软件开发中,bug就像家常便饭一样。有了bug就需要修复,在Git中,由于分支是如此的强大,所以,每个bug都可以通过一个新的临时分支来修复,修复后,合并分支,然后将临时分支删除。
当你接到一个修复一个代号101的bug的任务时,很自然地,你想创建一个分支issue-101
来修复它,但是,等等,当前正在dev
上进行的工作还没有提交:
$ git status
# On branch dev
# Changes to be committed:
# (use "git reset HEAD <file>..." to unstage)
#
# new file: hello.py
#
# Changes not staged for commit:
# (use "git add <file>..." to update what will be committed)
# (use "git checkout -- <file>..." to discard changes in working directory)
#
# modified: readme.txt
#
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并不是你不想提交,而是工作只进行到一半,还没法提交,预计完成还需1天时间。但是,必须在两个小时内修复该bug,怎么办?
幸好,Git还提供了一个stash
功能,可以把当前工作现场“储藏”起来,等以后恢复现场后继续工作:
$ git stash
Saved working directory and index state WIP on dev: 6224937 add merge
HEAD is now at 6224937 add merge
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现在,用git status
查看工作区,就是干净的(除非有没有被Git管理的文件),因此可以放心地创建分支来修复bug。
首先确定要在哪个分支上修复bug,假定需要在master
分支上修复,就从master
创建临时分支:
$ git checkout master
Switched to branch 'master'
Your branch is ahead of 'origin/master' by 6 commits.
$ git checkout -b issue- 101
Switched to a new branch 'issue-101'
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现在修复bug,需要把“Git is free software ...”改为“Git is a free software ...”,然后提交:
$ git add readme.txt
$ git commit -m "fix bug 101"
[issue- 101 cc17032] fix bug 101
1 file changed, 1 insertion(+), 1 deletion(-)
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修复完成后,切换到master
分支,并完成合并,最后删除issue-101
分支:
$ git checkout master
Switched to branch 'master'
Your branch is ahead of 'origin/master' by 2 commits.
$ git merge --no-ff -m "merged bug fix 101" issue- 101
Merge made by the 'recursive' strategy.
readme.txt | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
$ git branch -d issue- 101
Deleted branch issue- 101 (was cc17032).
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太棒了,原计划两个小时的bug修复只花了5分钟!现在,是时候接着回到dev
分支干活了!
$ git checkout dev
Switched to branch 'dev'
$ git status
# On branch dev
nothing to commit (working directory clean)
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工作区是干净的,刚才的工作现场存到哪去了?用git stash list
命令看看:
$ git stash list
stash@{ 0 }: WIP on dev: 6224937 add merge
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工作现场还在,Git把stash内容存在某个地方了,但是需要恢复一下,有两个办法:
一是用git stash apply
恢复,但是恢复后,stash内容并不删除,你需要用git stash drop
来删除;
另一种方式是用git stash pop
,恢复的同时把stash内容也删了:
$ git stash pop
# On branch dev
# Changes to be committed:
# (use "git reset HEAD <file>..." to unstage)
#
# new file: hello.py
#
# Changes not staged for commit:
# (use "git add <file>..." to update what will be committed)
# (use "git checkout -- <file>..." to discard changes in working directory)
#
# modified: readme.txt
#
Dropped refs/stash@{ 0 } (f624f8e5f082f2df2bed8a4e09c12fd2943bdd40)
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再用git stash list
查看,就看不到任何stash内容了:
你可以多次stash,恢复的时候,先用git stash list
查看,然后恢复指定的stash,用命令:
$ git stash apply stash@{ 0 }
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小结
修复bug时,我们会通过创建新的bug分支进行修复,然后合并,最后删除;
当手头工作没有完成时,先把工作现场git stash
一下,然后去修复bug,修复后,再git stash pop
,回到工作现场。