前言
Ag 是类似ack， grep的工具,它来在文件中搜索相应关键字。
官方列出了几点选择它的理由：
- 它比ack还要快
- 它会忽略.gitignore和.hgignore中的匹配文件
- 如果有你想忽略的文件，你需要将(congh .min.js cough*)加入到.ignore文件中
- 它的命令名称更短:-)
安装
下载源码
下载地址： http://geoff.greer.fm/ag
安装PCRE
目前已经有PCRE2，但这里需要PCRE
https://downloads.sourceforge...
从官网下载.tar.gz的版本，注意不要下载zip版本
下载后解压缩正常安装
./configure --prefix=/usr \
--docdir=/usr/share/doc/pcre-8.41 \
--enable-unicode-properties \
--enable-pcre16 \
--enable-pcre32 \
--enable-pcregrep-libz \
--enable-pcregrep-libbz2 \
--enable-pcretest-libreadline \
--disable-static &&
make && make install
默认是安装到/usr/local下
安装lzma
yum install xz-libs.x86_64 xz-devel.x86_64
安装Ag
./configure PCRE_CFLAGS="-I /usr/local/include" PCRE_LIBS="-L /usr/local/lib -lpcre" && make && make install
命令
Usage: ag [FILE-TYPE] [OPTIONS] PATTERN [PATH] Recursively search for PATTERN in PATH. Like grep or ack,but faster. Example: ag -i foo /bar/ Output Options: --ackmate Print results in AckMate-parseable format -A --after [LINES] Print lines after match (Default: 2) -B --before [LINES] Print lines before match (Default: 2) --[no]break Print newlines between matches in different files (Enabled by default) -c --count Only print the number of matches in each file. (This often differs from the number of matching lines) --[no]color Print color codes in results (Enabled by default) --color-line-number Color codes for line numbers (Default: 1;33) --color-match Color codes for result match numbers (Default: 30;43) --color-path Color codes for path names (Default: 1;32) --column Print column numbers in results --[no]filename Print file names (Enabled unless searching a single file) -H --[no]heading Print file names before each file's matches (Enabled by default) -C --context [LINES] Print lines before and after matches (Default: 2) --[no]group Same as --[no]break --[no]heading -g --filename-pattern PATTERN Print filenames matching PATTERN -l --files-with-matches Only print filenames that contain matches (don't print the matching lines) -L --files-without-matches Only print filenames that don't contain matches --print-all-files Print headings for all files searched,even those that don't contain matches --[no]numbers Print line numbers. Default is to omit line numbers when searching streams -o --only-matching Prints only the matching part of the lines --print-long-lines Print matches on very long lines (Default: >2k characters) --passthrough When searching a stream,print all lines even if they don't match --silent Suppress all log messages,including errors --stats Print stats (files scanned,time taken,etc.) --stats-only Print stats and nothing else. (Same as --count when searching a single file) --vimgrep Print results like vim's :vimgrep /pattern/g would (it reports every match on the line) -0 --null --print0 Separate filenames with null (for 'xargs -0') Search Options: -a --all-types Search all files (doesn't include hidden files or patterns from ignore files) -D --debug Ridiculous debugging (probably not useful) --depth NUM Search up to NUM directories deep (Default: 25) -f --follow Follow symlinks -F --fixed-strings Alias for --literal for compatibility with grep -G --file-search-regex PATTERN Limit search to filenames matching PATTERN --hidden Search hidden files (obeys .*ignore files) -i --ignore-case Match case insensitively --ignore PATTERN Ignore files/directories matching PATTERN (literal file/directory names also allowed) --ignore-dir NAME Alias for --ignore for compatibility with ack. -m --max-count NUM Skip the rest of a file after NUM matches (Default: 10,000) --one-device Don't follow links to other devices. -p --path-to-ignore STRING Use .ignore file at STRING -Q --literal Don't parse PATTERN as a regular expression -s --case-sensitive Match case sensitively -S --smart-case Match case insensitively unless PATTERN contains uppercase characters (Enabled by default) --search-binary Search binary files for matches -t --all-text Search all text files (doesn't include hidden files) -u --unrestricted Search all files (ignore .ignore,.gitignore,etc.; searches binary and hidden files as well) -U --skip-vcs-ignores Ignore VCS ignore files (.gitignore,.hgignore; still obey .ignore) -v --invert-match -w --word-regexp Only match whole words -W --width NUM Truncate match lines after NUM characters -z --search-zip Search contents of compressed (e.g.,gzip) files File Types: The search can be restricted to certain types of files. Example: ag --html needle - Searches for 'needle' in files with suffix .htm,.html,.shtml or .xhtml. For a list of supported file types run: ag --list-file-types ag was originally created by Geoff Greer. More information (and the latest release) can be found at http://geoff.greer.fm/ag
自动安装脚本示例
#!/usr/bin/env bash
#Author: Harris Zhu
#Dep: make sure you have the root permission
#Usage . install_ag.sh
set -x
TEMP_DIR=$(mktemp -d Leslie.Guan.XXXXXX)
cd ${TEMP_DIR}
wget https://github.com/ggreer/the_silver_searcher/archive/master.zip
TAR_DIR=$(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 install
cd ../../
rm -rf ${TEMP_DIR}
ag -V
set +x
pattern
示例一
由上面例子可以知道ag的pattern支持s,w等正则
后言
ag的使用非常简单，它的选项也不多，所以我在上面列出了它的help内容。它本身已经非常强大，搭配上fzf就会更强大，所以下一篇我会写fzf。
