pw-apply: export ADD_TAGS based on replies to cover letter

Patchwork does not automatically propagate tags from cover letter.
With a few simple REST calls we can get all the comments and grep
them for tags.

We export those tags to a env var called ADD_TAGS.

User is expected to add to their applypatch-msg hook something like:

    while IFS= read -r tag; do
	echo -e Adding tag: '\e[35m'$tag'\e[0m'
	git interpret-trailers --in-place \
	    --if-exists=addIfDifferent \
	    --trailer "$tag" \
	    "$1"
    done <<< "$ADD_TAGS"

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

1 files changed, 29 insertions, 1 deletions

diff --git a/pw-apply b/pw-apply
index a1c155e..97a41eb 100755
--- a/pw-apply
+++ b/pw-apply
@@ -9,7 +9,7 @@ usage()
 {
   cat <<-EOF
   usage: pw-apply [-h] [-s SERIES] [-b MBOX] [-m BRANCHNAME] [-M]
-                  [-a] [-3] [-N] [-e]
+                  [-a] [-3] [-N] [-e] [-T]
                   -- [-C] [-a ACKEDBY] [-r REVIEWEDBY] [-t TESTEDBY]
 EOF
   exit
@@ -43,6 +43,29 @@ get_cover()
   cover_msgid=$(echo "$cover_json" | jq -r '.msgid' | tr -d '<>')
 }
 
+set_cover_tags()
+{
+  [ -z "$cover_tags" ] && return
+
+  cover_json=$(echo "$series_json" | jq '.cover_letter')
+  [ "$cover_json" == "null" ] && return
+
+  clink=$(echo "$cover_json" | jq -r '.url')
+  link=$(curl -s "$clink" | jq -r '.comments')
+  [ "$link" == "null" ] && return
+
+  tags=$(echo -e "$(curl -s $link | jq -r '.[].content')" |
+	     sed -n '/\(Ack\|Review\)ed-[Bb]y:/p')
+  export ADD_TAGS="$tags"
+}
+
+clear_cover_tags()
+{
+    [ -z "$cover_tags" ] && return
+
+    [ -n "$ADD_TAGS" ] && export ADD_TAGS=
+}
+
 accept_series()
 {
   for patch in $(git pw series show $1 -f simple 2> /dev/null | \
@@ -77,6 +100,7 @@ accept=""
 merge=""
 mbox=""
 cover=""
+cover_tags="y"
 mb2q_normalize="y"
 head_old=$(git rev-parse --verify HEAD)
 while true; do
@@ -90,6 +114,7 @@ while true; do
     -M | --auto-merge) merge="1"; auto_branch="1"; shift ;;
     -b | --mbox ) mbox="$2"; shift 2 ;;
     -c | --cover) branch="tmp"; cover="$2"; shift 2 ;;
+    -T | --no-cover-tags) cover_tags=""; shift ;;
     -h | --help ) usage; break ;;
     -- ) shift; break ;;
     * )  break ;;
@@ -108,6 +133,7 @@ body=
 author=XYZ
 if [ ! -z "$auto_branch" ]; then
     get_cover
+    set_cover_tags
     [ -z "$cover_msgid" ] && merge=
 fi
 
@@ -192,3 +218,5 @@ if [ ! -z "$merge" ]; then
     git commit --amend
   fi
 fi
+
+clear_cover_tags