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git diff とか format-patch で特定コミットとその直前コミットを指定する

More than 3 years have passed since last update.

直前 commit との diff

$ git diff #{commit_hash}^..#{commit_hash}

5 個前の commit との format-patch

$ git format-patch #{commit_hash}~5..#{commit_hash} -o/tmp/patch

HEAD^ で最新の一個前が、HEAD~5 で最新の 5 個前が指定できることは知っていましたが、
HEAD の部分がコミットハッシュでも良いと今知りました。

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