Set GIT_BRANCH as an env variable for Sphinx docs (#1092)

* Set GIT_BRANCH as an env variable

* Echo output

Author: geographika

.github/workflows/build.yml

@@ -18,9 +18,10 @@ jobs:
           python-version: 3.13
 
       - name: Build docs
+        env:
+          GIT_BRANCH: ${{ github.ref_name }}
         run: |
           pip install -r requirements.txt
-          echo "GIT_BRANCH=$(echo $GITHUB_REF | cut -d '/' -f 3)" >> $GITHUB_ENV
           ./scripts/ci_build_docs.sh
 
       # Deploy release branch to mapserver.github.io

Makefile

@@ -19,7 +19,7 @@ BUILD_LANGUAGES = $(TRANSLATIONS)
 # Internal variables.
 PAPEROPT_a4     = -D latex_paper_size=a4
 PAPEROPT_letter = -D latex_paper_size=letter
-ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees/$$lang $(SPHINXOPTS) -c . -A language=$$lang -D language=$$lang -A languages='$(LANGUAGES)' -A branch=$(GIT_BRANCH)
+ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees/$$lang $(SPHINXOPTS) -c . -A language=$$lang -D language=$$lang -A languages='$(LANGUAGES)'
 
 ALLSPHINXOPTSI18N = $(SPHINXOPTS) -c . -a -A language=$$lang -D language=$$lang -A languages='$(LANGUAGES)'
 

scripts/ci_build_docs.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
+echo "GIT_BRANCH is: $GIT_BRANCH"
 
 git log -n1 | grep -q "\\[build_pdf\\]"