build: add a script to find previous release version tag

scripts/apps-version-check.sh

@@ -1,7 +1,11 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-latest_release=$(git describe --abbrev=0 --tags --exclude '*rc*' --exclude '*alpha*' --exclude '*beta*' --exclude '*docker*')
+# ensure dir
+cd -P -- "$(dirname -- "${BASH_SOURCE[0]}")/.."
+
+# match any official release tag 'e*' and 'v*'
+latest_release="$(env PREV_TAG_MATCH_PATTERN='*' ./scripts/find-prev-rel-tag.sh)"
 echo "Version check compare base: $latest_release"
 
 bad_app_count=0

scripts/find-prev-rel-tag.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [ -z "${PREV_TAG_MATCH_PATTERN:-}" ]; then
+    PROFILE="${PROFILE:-${1:-}}"
+    case "$PROFILE" in
+        emqx-enterprise*)
+            PREV_TAG_MATCH_PATTERN='e*'
+            ;;
+        emqx*)
+            PREV_TAG_MATCH_PATTERN='v*'
+            ;;
+        *)
+            echo "Unknown profile '$PROFILE'"
+            echo "Usage: $0 PROFILE"
+            exit 1
+            ;;
+    esac
+fi
+
+git describe --abbrev=0 --tags --match "${PREV_TAG_MATCH_PATTERN}" --exclude '*rc*' --exclude '*alpha*' --exclude '*beta*' --exclude '*docker*'

scripts/rel/cut.sh

@@ -236,11 +236,7 @@ fi
 generate_changelog () {
     local from_tag="${PREV_TAG:-}"
     if [[ -z $from_tag ]]; then
-        if [ $PROFILE == "emqx" ]; then
+        from_tag="$(./scripts/find-prev-rel-tag.sh "$PROFILE")"
-            from_tag="$(git describe --tags --abbrev=0 --match 'v*')"
-        else
-            from_tag="$(git describe --tags --abbrev=0 --match 'e*')"
-        fi
     fi
     ./scripts/rel/format-changelog.sh -b "${from_tag}" -l 'en' -v "$TAG" > "changes/${TAG}.en.md"
     ./scripts/rel/format-changelog.sh -b "${from_tag}" -l 'zh' -v "$TAG" > "changes/${TAG}.zh.md"

scripts/update-appup.sh

@@ -40,7 +40,7 @@ esac
 ##  e4.3.11
 ##  rel-v4.4.3
 ##  rel-e4.4.3
-PREV_TAG="${PREV_TAG:-$(git describe --tag --abbrev=0 --match "[${TAG_PREFIX}|rel-]*" --exclude '*rc*' --exclude '*alpha*' --exclude '*beta*')}"
+PREV_TAG="${PREV_TAG:-$(env PREV_TAG_MATCH_PATTERN="[${TAG_PREFIX}|rel-]*" ./scripts/find-prev-rel-tag.sh)}"
 
 shift 1
 # bash 3.2 treat empty array as unbound, so we can't use 'ESCRIPT_ARGS=()' here,