chore(cache): cache management script

Cf. angular#2088.

Author: chalin

scripts/cache.sh

@@ -0,0 +1,74 @@
+#!/usr/bin/env bash
+
+set -e -o pipefail
+
+BASE="public/docs/ts"
+LATEST="$BASE/latest"
+CACHE="$BASE/_cache"
+
+FILES="
+guide/architecture.jade
+guide/attribute-directives.jade
+guide/component-styles.jade
+guide/dependency-injection.jade
+guide/displaying-data.jade
+guide/hierarchical-dependency-injection.jade
+guide/lifecycle-hooks.jade
+guide/pipes.jade
+guide/security.jade
+guide/server-communication.jade
+guide/structural-directives.jade
+guide/template-syntax.jade
+quickstart.jade
+tutorial/toh-pt6.jade"
+
+function cacheRefresh() {
+    local FILE_PATTERN="*"
+    if [[ -n "$1" ]]; then
+        FILE_PATTERN="$1"
+    else
+        echo "Argument missing: specify shell file glob pattern of files to be refreshed."
+        exit 1;
+    fi
+
+    local allFound=true;
+    
+    for f in $FILES; do
+        local srcPath="$LATEST/$f";
+        local destPath="$CACHE/$f";
+        local destDir=`dirname $destPath`;
+        if [[ -e $srcPath ]]; then
+            [[ -d "$destDir" ]] || (set -x; mkdir $destDir);
+            case "$f" in
+                ($FILE_PATTERN)
+                    (set -x; cp $srcPath $destPath);;
+                (*)
+                    echo "SKIPPED $f";;
+            esac
+        else
+            echo Cannot find $srcPath
+            allFound=false;
+        fi
+    done
+
+    [[ $allFound ]] || exit 1;
+}
+
+function cacheDiff() {
+    diff -qr -x "_*.*" "$CACHE/" "$LATEST/" | \
+        grep -v "^Only in"
+}
+
+function usage() {
+    echo "Usage: cache.sh [-d | -l | -r pattern]"
+    echo "  -d      diff cache and latest subdirectories"
+    echo "  -l      list files subject to caching"
+    echo "  -r pat  refresh files in cache matching pattern"
+}
+
+case "$1" in
+    (-r)    shift; cacheRefresh $@;;
+    (-d)    shift; cacheDiff $@;;
+    (-l)    shift; printf "$FILES\n\n";;
+    (*)     usage;
+esac