fix: check if required commands are available

maven build will not fail

.scripts/convert-readme.sh

@@ -2,25 +2,40 @@
 
 set -e
 
+# Check if a command is installed
+function check_command() {
+  if ! command -v "$1" &> /dev/null; then
+    echo -e "\033[0;31m $1 is not installed! \033[0m" >&2
+    echo -e "\033[0;31m Help for About page will not be generated! \033[0m" >&2
+    exit 0
+  fi
+}
+
+# Check if required commands are installed
+check_command jq
+check_command curl
+check_command awk
+
 INPUT_FILE="${1:-README.md}"
 OUTPUT_FILE="${2:-README.html}"
 
 # Convert the markdown file to a JSON payload
-jq -R -s '{"mode": "gfm", "text": .}' < "$INPUT_FILE" > payload.json
+JSON_PAYLOAD=$(jq -R -s '{"mode": "gfm", "text": .}' < "$INPUT_FILE")
 
 # Send the JSON payload to the GitHub API
-curl -L \
+CURL_OUTPUT=$(curl -L \
   -X POST \
   -H "Accept: application/vnd.github+json" \
   -H "X-GitHub-Api-Version: 2022-11-28" \
   https://api.github.com/markdown \
-  -d @payload.json > "$OUTPUT_FILE"
+  -d "$JSON_PAYLOAD")
 
-# Remove the temporary JSON payload
-rm payload.json
-
-# Remove the Build and Installation sections from readme
-awk '
+# Process the curl output with awk to remove the Build, Installation and Changelog sections
+MODIFIED_CONTENT=$(echo "$CURL_OUTPUT" | awk '
 /<h2>Build<\/h2>/ {skip=1; next}
 /<h2>Polarion configuration<\/h2>/ {skip=0}
-!skip' "$OUTPUT_FILE" > "$OUTPUT_FILE.tmp" && mv "$OUTPUT_FILE.tmp" "$OUTPUT_FILE"
+/<h2>Changelog<\/h2>/ {skip=1; next}
+!skip')
+
+# Write the modified content to the output file
+echo "$MODIFIED_CONTENT" > "$OUTPUT_FILE"