Screenshot diff in pull request

.github/workflows/Android-CI.yml

@@ -60,6 +60,8 @@ jobs:
             MPChartExample/build/outputs/connected_android_test_additional_output/debugAndroidTest/connected
             MPChartExample/build/outputs/androidTest-results/connected
       - name: Compare screenshots
+        env:
+          CLASSIC_TOKEN: ${{ secrets.CLASSIC_TOKEN }}
         run: |
           ls -ls MPChartExample/build/outputs/connected_android_test_additional_output/debugAndroidTest/connected
           cp MPChartExample/build/outputs/connected_android_test_additional_output/debugAndroidTest/connected/emulator\(AVD\)\ -\ 9/* screenshotsToCompare

screenShotCompare.sh

@@ -1,9 +1,54 @@
+#!/bin/zsh
+
 diffFiles=./screenshotDiffs
 mkdir $diffFiles
 #cp MPChartExample/build/outputs/connected_android_test_additional_output/debugAndroidTest/connected/emulator\(AVD\)\ -\ 9/* screenshotsToCompare
 set -x
 ./git-diff-image/install.sh
 GIT_DIFF_IMAGE_OUTPUT_DIR=$diffFiles git diff-image
 
+source scripts/lib.sh
+
+PR=$(echo "$GITHUB_REF_NAME" | sed "s/\// /" | awk '{print $1}')
+echo pr=$PR
+brew install jq
+
+# delete all old comments, starting with "Screenshot differs:"
+oldComments=$(curl_gh -X GET https://api.github.com/repos/"$GITHUB_REPOSITORY"/issues/"$PR"/comments | jq '.[] | (.id |tostring) + "|" + (.user.login | test("github-actions") | tostring) + "|" + (.body | test("Screenshot differs:.*") | tostring)' | grep "true|true" | tr -d "\"" | cut -f1 -d"|")
+echo "comments=$comments"
+echo "$oldComments" | while read comment; do
+  echo "delete comment=$comment"
+  curl_gh -X DELETE https://api.github.com/repos/"$GITHUB_REPOSITORY"/issues/comments/"$comment"
+done
+
+pushd $diffFiles
+body=""
+COUNTER=0
+ls -la
+
+# ignore an error, when no files where found https://unix.stackexchange.com/a/723909/201876
+setopt no_nomatch
+for f in *.png; do
+  if [[ ${f} == "*.png" ]]
+  then
+    echo "nothing found"
+  else
+    (( COUNTER++ ))
+
+    newName="$1-${f}"
+    mv "${f}" "$newName"
+    echo "==> Uploaded screenshot $newName"
+    curl -i -F "file=@$newName" https://www.mxtracks.info/github
+    echo "==> Add screenshot comment $PR"
+    body="$body ${f}![screenshot](https://www.mxtracks.info/github/uploads/$newName) <br/><br/>"
+  fi
+done
+
+if [ ! "$body" == "" ]; then
+  curl_gh -X POST https://api.github.com/repos/"$GITHUB_REPOSITORY"/issues/$PR/comments -d "{ \"body\" : \"Screenshot differs: $COUNTER <br/><br/> $body \" }"
+fi
+
+popd 1>/dev/null
+
 # set error when diffs are there
 [ "$(ls -A $diffFiles)" ] && exit 1 || exit 0

scripts/lib.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+## This file is intended to be sourced by other scripts
+
+function err() {
+  echo >&2 "$@"
+}
+
+function curl_gh() {
+  if [[ -n "$CLASSIC_TOKEN" ]]; then
+    curl \
+      --silent \
+      --header "Authorization: token $CLASSIC_TOKEN" \
+      "$@"
+  else
+    err "WARNING: No CLASSIC_TOKEN found. Skipping API call"
+  fi
+}