git-node: suggest -x and --autosquash for git rebase

[joyeecheung]

• Suggest to add -x "git node land --amend" which will put
  exec git node land --amend on every picked commit.
• Suggest to add --autosquash if fixup! or squash! appears
  in the commit messages, which will add fixup or squash actions
  to corresponding commits if they match the autosquash rules.

Used this to land nodejs/node#20121 . Worked pretty well.

[joyeecheung]

BTW the -x idea came from @addaleax

[codecov]

Codecov Report

Merging #237 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #237   +/-   ##
=======================================
  Coverage   88.55%   88.55%           
=======================================
  Files          19       19           
  Lines         708      708           
=======================================
  Hits          627      627           
  Misses         81       81

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[srl295]

Using MitMaro/git-interactive-rebase-tool#62 , I got this result:

$ git rebase upstream/master -i -x "git node land --amend"
Error reading file, /Users/srl/src/node/.git/rebase-merge/git-rebase-todo
Reason: Invalid action: exec
Could not execute editor

It's not a problem with git-node, but it might be worth noting in case someone runs into this. (I didn't file a separate ticket for this, but I could.)

Note you can work around this temporarily with something like:

env GIT_SEQUENCE_EDITOR=emacs git rebase -i b -x "git node land --amend"