deploy release tag (#2919)

.travis.yml

@@ -7,12 +7,18 @@ script:
   - npm run eslint
   - npm run abaplint
 deploy:
-  provider: script
-  script: ./ci/deploy-merged-build.sh
-  skip_cleanup: true
-  on:
-    branch: master
-    tags: false
+  - provider: script
+    script: ./ci/deploy-merged-build.sh
+    skip_cleanup: true
+    on:
+      branch: master
+      tags: false
+  - provider: script
+    script: ./ci/deploy-release-tag.sh
+    skip_cleanup: true
+    on:
+      branch: master
+      tags: false
 env:
   global:
     secure: "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"

ci/deploy-release-tag.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+echo "Detecting version change ..."
+
+VERSION_FILE=src/zif_abapgit_version.intf.abap
+VERSION_CONSTANT=gc_abap_version
+
+git diff-tree --no-commit-id --name-only -r HEAD | grep $VERSION_FILE > /dev/null 2>&1
+if [ $? -ne 0 ]; then
+    echo "no version change detected, skipping tag creation"
+    exit 0
+fi
+
+VERSION_DIFF=$(git diff HEAD^:$VERSION_FILE HEAD:$VERSION_FILE)
+
+echo "$VERSION_DIFF" | grep $VERSION_CONSTANT > /dev/null 2>&1
+if [ $? -ne 0 ]; then
+    echo "no version change detected, skipping tag creation"
+    exit 0
+fi
+
+VERSION_BEFORE=$(echo "$VERSION_DIFF" | grep "^-.\+\b$VERSION_CONSTANT\b" | grep -E -o "[0-9]+\.[0-9]+\.[0-9]+")
+VERSION_AFTER=$(echo "$VERSION_DIFF" | grep "^+.\+\b$VERSION_CONSTANT\b" | grep -E -o "[0-9]+\.[0-9]+\.[0-9]+")
+
+if [ -z $VERSION_BEFORE ] || [ -z $VERSION_AFTER ]; then
+    echo "unexpected version parsing error"
+    echo "$VERSION_DIFF" | grep $VERSION_CONSTANT
+    exit 1
+fi
+
+if [ $VERSION_BEFORE = $VERSION_AFTER ]; then
+    echo "no version change detected, skipping tag creation"
+    exit 0
+fi
+
+TAG="v$VERSION_AFTER"
+echo "version change detected [$VERSION_BEFORE > $VERSION_AFTER], creating a new tag ..."
+
+# DEPLOY
+
+git config user.email "builds@travis-ci.com"
+git config user.name "Travis CI"
+
+REPO_URL=$(git remote -v | grep -m1 '^origin' | sed -Ene 's#.*(https://[^[:space:]]+).*#\1#p')
+PUSH_URL=$(echo "$REPO_URL" | sed -Ene "s#(https://)#\1$GITHUB_API_KEY@#p")
+# e.g. https://$GITHUB_API_KEY@github.com/larshp/abapGit.git
+
+git tag $TAG || exit 1
+git push $PUSH_URL $TAG || exit 1