libtiff: use latest release from GitLab

Author: triplef

phases/43-libtiff.bat

@@ -2,8 +2,13 @@
 setlocal
 
 set PROJECT=libtiff
-set REPO=https://gitlab.com/libtiff/libtiff.git
-set TAG=v4.5.0
+set GITLAB_REPO=libtiff/libtiff
+
+:: get the latest release tag from GitLab
+cd %~dp0
+for /f "usebackq delims=" %%i in (`call %BASH% '../scripts/get-latest-gitlab-release-tag.sh %GITLAB_REPO%'`) do (
+  set TAG=%%i
+)
 
 :: load environment and prepare project
 call "%~dp0\..\scripts\common.bat" prepare_project || exit /b 1

scripts/common.bat

@@ -16,6 +16,8 @@ exit /b %errorlevel%
   if not defined REPO (
     if defined GITHUB_REPO (
       set REPO=https://github.com/%GITHUB_REPO%.git
+    ) else if defined GITLAB_REPO (
+      set REPO=https://gitlab.com/%GITLAB_REPO%.git
     ) else (
       echo Missing REPO && exit /b 1
     )

scripts/get-latest-gitlab-release-tag.sh

@@ -0,0 +1,57 @@
+#!/bin/sh
+#
+# Gets the latest tag of the form "vX.Y[.Z]" from a given GitLab repository.
+#
+
+GITLAB_REPO=$1
+TAG_PREFIX=$2
+
+if [ -z "$GITLAB_REPO" ]; then
+  echo "Usage: $0 <GitLab namespace>/<GitLab repository>"
+  exit 1
+fi
+
+# use GitLab token authentication on CI to prevent rate limit errors
+if [ -n "$GITLAB_TOKEN" ]; then
+  GITLAB_AUTHORIZATION_HEADER="PRIVATE-TOKEN: $GITLAB_TOKEN"
+fi
+
+GITLAB_API_URL=${GITLAB_API_URL:-https://gitlab.com/api/v4}
+GITLAB_PROJECT=`printf %s "$GITLAB_REPO" | sed 's|/|%2F|g'`
+
+# try releases first (preferred), then fall back to tags
+# per_page=100 is required for some repositories with a lot of tags
+
+gitlab_releases=`curl \
+  --silent --show-error --fail-with-body \
+  --header "$GITLAB_AUTHORIZATION_HEADER" \
+  "$GITLAB_API_URL/projects/$GITLAB_PROJECT/releases?per_page=100"`
+
+if [ $? -eq 0 ]; then
+  latest_tag=`echo "$gitlab_releases" \
+    | grep '"tag_name":' \
+    | sed -E 's/.*"([^"]+)".*/\1/' \
+    | egrep "^${TAG_PREFIX:-[a-z_-]+}[0-9]+[\._-][0-9]+([\._-][0-9]+)?$" \
+    | head -n 1`
+  if [ -n "$latest_tag" ]; then
+    echo "$latest_tag"
+    exit 0
+  fi
+else
+  echo "$gitlab_releases" >&2
+fi
+
+gitlab_tags=`curl \
+  --silent --show-error --fail-with-body \
+  --header "$GITLAB_AUTHORIZATION_HEADER" \
+  "$GITLAB_API_URL/projects/$GITLAB_PROJECT/repository/tags?per_page=100"`
+
+if [ $? -eq 0 ]; then
+  echo "$gitlab_tags" \
+    | grep '"name":' \
+    | sed -E 's/.*"([^"]+)".*/\1/' \
+    | egrep "^${TAG_PREFIX:-[a-z_-]+}[0-9]+[\._-][0-9]+([\._-][0-9]+)?$" \
+    | head -n 1
+else
+  echo "$gitlab_tags" >&2
+fi