {
exitCode=$?
rm -rf "$tmp"
exit $exitCode
}
trap "exitHandler" EXIT
# fetch the trace and the drvPath of the attribute.
nix-instantiate $NIXPKGS -A $attr --show-trace > "$tmp/drvPath" 2> "$tmp/trace" || {
cat 1>&2 - "$tmp/trace" <<EOF
An error occurred while evaluating $attr.
EOF
exit 1
}
# generate a sed script based on the trace output.
sed '
\,@:.*:@, {
# \1 *.drv file
# \2 License terms
s,.*@:drv:\(.*\):\(.*\):@.*,s!\1!\1: \2!; t;,
s!Str(\\\"\([^,]*\)\\\",\[\])!\1!g
b
}
d
' "$tmp/trace" > "$tmp/filter.sed"
if test $(wc -l "$tmp/filter.sed" | sed 's/ .*//') == 0; then
echo 1>&2 "
No derivation mentionned in the stack trace. Either your derivation does
not use stdenv.mkDerivation or you forgot to use the stdenv adapter named
traceDrvLicenses.
- defaultStdenv = allStdenvs.stdenv;
+ defaultStdenv = traceDrvLicenses allStdenvs.stdenv;
"
exit 1
fi
# remove all dependencies which are using stdenv.mkDerivation
echo '
d
' >> "$tmp/filter.sed"
nix-store -q --tree $(cat "$tmp/drvPath") | sed -f "$tmp/filter.sed"
exit 0;