问题
My .gitignore file seems to be working unpredictably. Here is an example:
I make a new repo foo with a file bar.txt, which I want to ignore:
pon2@kann4:~$ mkdir foo
pon2@kann4:~$ cd foo/
pon2@kann4:~/foo$ touch bar.txt
pon2@kann4:~/foo$ git init
Initialized empty Git repository in /home/pon2/foo/.git/
pon2@kann4:~/foo$ git status
# On branch master
#
# Initial commit
#
# Untracked files:
# (use "git add <file>..." to include in what will be committed)
#
# bar.txt
nothing added to commit but untracked files present (use "git add" to track)
As expected, bar.txt shows up as untracked. So I tell git to ignore .txts, but I accidentally add some trailing whitespace:
pon2@kann4:~/foo$ echo "*.txt " > .gitignore
Now when I check the repo status, git doesn't ignore bar.txt:
pon2@kann4:~/foo$ git status
# On branch master
#
# Initial commit
#
# Untracked files:
# (use "git add <file>..." to include in what will be committed)
#
# .gitignore
# bar.txt
nothing added to commit but untracked files present (use "git add" to track)
What's going on?
回答1:
This changed in git 2.0. From the release notes:
Trailing whitespaces in .gitignore files, unless they are quoted for
fnmatch(3), e.g."path\ ", are warned and ignored. Strictly speaking, this is a backward-incompatible change, but very unlikely to bite any sane user and adjusting should be obvious and easy.
回答2:
.gitignore is whitespace sensitive. If you include trailing whitespace, git won't recognize your files.
In this line there's a trailing space:
pon2@kann4:~/foo$ echo "*.txt " > .gitignore
Once we fix that:
pon2@kann4:~/foo$ echo "*.txt" > .gitignore
The issue resolves:
pon2@kann4:~/foo$ git status
# On branch master
#
# Initial commit
#
# Untracked files:
# (use "git add <file>..." to include in what will be committed)
#
# .gitignore
nothing added to commit but untracked files present (use "git add" to track)
pon2@kann4:~/foo$
来源：https://stackoverflow.com/questions/8422045/gitignore-is-whitespace-sensitive