Emacsとその周辺 / Emacs and CLI tools

社内勉強会の資料です

Transcript

1. Emacsͱͦͷपล
   2017.06.09 @fujiwara
   

   View Slide

2. ͳͥ Emacs Λ࢖͍ͬͯΔͷ͔
   1. େֶͰ࠷ॳʹ࢖Θ͞Εͨͷ͕ Mule ͩͬͨ(1994೥)
   Emacs → Nemacs(೔ຊޠԽ) → Mule(ଟݴޠԽ)
   → ຊମʹ੒ՌऔΓࠐΈ(Emacs 20,21)
   2. ͦͷޙ JED Λ Emacs ΩʔόΠϯυͰ࢖ͬͯͨ(2000೥)
   www.jedsoft.org/jed/
   3. Emacs ʹ໭͖ͬͯͨ (200?೥)
   

   View Slide

3. Vim ΋࢖͍·͢
   .vimrc 1ߦ
   syntax on
   • Ͳ͜ͷαʔόͰ΋࡞ۀ͢ΔͨΊ
   • ઃఆϑΝΠϧ͸ͳΜͱͳ͘ vim Ͱ͍͡Δ͜ͱ͕ଟ͍
   

   View Slide

4. screen
   .screenrc ̍ߦ
   escape ^z^z
   • Ͳ͜ͷαʔόͰ΋࡞ۀ͢ΔͨΊ
   • Ctrl-A ͩͱਏ͍
   $ echo "escape ^z^z" > ~/.screenrc
   ιϥͰଧͯΔ
   

   View Slide

5. emacsclient
   ىಈ͍ͯ͠Δ Emacs ʹରͯ͠ϑΝΠϧΛ։͔ͤΔίϚϯυ
   ;; .emacs
   (server-start)
   # .zshrc
   alias ec='emacsclient -n'
   $ ec ϑΝΠϧ໊
   Ͱىಈ͍ͯ͠Δ Emacs ͰϑΝΠϧΛ։͚Δ
   

   View Slide

6. emacsclient
   -n Φϓγϣϯ: block͠ͳ͍
   EmacsʹϑΝΠϧΛ։͔ͤͨΒ໭ͬͯ͘Δ
   (σϑΥϧτ͸ϑΝΠϧΛด͡Δ·Ͱ଴ͭ)
   ීஈ͸͜ΕΛ࢖͏
   

   View Slide

7. EDITOR=emacsclient
   # .zshrc
   export EDITOR=$HOME/local/bin/emacsclient
   git commit ͨ͠ͱ͖ʹ Emacs ͰίϛοτϩάΛฤूͰ͖Δ
   (͜ͷ৔߹ -n Λ෇͚ͯ͸͍͚ͳ͍)
   

   View Slide

8. peco
   github.com/peco/peco
   Ctrl-R ͰώετϦΛ peco ͰḷΔ
   # .zshrc
   function peco_select_history() {
   BUFFER=$(fc -l -n 1 | gtac | peco --query "$LBUFFER")
   CURSOR=$#BUFFER # move cursor
   zle -R -c # refresh
   }
   zle -N peco_select_history
   bindkey '^R' peco_select_history
   

   View Slide

9. ghq + peco
   github.com/motemen/ghq
   GoͷϦϙδτϦϨΠΞ΢τͰશͯͷ git repo Λ഑ஔ͢Δౕ
   peco Ͱબ୒ͯ͠ cd ͢Δ
   function peco-src () {
   local selected_dir=$(ghq list | peco --query "$LBUFFER")
   if [ -n "$selected_dir" ]; then
   BUFFER="cd $HOME/src/${selected_dir}"
   zle accept-line
   fi
   zle clear-screen
   }
   zle -N peco-src
   bindkey '^]' peco-src
   

   View Slide

10. direnv
    github.com/direnv/direnv
    # .envrc
    export AWS_PROFILE=someproject-assumerole
    export AWS_REGION=ap-northeast-1
    $ cd /Users/fujiwara/src/github.com/fujiwara/someproject
    direnv: loading .envrc
    direnv: export +AWS_PROFILE +AWS_REGION
    ϓϩδΣΫτʹԠͨ͡؀ڥม਺Λઃఆ
    

    View Slide

11. gh-open
    github.com/typester/gh-open
    $ gh-open ~/path/to/repo
    GitHubͷϖʔδΛϒϥ΢βͰ։͍ͯ͘ΕΔ
    

    View Slide

12. ag + peco + ec
    github.com/ggreer/the_silver_searcher/
    ཁ͢Δʹ͍͢͝ grep
    # .zshrc
    agec () {
    emacsclient -n $(ag $@ | peco --query "$LBUFFER" | awk -F: '{print "+" $2, $1}')
    }
    ag Ͱ grep ͨ݁͠ՌΛ peco Ͱબ୒
    "ϑΝΠϧ໊:ߦ൪߸:ߦͷ಺༰" → awk Ͱ "+ߦ൪߸ ϑΝΠϧ໊"
    emacsclient -n +10 foo.txt
    (foo.txt Λ Emacs Ͱ։͍ͯ10ߦ໨ʹҠಈ)
    

    View Slide