Ag （the_silver_searcher） 安裝使用

if (I am a Programmer || I have a strong sense of time) I use ag

1. 安裝命令列ag(代碼中行首的“\”是多餘的)

\#!/usr/bin/env bash\#Author Leslie Guan\#make sure you have the root permission\#Usage . install_ag.shset -xTEMP_DIR=$(mktemp -d Leslie.Guan.XXXXXX)cd ${TEMP_DIR}wget https://github.com/ggreer/the_silver_searcher/archive/master.zipTAR_DIR=$(unzip *.zip)TAR_DIR=${TAR_DIR%%/*}TAR_DIR=${TAR_DIR##*:}cd ${TAR_DIR}apt-get install -y automake pkg-config libpcre3-dev zlib1g-dev liblzma-dev --force-yes./build.sh && make installcd ../../rm -rf ${TEMP_DIR}ag -Vset +x

ubuntu13.10以後可以直接運行

apt-get install silversearcher-ag

ag_GitHub

2. 安裝Vim外掛程式( 必須先安裝ag命令列工具)(代碼中行首的“\”是多餘的)

\#!/usr/bin/env bash\#Author Leslie Guan\#make sure you have the root permission\#Usage . install_Ag4Vim.shset -xTEMP_DIR=$(mktemp -d Leslie.Guan.XXXXXX)cd ${TEMP_DIR}wget https://github.com/rking/ag.vim/archive/master.zipTAR_DIR=$(unzip *.zip)TAR_DIR=${TAR_DIR%%/*}TAR_DIR=${TAR_DIR##*:}cd ${TAR_DIR}cp cp {plugin,autoload,doc} /usr/share/vim/vimcurrent/ -rf cd ../../rm -rf ${TEMP_DIR}
set +x

ag.vim_GitHub

3. 使用

命令列使用

ag HelloWorldag HelloWorld path/to/search

Ag HelloWorldAg HelloWorld path/to/search

在Ag尋找出來的quickfix視窗中，你可以使用下列命令：

e    to open file and close the quickfix windowo    to open (same as enter)go   to preview file (open but maintain focus on ag.vim results)t    to open in new tabT    to open in new tab silentlyh    to open in horizontal splitH    to open in horizontal split silentlyv    to open in vertical splitgv   to open in vertical split silentlyq    to close the quickfix window

詳細使用方法請查看協助：

man ag

4. Why ag

速度對比ag>ack>grep

在android全部源碼中尋找（測試環境20線程32GB記憶體）：

time ag -i activityreal    2m42.568suser    0m16.049ssys 1m29.358s

time ack -i activityreal    5m17.780suser    1m35.830ssys 0m17.521s

time grep -Hrni activity .real    49m27.518suser    43m13.918ssys 0m38.178s

What's so great about Ag?

It searches code about 3–5× faster than ack.It ignores file patterns from your .gitignore and .hgignore.If there are files in your source repo you don't want to search, just add their patterns to a .agignore file. *cough* extern *cough*The command name is 33% shorter than ack!