Mac下输出目录树层结构的tree命令

因为项目需要输出目录树层结构，了解到需要借助tree，下面就简单介绍下tree的安装和使用：

首先mac下使用 brew包管理工具，安装 tree

注意：安装的时候可能会提示Homebrew需要更新，那就先执行brew update，再执行下面的命令

brew install tree

安装成功后可以使用--help查看帮助信息

tree --help

如下功能

localhost:~ mingming$ tree --help
usage: tree [-acdfghilnpqrstuvxACDFJQNSUX] [-H baseHREF] [-T title ]
	[-L level [-R]] [-P pattern] [-I pattern] [-o filename] [--version]
	[--help] [--inodes] [--device] [--noreport] [--nolinks] [--dirsfirst]
	[--charset charset] [--filelimit[=]#] [--si] [--timefmt[=]<f>]
	[--sort[=]<name>] [--matchdirs] [--ignore-case] [--fromfile] [--]
	[<directory list>]
  ------- Listing options -------
  -a            All files are listed.
  -d            List directories only.
  -l            Follow symbolic links like directories.
  -f            Print the full path prefix for each file.
  -x            Stay on current filesystem only.
  -L level      Descend only level directories deep.
  -R            Rerun tree when max dir level reached.
  -P pattern    List only those files that match the pattern given.
  -I pattern    Do not list files that match the given pattern.
  --ignore-case Ignore case when pattern matching.
  --matchdirs   Include directory names in -P pattern matching.
  --noreport    Turn off file/directory count at end of tree listing.
  --charset X   Use charset X for terminal/HTML and indentation line output.
  --filelimit # Do not descend dirs with more than # files in them.
  --timefmt <f> Print and format time according to the format <f>.
  -o filename   Output to file instead of stdout.
  ------- File options -------
  -q            Print non-printable characters as '?'.
  -N            Print non-printable characters as is.
  -Q            Quote filenames with double quotes.
  -p            Print the protections for each file.
  -u            Displays file owner or UID number.
  -g            Displays file group owner or GID number.
  -s            Print the size in bytes of each file.
  -h            Print the size in a more human readable way.
  --si          Like -h, but use in SI units (powers of 1000).
  -D            Print the date of last modification or (-c) status change.
  -F            Appends '/', '=', '*', '@', '|' or '>' as per ls -F.
  --inodes      Print inode number of each file.
  --device      Print device ID number to which each file belongs.
  ------- Sorting options -------
  -v            Sort files alphanumerically by version.
  -t            Sort files by last modification time.
  -c            Sort files by last status change time.
  -U            Leave files unsorted.
  -r            Reverse the order of the sort.
  --dirsfirst   List directories before files (-U disables).
  --sort X      Select sort: name,version,size,mtime,ctime.
  ------- Graphics options -------
  -i            Don't print indentation lines.
  -A            Print ANSI lines graphic indentation lines.
  -S            Print with CP437 (console) graphics indentation lines.
  -n            Turn colorization off always (-C overrides).
  -C            Turn colorization on always.
  ------- XML/HTML/JSON options -------
  -X            Prints out an XML representation of the tree.
  -J            Prints out an JSON representation of the tree.
  -H baseHREF   Prints out HTML format with baseHREF as top directory.
  -T string     Replace the default HTML title and H1 header with string.
  --nolinks     Turn off hyperlinks in HTML output.
  ------- Input options -------
  --fromfile    Reads paths from files (.=stdin)
  ------- Miscellaneous options -------
  --version     Print version and exit.
  --help        Print usage and this help message and exit.
  --            Options processing terminator.
localhost:~ mingming$

输出你的树层目录结构

1. cd目标文件夹路径
2. tree一下，会将该层级下所有的文件都遍历输出

常用命令

• 显示项目的层级，n表示层级数。例：显示项目三层结构，tree -L 3

tree -L n

• 只显示文件夹

tree -d 

• tree -I name 用于过滤不想要显示的文件或者文件夹。比如要过滤项目中的node_modules文件夹

tree -I “node_modules”

• 把一个目录的结构树导出到文件Readme.md

tree -L 2 >README.md //然后我们看下当前目录下的 README.md 文件

• 过滤项目中的node_modules文件夹，显示项目四层结构，并将结构树导出到文件Readme.md

tree -I "node_modules" -L 4 >README.md