license.sh

#!/bin/bash
# A hacky bash script that scans Go vendor dirs for licenses.
# License checking could probably be improved...

CODEDIRS=$(find vendor -name "*.go" | xargs dirname | sort | uniq)
LICENSEDIRS=$(find vendor -name LICENSE | xargs dirname)

# echo -e "CODE DIRS *********************\n"
# echo -n "$CODEDIRS"
# echo -e "\n\nLICENSE DIRS *********************\n"
# echo -n "$LICENSEDIRS"

echo -e "\n\nCHECKING THAT ALL CODE IS LICENSED..."

for D in $LICENSEDIRS; do
  CODEDIRS=$(echo "$CODEDIRS" | grep -v "$D")
done

echo -e "\n\nREMAINING DIRS *********************\n"
echo -n "$CODEDIRS"

if [ $(echo -n "$CODEDIRS" | wc -l) -ne 0 ]; then
  echo -e "\n\n!!! DIRECTORIES NOT COVERED BY A LICENSE WERE FOUND !!!" 
  exit -1
fi

echo -e "\n\nCHECKING THAT LICENSES ARE OK..."

for D in $LICENSEDIRS; do
  if [ $(cat $D/LICENSE | grep -i "GNU GENERAL PUBLIC" | wc -l) -ne 0 ]; then
    echo "$D/LICENSE appears to be GPL..."
    exit -1
  fi
  if [ $(cat $D/LICENSE | grep -i "Affero" | wc -l) -ne 0 ]; then
    echo "$D/LICENSE appears to be AGPL..."
    exit -1
  fi

  APPROVED=0
  # APACHE V2
  if [ $(cat $D/LICENSE | grep -i "http://www.apache.org/licenses/LICENSE-2.0" | wc -l) -ne 0 ]; then APPROVED=1; fi
  # BSD
  if [ $(cat $D/LICENSE | grep -i "* Redistributions of source code must retain the above copyright" | wc -l) -ne 0 ]; then APPROVED=1; fi
  # MIT
  if [ $(cat $D/LICENSE | grep -i "THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR" | wc -l) -ne 0 ]; then APPROVED=1; fi

  if [ $APPROVED -ne 1 ]; then
    echo "$D/LICENSE does not match as approved"
    exit -1
  fi
done

echo -e "\n\nGENERATING LICENSE FILE..."

OUTFILE=license/third_party.go
mkdir -p $(dirname $OUTFILE)
echo "package license" > $OUTFILE
echo "// ThirdPartyLicenses generated from vendor by scripts/license.sh" >> $OUTFILE
echo -n "var ThirdPartyLicenses = map[string]string{" >> $OUTFILE

for D in $LICENSEDIRS; do
  echo -n -e "\n\`${D#vendor/}\`: \`" >> $OUTFILE
  cat $D/LICENSE >> $OUTFILE
  echo -n "\`," >> $OUTFILE
done
echo "}" >> $OUTFILE

go fmt $OUTFILE