git show --stat或git show -s用来获取最后一次commit的简介信息：
git show--s
输出结果：
commit32c6da406ebfda28a4a7ac8eefd59a104a2a4022(HEAD->master,origin/master,origin/HEAD)
Author:Ivan Li<IvanLi@meituan.com>
Date:Mon Mar2509:47:272019+0800
update:just build unittestbysome git authors
加上--format或--pretty来提取你想要的信息。如想要摘取author，则用'%an'：
git show-s--format=%an
输出：
IvanLi(END)
这里的输出是一个read界面，可以用一个变量来存储结果，方便后面做其他使用：
author=$(git show -s --format=%an)
echo $author
输出：
Ivan Li
--format的更多格式化格式，参加PRETTY FORMATS，copy如下：
The placeholders are:
'%H': commit hash
'%h': abbreviated commit hash
'%T': tree hash
'%t': abbreviated tree hash
'%P': parent hashes
'%p': abbreviated parent hashes
'%an': author name
'%aN': author name (respecting .mailmap, seegit-shortlog[1]orgit-blame[1])
'%ae': author email
'%aE': author email (respecting .mailmap, seegit-shortlog[1]orgit-blame[1])
'%ad': author date (format respects --date= option)
'%aD': author date, RFC2822 style
'%ar': author date, relative
'%at': author date, UNIX timestamp
'%ai': author date, ISO 8601-like format
'%aI': author date, strict ISO 8601 format
'%cn': committer name
'%cN': committer name (respecting .mailmap, seegit-shortlog[1]orgit-blame[1])
'%ce': committer email
'%cE': committer email (respecting .mailmap, seegit-shortlog[1]orgit-blame[1])
'%cd': committer date (format respects --date= option)
'%cD': committer date, RFC2822 style
'%cr': committer date, relative
'%ct': committer date, UNIX timestamp
'%ci': committer date, ISO 8601-like format
'%cI': committer date, strict ISO 8601 format
'%d': ref names, like the --decorate option ofgit-log[1]
'%D': ref names without the " (", ")" wrapping.
'%S': ref name given on the command line by which the commit was reached (likegit log --source), only works withgit log
'%e': encoding
'%s': subject
'%f': sanitized subject line, suitable for a filename
'%b': body
'%B': raw body (unwrapped subject and body)
'%N': commit notes
'%GG': raw verification message from GPG for a signed commit
'%G?': show "G" for a good (valid) signature, "B" for a bad signature, "U" for a good signature with unknown validity, "X" for a good signature that has expired, "Y" for a good signature made by an expired key, "R" for a good signature made by a revoked key, "E" if the signature cannot be checked (e.g. missing key) and "N" for no signature
'%GS': show the name of the signer for a signed commit
'%GK': show the key used to sign a signed commit
'%GF': show the fingerprint of the key used to sign a signed commit
'%GP': show the fingerprint of the primary key whose subkey was used to sign a signed commit
'%gD': reflog selector, e.g.,refs/stash@{1}orrefs/stash@{2 minutes ago}; the format follows the rules described for the-goption. The portion before the@is the refname as given on the command line (sogit log -g refs/heads/masterwould yieldrefs/heads/master@{0}).
'%gd': shortened reflog selector; same as%gD, but the refname portion is shortened for human readability (sorefs/heads/masterbecomes justmaster).
'%gn': reflog identity name
'%gN': reflog identity name (respecting .mailmap, seegit-shortlog[1]orgit-blame[1])
'%ge': reflog identity email
'%gE': reflog identity email (respecting .mailmap, seegit-shortlog[1]orgit-blame[1])
'%gs': reflog subject
'%Cred': switch color to red
'%Cgreen': switch color to green
'%Cblue': switch color to blue
'%Creset': reset color
'%C(…)': color specification, as described under Values in the "CONFIGURATION FILE" section ofgit-config[1]. By default, colors are shown only when enabled for log output (bycolor.diff,color.ui, or--color, and respecting theautosettings of the former if we are going to a terminal).%C(auto,…)is accepted as a historical synonym for the default (e.g.,%C(auto,red)). Specifying%C(always,…)will show the colors even when color is not otherwise enabled (though consider just using--color=alwaysto enable color for the whole output, including this format and anything else git might color).autoalone (i.e.%C(auto)) will turn on auto coloring on the next placeholders until the color is switched again.
'%m': left (<), right (>) or boundary (-) mark
'%n': newline
'%%': a raw '%'
'%x00': print a byte from a hex code
'%w([[,[,]]])': switch line wrapping, like the -w option ofgit-shortlog[1].
'%<(<N>[,trunc|ltrunc|mtrunc])': make the next placeholder take at least N columns, padding spaces on the right if necessary. Optionally truncate at the beginning (ltrunc), the middle (mtrunc) or the end (trunc) if the output is longer than N columns. Note that truncating only works correctly with N >= 2.
'%<|(<N>)': make the next placeholder take at least until Nth columns, padding spaces on the right if necessary
'%>(<N>)', '%>|(<N>)': similar to '%<(<N>)', '%<|(<N>)' respectively, but padding spaces on the left
'%>>(<N>)', '%>>|(<N>)': similar to '%>(<N>)', '%>|(<N>)' respectively, except that if the next placeholder takes more spaces than given and there are spaces on its left, use those spaces
'%><(<N>)', '%><|(<N>)': similar to '%<(<N>)', '%<|(<N>)' respectively, but padding both sides (i.e. the text is centered)
%(trailers[:options]): display the trailers of the body as interpreted bygit-interpret-trailers[1]. Thetrailersstring may be followed by a colon and zero or more comma-separated options. If theonlyoption is given, omit non-trailer lines from the trailer block. If theunfoldoption is given, behave as if interpret-trailer’s--unfoldoption was given. E.g.,%(trailers:only,unfold)to do both.
