[build] Add a script that updates social tags for examples

src/update-example-tags.sh

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+
+set -Eeuo pipefail
+
+# allow for simple recursive file globs
+shopt -s globstar
+
+# the left entries will be replaced by the right entries
+# the following variables can be used in the replacement: \$filename, \$title, \$imgname, \$category
+declare -A replacements=(
+    "<title>raylib web game</title>"                        "<title>\$title</title>"
+    "<meta name=\"title\" content=\"raylib web game\">"     "<meta name=\"title\" content=\"\$title\">"
+    "New raylib web videogame\, developed using raylib videogames library" "raylib [\$category] example - \$title"
+    "raylib - example"                                      "raylib - \$title"
+    "https://www.raylib.com/common/raylib_logo.png"         "https://raw.githubusercontent.com/raysan5/raylib/master/examples/\$category/\$imgname"
+    "https://www.raylib.com/games.html"                     "https://www.raylib.com/examples/\$category/\$filename"
+    "raylib web game"                                       "\$title"
+)
+
+function update_tags {
+    echo "update tags for: $1"
+    export filename=$(basename $1)
+    noext="${filename%.*}"
+    export title="${noext//_/ }"
+    export imgname="${noext}.png"
+    parts=($title)
+    export category="${parts[0]}"
+
+    for key in "${!replacements[@]}"; do
+        r=${replacements[$key]}
+        r=$(envsubst <<< "$r")
+        bash -c "sed -i 's,$key,$r,g' $1"
+    done
+}
+
+pushd ../examples
+
+for i in **/*.html; do
+    update_tags "$i"
+done