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authorZhiming Wang <zmwangx@gmail.com>2015-03-22 17:09:42 -0700
committerZhiming Wang <zmwangx@gmail.com>2015-03-22 17:09:42 -0700
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parent8c0b8c1de7d7c6fdce824f294474dc952520b22d (diff)
downloadmy_new_personal_website-7e4c9070ca14191368b191a8e7a8ce823e6ab72f.tar.xz
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20150322 Back up OS X app icons
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+---
+layout: post
+title: "Back up OS X app icons"
+date: 2015-03-22 16:58:50 -0700
+comments: true
+categories:
+---
+OS X application icons are valuable assets, and it's interesting to see how they evolve over time. This is especially the case when we upgraded to OS X 10.10 Yosemite, when Apple and many design-aware third party developers overhauled (mainly flattened) their icons.
+
+However, we lose all the old icons when we do a major OS upgrade. Technically they still live in Time Machine backups, but those are a pain to pull out. Therefore, I wrote a script just now to back up app icons of all applications living in `/Applications` (including those symlinked to `/Applications`, e.g., apps installed through `brew cask`) and its level-one subdirectories, and `/System/Library/CoreServices` (for `Finder.app` and such). Here's the script:
+
+```bash backup-app-icons
+#!/usr/bin/env bash
+function app_version
+{
+ # $1 is the path to the app
+ /usr/libexec/PlistBuddy -c "print CFBundleShortVersionString" "$1"/Contents/Info.plist 2>/dev/null || date +%Y%m%d
+}
+
+function app_icon_path
+{
+ # $1 is the path to the app
+ filename=$(/usr/libexec/PlistBuddy -c "print CFBundleIconFile" "$1"/Contents/Info.plist 2>/dev/null)
+ [[ -n ${filename} ]] || return
+ filename=$(basename "${filename}" .icns)
+ echo "$1/Contents/Resources/${filename}.icns"
+}
+
+function process_app
+{
+ # $1 is the path to the app
+ name=$(basename "$1" .app | tr -d ' ')
+ path=$(realpath -e "$1") || { echo "${RED}error: broken link '${path}'${RESET}" >&2; return 1; }
+ version=$(app_version "${path}")
+ icon_path=$(app_icon_path "${path}")
+ [[ -n ${icon_path} ]] || { echo "${YELLOW}warning: '$1' has no app icon${RESET}"; return 1; }
+ [[ -f ${icon_path} ]] || { echo "${RED}error: '${icon_path}' does not exist${RESET}" >&2; return 1; }
+ cp "${icon_path}" "${name}-${version}.icns"
+ echo "${name}-${version}.icns"
+}
+
+find /Applications -maxdepth 2 -name '*.app' | while read app; do process_app "${app}"; done
+find /System/Library/CoreServices -maxdepth 1 -name '*.app' | while read app; do process_app "${app}"; done
+```
+
+The script is also available as a [gist](https://gist.github.com/zmwangx/fad97e085045a21ebc1d).