git - git log --exit-code 是什么意思？

Question

git-log man page将 --check 选项描述为与 --exit-code 选项不兼容。我想知道这个 --exit-code 是什么意思，但我无法在任何地方找到它。我试过 man git log、man git、Google 和直接搜索 SO... 无济于事!

--exit-code 对 git log 意味着什么？

Answer 1

TL;博士

I'd like to know what this --exit-code means [...]

--exit-code 是一个 diff-*¹ 选项，它使 Git 命令以 1 退出> 如果有变化，则 0 否则。

[...] but I can't find it anywhere.

您可以在 git-diff 手册页中阅读它(它只在 git-log 手册页中提到)。

更多详情

--check 和 --exit-code 都在 git-diff 手册页中描述(更具体地说，在 Documentation/diff-options.txt 中) :

   --check
 Warn if changes introduce whitespace errors. What are considered
 whitespace errors is controlled by core.whitespace configuration.
 By default, trailing whitespaces (including lines that solely
 consist of whitespaces) and a space character that is immediately
 followed by a tab character inside the initial indent of the line
 are considered whitespace errors. Exits with non-zero status if
 problems are found. Not compatible with --exit-code.

和

   --exit-code
 Make the program exit with codes similar to diff(1). That is, it
 exits with 1 if there were differences and 0 means no differences.

一些(虽然不是全部)diff-* 选项与 git-log 兼容。 --check 选项是，而 --exit-code 选项不是，正如 commit message 中的以下 Git-project repository 所暗示的:

docs: don't mention --quiet or --exit-code in git-log(1)

These are diff-options, but they don't actually make sense in the context of log.

(1) _{diff-* 代表 porcelain git-diff 所基于的管道命令。}