fix: check if required commands are available

maven build will not fail on local machines, but will fail during GitHub Actions build

.github/workflows/maven-release.yml

@@ -58,6 +58,8 @@ jobs:
         run: cat /home/runner/.m2/settings.xml
       - name: Build with Maven
         run: mvn --batch-mode -DwpExporterImpl=docker clean package -P tests-with-weasyprint-docker
+        env:
+          FAIL_ON_CHECK_COMMANDS: 'true'
       - name: Extract artefact version
         id: artefact_version
         run: echo "version=$(mvn help:evaluate -Dexpression=project.version -q -DforceStdout)" >> $GITHUB_OUTPUT

.scripts/convert-readme.sh

@@ -7,12 +7,17 @@ function check_command() {
   if ! command -v "$1" &> /dev/null; then
     echo -e "\033[0;31m $1 is not installed! \033[0m" >&2
     echo -e "\033[0;31m Help for About page will not be generated! \033[0m" >&2
-    exit 0
+
+    if [ -n "$FAIL_ON_CHECK_COMMANDS" ]; then
+      exit 1
+    else
+      exit 0
+    fi
   fi
 }
 
 # Check if required commands are installed
-check_command jq
+check_command jq1
 check_command curl
 check_command awk