Re: Why does git track directory listed in .gitignore/".git/info/exclude"?

2 messages, 2 authors, 2016-06-15 · open the first message on its own page

Re: Why does git track directory listed in .gitignore/".git/info/exclude"?

From: Junio C Hamano <hidden>
Date: 2016-06-15 22:44:09

Adam Piatyszek [off-list ref] writes:
In my opinion, the exclude matching routine should convert "dir/" to
"dir", especially that the "git status" command lists untracked
directories with the trailing slash "/", e.g:

  ediap@lespaul ~/git/acm_ofdm $ git status
  # On branch master
  # Untracked files:
  #   (use "git add <file>..." to include in what will be committed)
  #
  #       ldpc13.bm
  #       results/

So, most newbies will try to add "dir/" to .gitignore or
.git/info/exclude instead of "dir" in such a case.

Can you seen any drawbacks of such modification?
I do not see a problem if you are saying:

	when the user has an entry 'dir/' in .gitignore, it
	should match directory 'dir'.

However, there is a subtle problem in a naive implementation of
that.  IOW,

	when the user has an entry 'dir/' in .gitignore, behave
	as if the entry were 'dir' instead.

is wrong.

When you say "foo", you mean "I want either 'foo' that is a
non-directory, or everything under 'foo' if that is a
directory".  When you say "foo/", you are saying "I do not want
'foo' if it is a non-directory.  I want everything under 'foo'
if and only if that is a directory".  Compare:

	git ls-files -s Makefile/
        git ls-files -s Makefile

The first one is silent, and the latter answers.  On the other
hand, for a directory, both of these give you the same:

	git ls-files Documentation/
        git ls-files Documentation

Re: Why does git track directory listed in .gitignore/".git/info/exclude"?

From: Adam Piatyszek <hidden>
Date: 2016-06-15 22:44:09

Hi Junio,

* Junio C Hamano [30 I 2008 21:39]:
When you say "foo", you mean "I want either 'foo' that is a
non-directory, or everything under 'foo' if that is a
directory".  When you say "foo/", you are saying "I do not want
'foo' if it is a non-directory.  I want everything under 'foo'
if and only if that is a directory".  Compare:

	git ls-files -s Makefile/
        git ls-files -s Makefile

The first one is silent, and the latter answers.  On the other
hand, for a directory, both of these give you the same:

	git ls-files Documentation/
        git ls-files Documentation
As you said above both "Documentation/" and "Documentation" match the 
existing tracked directory named "Documentation". That is how ls-files 
works and it is the only sane way. The problem is that I expect that 
directory entries ending with "/" in .gitignore and .git/info/exclude 
files are treated in a similar way, i.e. they are being _ignored_ with 
all the stuff in them, in the same way as directory entries without the 
ending slash. Unfortunately this is not the case. See this example:

ediap@lespaul ~/tmp $ mkdir repo && cd repo
ediap@lespaul ~/tmp/repo $ git init
Initialized empty Git repository in .git/
ediap@lespaul ~/tmp/repo $ touch a.txt
ediap@lespaul ~/tmp/repo $ git add a.txt
ediap@lespaul ~/tmp/repo $ git commit -m "a file"
Created initial commit 1712595: a file
  0 files changed, 0 insertions(+), 0 deletions(-)
  create mode 100644 a.txt
ediap@lespaul ~/tmp/repo $ mkdir d
ediap@lespaul ~/tmp/repo $ touch d/b.txt
ediap@lespaul ~/tmp/repo $ git status
# On branch master
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#       d/
nothing added to commit but untracked files present (use "git add" to track)
ediap@lespaul ~/tmp/repo $ echo "d/" > .gitignore
ediap@lespaul ~/tmp/repo $ git add .gitignore
ediap@lespaul ~/tmp/repo $ git commit -m "ignore"
Created commit 29ebf4d: ignore
  1 files changed, 1 insertions(+), 0 deletions(-)
  create mode 100644 .gitignore
ediap@lespaul ~/tmp/repo $ git status
# On branch master
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#       d/
nothing added to commit but untracked files present (use "git add" to track)


But:

ediap@lespaul ~/tmp/repo $ echo "d" > .gitignore
ediap@lespaul ~/tmp/repo $ git add .gitignore
ediap@lespaul ~/tmp/repo $ git commit --amend -m "ignore"
Created commit 43198d4: ignore
  1 files changed, 1 insertions(+), 0 deletions(-)
  create mode 100644 .gitignore
ediap@lespaul ~/tmp/repo $ git status
# On branch master
nothing to commit (working directory clean)


I hope you now understand what I was trying to express in my previous 
email. :-)

BR,
/Adam


-- 
.:.  Adam Piatyszek (ediap)  .:.....................................:.
.:.  ediap@users.sourceforge.net  .:................................:.
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help