Add check_links workflow

Author: urfeex

.github/helpers/check_urls.sh

@@ -0,0 +1,67 @@
+#!/bin/bash
+
+set -e
+
+IGNORE_FILES=""
+IGNORE_PATTERNS=""
+
+while getopts ":f:d:p:" opt; do
+    case "${opt}" in
+        f)
+            IGNORE_FILES="${OPTARG}";;
+        d)
+            IGNORE_DIRS="${OPTARG}";;
+        p)
+            IGNORE_PATTERNS="${OPTARG}";;
+        \?)
+            echo "Invalid option -$OPTARG"
+            exit;;
+    esac
+done
+
+read -r -a ignore_files <<<"$IGNORE_FILES"
+read -r -a ignore_dirs <<<"$IGNORE_DIRS"
+read -r -a ignore_patterns <<<"$IGNORE_PATTERNS"
+
+IGNORE_FILES_ARG=""
+for item in "${ignore_files[@]}"; do
+  IGNORE_FILES_ARG="$IGNORE_FILES_ARG --exclude=$item"
+done
+IGNORE_DIRS_ARG=""
+for item in "${ignore_dirs[@]}"; do
+  IGNORE_DIRS_ARG="$IGNORE_DIRS_ARG --exclude-dir=$item"
+done
+
+#Find URLs in code:
+urls=$(grep -oP '(http|ftp|https):\/\/([a-zA-Z0-9_-]+(?:(?:\.[a-zA-Z0-9_-]+)+))([a-zA-Z0-9_.,@?^=%&:\/~+#-]*[a-zA-Z0-9_@?^=%&\/~+#-])?' -rI $IGNORE_FILES_ARG $IGNORE_DIRS_ARG)
+
+fail_counter=0
+
+FAILED_LINKS=()
+for item in $urls; do
+#     echo $item
+    skip=0
+    for pattern in "${ignore_patterns[@]}"; do
+      [[ "$item" =~ $pattern ]] && skip=1
+    done
+
+    if [[ $skip == 1 ]]; then
+      echo "SKIPPING $item"
+      continue
+    fi
+
+    filename=$(echo "$item" | cut -d':' -f1)
+    url=$(echo "$item" | cut -d':' -f2-)
+    echo -n "Checking $url from file $filename"
+    if ! curl --head --silent --fail "$url" 2>&1 > /dev/null; then
+        echo -e " \033[0;31mNOT FOUND\033[32m\n"
+        FAILED_LINKS+=("$url from file $filename")
+        ((fail_counter=fail_counter+1))
+    else
+        printf " \033[32mok\033[0m\n"
+    fi
+done
+
+echo "Failed files:"
+printf '%s\n' "${FAILED_LINKS[@]}"
+exit $fail_counter

.github/workflows/check_links.yml

@@ -0,0 +1,19 @@
+name: Check Links
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    branches:
+      - main
+
+jobs:
+  check_links:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Check URLs
+        run: |
+          .github/helpers/check_urls.sh \
+            -d ".git build CMakeModules debian" \
+            -f "package.xml ursim_docker.rst architecture_coarse.svg" \
+            -p "vnc\.html opensource\.org\/licenses\/BSD-3-Clause"