晓风残月

set MY_VAR "some value"

set CONFIG_FILE_DIFF_OUTPUT (diff ~/Downloads/config.fish ~/.config/fish/config.fish)
set GIT_STATUS_OUTPUT (git status --porcelain)

set MY_VAR $MY_VAR "another value"

set MY_LIST "value1" "value2" "value3"

set OUR_VAR (math 1+2)
set OUR_VAR (date +%s)
set OUR_VAR (math $OUR_VAR / 60)

set LIST one two three
echo $LIST[1]  # one
echo $LIST[2]  # two
echo $LIST[3]  # three
echo $LIST[-1] # 和上一行等同

set LIST one two three
echo $LIST[1..2]  # one two
echo $LIST[2..3]  # two three
echo $LIST[-1..2] # three two

set FOLDERS bin
set FOLDERS $FOLDERS .atom
set FOLDERS $FOLDERS "my foldername"
for FOLDER in $FOLDERS
  echo "item: $FOLDER"
end

set FOLDERS bin .atom "my foldername"
for FOLDER in $FOLDERS
  echo "item: $FOLDER"
end

set FOLDERS bin .atom "my foldername"
for FOLDER in $FOLDERS ; echo "item: $FOLDER" ; end

if test (count $argv) -lt 2
  echo "Usage: my-script <arg1> <arg2>"
  echo "Eg: <arg1> can be 'foo', <arg2> can be 'bar'"
else
  echo "👋 Do something with $arg1 $arg2"
end

if test $hostname = "mymachine"
  echo "hostname is mymachine"
end

if test -e "somefile"
  echo "somefile exists"
end

if test -d "somefolder"
  echo "somefolder exists"
end

set -l files ~/Downloads/*.mp4 # 這個通配符表達式被展開，包含了實際的文件
if test (count $files) -gt 0
  mv ~/Downloads/*.mp4 ~/Videos/
  echo "📹 Moved '$files' to ~/Videos/"
else
  echo "⛔ No mp4 files found in Downloads"
end

if not test -d "somefolder"
  echo "somefolder does not exist"
end

if (git pull -f --rebase)
  echo "git pull with rebase worked without any issues"
else
  echo "Something went wrong that requires manual intervention, like a merge conflict"
end

if sudo umount /media/user/mountpoint
  echo "Successfully unmounted /media/user/mountpoint"
end

set GIT_STATUS (git status --porcelain)
if set -q $GIT_STATUS ; echo "No changes in repo" ; end
if test -z "$GIT_STATUS" ; echo "No changes in repo" ; end

function requires-two-arguments
  # 沒有參數傳入
  if set -q "$argv"
    echo "Usage: requires-two-arguments arg1 arg2"
    return 1
  end
  # 只傳入一個參數
  if test -z "$argv[1]"; or test -z "$argv[2]"
    echo "arg1 or arg2 can not be empty"
    return 1
  end
  echo "Thank you, got 1) $argv[1] and 2) $argv[2]"
end

if test -z "$variable" ; echo "empty" ; else ; echo "non-empty" ; end

if test -n "$variable" ; echo "non-empty" ; else ; echo "empty" ; end

if not string match -q "*md" $argv[1]
  echo "The argument passed does not end in md"
else
  echo "The argument passed ends in md"
end

set CHECKSUM_ARRAY_STRING (shasum $FILENAME)
set CHECKSUM_ARRAY (string split "  " $SOURCE_CHECKSUM_ARRAY)
set CHECKSUM $CHECKSUM_ARRAY[1]

if string match -q "*myname*" $hostname
  echo "$hostname contains myname"
else
  echo "$hostname does not contain myname"
end

if test $hostname = "machine-name"
  echo "Exact match"
else
  echo "Not exact match"
end

if set -q $my_variable
  echo "my_variable is empty"
end

# Return "true" if $packageName is installed, and "false" otherwise.
# Use it in an if statement like this:
#
# if string match -q "false" (isPackageInstalled my-package-name)
#   echo "my-package-name is not installed"
# else
#   echo "my-package-name is installed"
# end
function isPackageInstalled -a packageName
  set packageIsInstalled (dpkg -l "$packageName")
  if test -z "$packageIsInstalled"
    set packageIsInstalled false
  else
    set packageIsInstalled true
  end
  echo $packageIsInstalled
end

# More info to find if a package is installed: https://askubuntu.com/a/823630/872482
if test (uname) = "Linux"

  echo "🐒isPackageInstalled does-not-exist:" (isPackageInstalled does-not-exist)

  if string match -q "false" (isPackageInstalled ruby-dev) ;
    or string match -q "false" (isPackageInstalled ruby-bundler)
    # Install ruby
    echo "ruby-bundler or ruby-dev are not installed; installing now..."
    echo sudo apt install -y ruby-bundler ruby-dev
  else
    bundle install
    bundle update
    bundle exec jekyll serve
  end

end

switch $hostname
case "*substring1*"
  echo "Matches $hostname containing substring1"
case "*substring2*"
  echo "Matches $hostname containing substring2"
end

if test (uname) = "Darwin"
  echo "Machine is running macOS"
  switch $hostname
  case "*MacBook-Pro*"
    echo "hostname has MacBook-Pro in it"
  case "*MacBook-Air*"
    echo "hostname has MacBook-Air in it"
  end
else
  echo "Machine is not running macOS"
end

echo "ls \
  -la" | sh

function say_hi
  echo "Hi $argv"
end
say_hi
say_hi everbody!
say_hi you and you and you

function testFunction -a param1 param2
  echo "arg1 = $param1"
  echo "arg2 = $param2"
end
testFunction A B

# Note parameter names can't have dashes in them, only underscores.
function my-function -a extension search_term
  if test (count $argv) -lt 2
    echo "Usage: my-function <extension> <search_term>"
    echo "Eg: <extension> can be 'fish', <search_term> can be 'test'"
  else
    echo "✋ Do something with $extension $search_term"
  end
end

function getSHAForFilePath -a filepath
  set NULL_VALUE ""
  # No $filepath provided, or $filepath does not exist -> early return w/ $NULL_VALUE.
  if set -q $filepath; or not test -e $filepath
    echo $NULL_VALUE
    return 0
  else
    set SHASUM_ARRAY_STRING (shasum $filepath)
    set SHASUM_ARRAY (string split "  " $SHASUM_ARRAY_STRING)
    echo $SHASUM_ARRAY[1]
  end
end

function testTheFunction
  echo (getSHAForFilePath ~/local-backup-restore/does-not-exist.fish)
  echo (getSHAForFilePath)
  set mySha (getSHAForFilePath ~/local-backup-restore/test.fish)
  echo $mySha
end

testTheFunction

set MY_FOLDER_PATH (dirname (status --current-filename))
source $MY_FOLDER_PATH/my-script.fish

set MY_FOLDER_PATH (realpath (dirname (status --current-filename)))
source $MY_FOLDER_PATH/my-script.fish

# echo "echo 'ClientAliveInterval 60' >> recurring-tasks.log" | xargs -I% sudo sh -c %
set linesToAdd "TCPKeepAlive yes" "ClientAliveInterval 60" "ClientAliveCountMax 120"
for line in $linesToAdd
  set command "echo '$line' >> /etc/ssh/sshd_config"
  executeString "$command | xargs -I% sudo sh -c %"
end

# More info on writing multiline strings: https://stackoverflow.com/a/35628657/2085356
function _workflowWriteEmptyMarkdownContentToFile --argument datestr filename
  echo > $filename "\
---
Title: About $filename
Date: $datestr
---
<!-- START doctoc generated TOC please keep comment here to allow auto update -->
<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->

<!-- END doctoc generated TOC please keep comment here to allow auto update -->

# Your heading
"
end

function myFunction
  if test (count $argv) -lt 2
    set -l currentFunctionName (status function)
    echo "Usage: "(set_color -o -u)"$currentFunctionName"(set_color normal)\
      (set_color blue)" <arg1> "\
      (set_color yellow)"<arg2>"(set_color normal)
    set_color blue
    echo "- <arg1>: Something about arg1."
    set_color yellow
    echo "- <arg2>: Something about arg2"
    set_color normal
    return 1
  end
end

# More info on prompting a user for confirmation using fish read function: https://stackoverflow.com/a/16673745/2085356
# More info about fish `read` function: https://fishshell.com/docs/current/cmds/read.html
function _promptUserForConfirmation -a message
  if not test -z "$message"
    echo (set_color brmagenta)"🤔 $message?"
  end

  while true
    # read -l -P '🔴 Do you want to continue? [y/N] ' confirm
    read -l -p "set_color brcyan; echo '🔴 Do you want to continue? [y/N] ' ; set_color normal; echo '> '" confirm
    switch $confirm
      case Y y
        return 0
      case '' N n
        return 1
    end
  end
end

if _promptUserForConfirmation "Delete branch $featureBranchName"
  git branch -D $featureBranchName
  echo "👍 Successfully deleted $featureBranchName"
else
  echo "⛔ Did not delete $featureBranchName"
end

echo "./.Android" | sed 's/.\///g'

set folder .Android*
find ~ -maxdepth 1 -name $folder | sed 's/.\///g' | \
  xargs -I % echo "cleaned up name: %"

ls | xargs -I % echo "folder: %"

folder: idea-http-proxy-settings
folder: images
folder: tmp

echo "token1:token2" | cut -d ':' -f 1

cd ~/github/developerlife.com
echo \
"find . -name '*html' | \
 xargs grep fonts.googleapis | \
 cut -d ':' -f 1 | \
 xargs subl" \
 | sh

function timed -d Pass the program or function that you want to execute as an argument
  set START_TS (date +%s)

  # This is where your code would go.
  $argv

  sleep 5

  set END_TS (date +%s)
  set RUNTIME (math $END_TS - $START_TS)
  set RUNTIME (math $RUNTIME / 60)
  echo "⏲ Total runtime: $RUNTIME min ⏲"
end