0x06-Awesome command line slide | 记一次分享命令行的幻灯片

// https://twitter.com/steveluscher/status/741089564329054208
// Map/filter/reduce in a tweet:

map([🌽, 🐮, 🐔], cook)
=> [🍿, 🍔, 🍳]

filter([🍿, 🍔, 🍳], isVegetarian)
=>  [🍿, 🍳]

reduce([🍿, 🍳], eat)
=> 💩

man bash

mv --help

ls -l | less

curl "http://en.wikipedia.org/wiki/Pipeline_(Unix)" | \
sed 's/[^a-zA-Z ]/ /g' | \
tr 'A-Z ' 'a-z\n' | \
grep '[a-z]' | \
sort -u | \
comm -23 - /usr/share/dict/words | \
less

$ echo foo bar baz
foo bar baz
$ !!
echo foo bar baz
foo bar baz

echo 1 > 1.txt # 将数字 1 写入文件 1.txt

cat 1.txt # 输出 1.txt 的内容
# 输出：1

echo 2 >> 1.txt # 将数字 2 写入文件 1.txt 的末行

cat 1.txt | clip.exe # 通过管道将文件 1.txt 的内容传输到 windows 的剪切板

$ curl 'https://api.github.com/repos/stedolan/jq/commits?per_page=5' | jq '.'
# formatter
[
  {
    "sha": "d25341478381063d1c76e81b3a52e0592a7c997f",
    "commit": {
      "author": {
        "name": "Stephen Dolan",
        "email": "[email protected]",
        "date": "2013-06-22T16:30:59Z"
      },
      "committer": {
        "name": "Stephen Dolan",
        "email": "[email protected]",
        "date": "2013-06-22T16:30:59Z"
      },
      "message": "Merge pull request #162 from stedolan/utf8-fixes\n\nUtf8 fixes. Closes #161",
      "tree": {
        "sha": "6ab697a8dfb5a96e124666bf6d6213822599fb40",
        "url": "https://api.github.com/repos/stedolan/jq/git/trees/6ab697a8dfb5a96e124666bf6d6213822599fb40"
      },
      "url": "https://api.github.com/repos/stedolan/jq/git/commits/d25341478381063d1c76e81b3a52e0592a7c997f",
      "comment_count": 0
    },
    "url": "https://api.github.com/repos/stedolan/jq/commits/d25341478381063d1c76e81b3a52e0592a7c997f",
    "html_url": "https://github.com/stedolan/jq/commit/d25341478381063d1c76e81b3a52e0592a7c997f",
    "comments_url": "https://api.github.com/repos/stedolan/jq/commits/d25341478381063d1c76e81b3a52e0592a7c997f/comments",
    "author": {
      "login": "stedolan",
...

http PUT httpbin.org/put X-API-Token:123 name=John

# http [flags] [METHOD] URL [ITEM [ITEM]]

# 新建一个文件
code README.md
# 新建两个文件
code foo.md bar.md
# 编辑一个已存在的文件
code foo.md
# diff 比较两个文件
code -d foo.md bar.md
code --diff foo.md bar.md
# 新打开一个窗口
code -n

code --help

Visual Studio Code 1.43.1

Usage: code.exe [options][paths...]

To read output from another program, append '-' (e.g. 'echo Hello World | code.exe -')

Options
  -d --diff <file> <file>           Compare two files with each other.
  -a --add <folder>                 Add folder(s) to the last active window.
  -g --goto <file:line[:character]> Open a file at the path on the specified
                                    line and character position.
  -n --new-window                   Force to open a new window.
  -r --reuse-window                 Force to open a file or folder in an
                                    already opened window.
  -w --wait                         Wait for the files to be closed before
                                    returning.
  --locale <locale>                 The locale to use (e.g. en-US or zh-TW).
  --user-data-dir <dir>             Specifies the directory that user data is
                                    kept in. Can be used to open multiple
                                    distinct instances of Code.
  -v --version                      Print version.
  -h --help                         Print usage.
  --telemetry                       Shows all telemetry events which VS code
                                    collects.
  --folder-uri <uri>                Opens a window with given folder uri(s)
  --file-uri <uri>                  Opens a window with given file uri(s)

Extensions Management
  --extensions-dir <dir>                            Set the root path for
                                                    extensions.
  --list-extensions                                 List the installed
                                                    extensions.
  --show-versions                                   Show versions of installed
                                                    extensions, when using
                                                    --list-extension.
  --category                                        Filters installed
                                                    extensions by provided
                                                    category, when using
                                                    --list-extension.
  --install-extension <extension-id | path-to-vsix> Installs or updates the
                                                    extension. Use `--force`
                                                    argument to avoid
                                                    prompts.
  --uninstall-extension <extension-id>              Uninstalls an extension.
  --enable-proposed-api <extension-id>              Enables proposed API
                                                    features for extensions.
                                                    Can receive one or more
                                                    extension IDs to enable
                                                    individually.

Troubleshooting
  --verbose                          Print verbose output (implies --wait).
  --log <level>                      Log level to use. Default is 'info'.
                                     Allowed values are 'critical', 'error',
                                     'warn', 'info', 'debug', 'trace', 'off'.
  -s --status                        Print process usage and diagnostics
                                     information.
  --prof-startup                     Run CPU profiler during startup
  --disable-extensions               Disable all installed extensions.
  --disable-extension <extension-id> Disable an extension.
  --inspect-extensions <port>        Allow debugging and profiling of
                                     extensions. Check the developer tools for
                                     the connection URI.
  --inspect-brk-extensions <port>    Allow debugging and profiling of
                                     extensions with the extension host being
                                     paused after start. Check the developer
                                     tools for the connection URI.
  --disable-gpu                      Disable GPU hardware acceleration.
  --max-memory                       Max memory size for a window (in Mbytes).

import java.util.Scanner;

public class AiMain {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String str;
        while (true) {
            str = sc.next();
            str = str.replace("吗", "");
            str = str.replace("?", "!");
            str = str.replace("? ", "! ");
            System.out.println(str);
        }
    }
}

ln [参数][目标文件或目录]

from optparse import OptionParser
...
parser = OptionParser()
parser.add_option("-f", "--file", dest="filename", 
                  help="write report to FILE", metavar="FILE")
parser.add_option("-q", "--quiet",
                  action="store_false", dest="verbose", default=True,
                  help="don't print status messages to stdout")

(options, args) = parser.parse_args()

# With these few lines of code, users of your script can now do the "usual thing" on the command-line, for example:

#   <yourscript> --file=outfile -q

class FuzzCommand {
    public static void main(String[] args)  {
        // do some stuffs
        System.out.print(args[0])
    }
// javac FuzzCommand.java
// java FuzzCommand Fuzz

def enable():
    HEADER = '\033[95m'
    OKBLUE = '\033[94m'
    OKGREEN = '\033[92m'
    WARNING = '\033[93m'
    FAIL = '\033[91m'
    ENDC = '\033[0m'
    BOLD = "\033[1m"

def disable():
    HEADER = ''
    OKBLUE = ''
    OKGREEN = ''
    WARNING = ''
    FAIL = ''
    ENDC = ''

def infog(msg):
    print(OKGREEN + msg + ENDC)

def info(msg):
    print(OKBLUE + msg + ENDC)

def warn(msg):
    print(WARNING + msg + ENDC)

def err(msg):
    print(FAIL + msg + ENDC)

enable()

# git
function invoke-git {
  [alias('g')]
  param(
    [parameter(mandatory = $true, position = 0)]
    [string]
    $cmd,

    [parameter(mandatory = $false, valuefromremainingarguments = $true)]
    [string[]]
    $params
  )

  switch ($cmd) {
    # add
    'a' { git add $params }
    # branch
    'b' { git branch $params }
    # checkout
    'c' { git checkout $params }
    # clone repo
    'cl' { git clone $params }
    # commit
    'co' { git commit $params }
    # fetch
    'f' { git fetch $params }
    # init
    'i' { git init $params }
    # log
    'l' { git log $params }
    # pretty log
    'll' { git log --graph --pretty=format:'%cred%h%creset -%c(yellow)%d%creset %s %cgreen(%cr) %c(bold blue)<%an>%creset' --abbrev-commit }
    # merge
    'm' { git merge $params }
    # pull
    'pl' { git pull $params }
    # push
    'ps' { git push $params }
    # rebase
    'r' { git rebase $params }
    # reset changes
    'rs' { git reset $params }
    # status
    's' { git status $params }
    # tag
    't' { git tag $params }
    # catchall
    default { git $cmd $params }
  }
}