显示提交ID时git show和git log之间的区别

Question

我需要获取两个已知提交之间的提交ID列表。 我使用以下命令：

git show --format=format:%H --quiet commitA...commitB

它可以完美地工作，直到有合并提交为止。 即：

*   c36a37b
|\
| * 92187d9
* | e24d2c4
|/
* eef755e

输出如下：

$ git show --format=format:%H --quiet c36a37b...eef755e
c36a37b80caf2bae7b4833617443f4dfea8d8816

e24d2c4292baef4106976373ff3d01341834648d
92187d9a1002027c7d99824f2561467692bfd6b3

当我更改show命令并改用log ：

$ git log --format=format:%H --quiet c36a37b...eef755e
c36a37b80caf2bae7b4833617443f4dfea8d8816
e24d2c4292baef4106976373ff3d01341834648d
92187d9a1002027c7d99824f2561467692bfd6b3

注意，第一次提交后没有空行。 我对使用git show不是git log并不热衷-我事件不记得我从哪里得到这个想法。 但这多余的空行导致我的程序失败，我想知道它是否有任何特殊含义。

Git版本1.9.5。

Answer 1

我在手册页上看不到任何解释空白行的原因。 但是，如果将输出传递给另一个程序，则无论如何都不要使用瓷器命令，因为输出格式可能会发生变化。 您想要的命令是

git rev-list c36a37b...eef755e

更新：针对您的特定问题-它有任何意义-我的答案是您不能指望的，因为（a）手册页中未提及它，并且（b） git show的输出是'打算由其他程序解析。

Answer 2

可以（从git show docs获得）有任何线索吗？

    format:
...

If you add a + (plus sign) after % of a placeholder, a line-feed is inserted immediately before the expansion if and only if the placeholder expands to a non-empty string.

If you add a - (minus sign) after % of a placeholder, all consecutive line-feeds immediately preceding the expansion are deleted if and only if the placeholder expands to an empty string.

If you add a ` ` (space) after % of a placeholder, a space is inserted immediately before the expansion if and only if the placeholder expands to a non-empty string.

VS

    tformat:

    The tformat: format works exactly like format:, except that it provides "terminator" semantics instead of "separator" semantics. In other words, each commit has the message terminator character (usually a newline) appended, rather than a separator placed between entries. This means that the final entry of a single-line format will be properly terminated with a new line, just as the "oneline" format does. For example:

    $ git log -2 --pretty=format:%h 4da45bef \
      | perl -pe '$_ .= " -- NO NEWLINE\n" unless /\n/'
    4da45be
    7134973 -- NO NEWLINE

    $ git log -2 --pretty=tformat:%h 4da45bef \
      | perl -pe '$_ .= " -- NO NEWLINE\n" unless /\n/'
    4da45be
    7134973

    In addition, any unrecognized string that has a % in it is interpreted as if it has tformat: in front of it. For example, these two are equivalent: