Re: git-bugreport-2021-01-06-1209.txt (git can't deal with special characters)

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Hi everyone,

Le 2021-01-06 à 18:07, Randall S. Becker a écrit :
On January 6, 2021 5:22 PM, Daniel Troger wrote:
Hi, maybe this helps you reproduce. I think I should have committed before
doing the second changes but I still got the error message and the two
names for one folder:

me@iMac:/tmp$ mkdir git_bug
me@iMac:/tmp$ cd git_bug
me@iMac:/tmp/git_bug$ git init
hint: Using 'master' as the name for the initial branch. This default branch
name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint: 	git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this
command:
hint:
hint: 	git branch -m <name>
Initialized empty Git repository in /private/tmp/git_bug/.git/
me@iMac:/tmp/git_bug$ ls -la total 8
drwxr-xr-x   4 daniel  wheel   128 Jan  6 23:13 .
drwxrwxrwt  27 root    wheel   864 Jan  6 23:13 ..
drwxr-xr-x   9 daniel  wheel   288 Jan  6 23:12 .git
-rw-r--r--@  1 daniel  staff  1283 Jan  6 23:13 paulbrunngård-springyard.zip
me@iMac:/tmp/git_bug$ unzip paulbrunngård-springyard.zip
Archive:  paulbrunngård-springyard.zip
    creating: paulbrunnga??rd-springyard/
   inflating: paulbrunnga??rd-springyard/.DS_Store
    creating: __MACOSX/
    creating: __MACOSX/paulbrunnga??rd-springyard/
   inflating: __MACOSX/paulbrunnga??rd-springyard/._.DS_Store
  extracting: paulbrunnga??rd-springyard/empty me@iMac:/tmp/git_bug$ rm
-rf __MACOSX/ *.zip me@iMac:/tmp/git_bug$ ls -la total 0
drwxr-xr-x   4 daniel  wheel  128 Jan  6 23:15 .
drwxrwxrwt  27 root    wheel  864 Jan  6 23:13 ..
drwxr-xr-x   9 daniel  wheel  288 Jan  6 23:15 .git
drwxr-xr-x@  4 daniel  wheel  128 Jan  6 12:20 paulbrunngård-springyard
me@iMac:/tmp/git_bug$ cd paulbrunngård-springyard/
me@iMac:/tmp/git_bug/paulbrunngård-springyard$ nano empty
me@iMac:/tmp/git_bug/paulbrunngård-springyard$ cat empty Initial
content me@iMac:/tmp/git_bug/paulbrunngård-springyard$ git add empty
me@iMac:/tmp/git_bug/paulbrunngård-springyard$ nano empty
me@iMac:/tmp/git_bug/paulbrunngård-springyard$ cat empty Initial
content


Line I want to keep

Line I want gone
me@iMac:/tmp/git_bug/paulbrunngård-springyard$ git restore -p .
BUG: pathspec.c:495: error initializing pathspec_item Cannot close git diff-
index --cached --numstat --summary
4b825dc642cb6eb9a060e54bf8d69288fbee4904 --
:(,prefix:27)paulbrunngård-springyard/ () at
/usr/local/Cellar/git/2.30.0/libexec/git-core/git-add--interactive line 183.
me@iMac:/tmp/git_bug/paulbrunngård-springyard$ cd ..
me@iMac:/tmp/git_bug$ git status
On branch master

No commits yet

Changes to be committed:
   (use "git rm --cached <file>..." to unstage)
	new file:   "paulbrunnga\314\212rd-springyard/empty"

Changes not staged for commit:
   (use "git add <file>..." to update what will be committed)
   (use "git restore <file>..." to discard changes in working directory)
	modified:   "paulbrunnga\314\212rd-springyard/empty"

Untracked files:
   (use "git add <file>..." to include in what will be committed)
	.DS_Store
	"paulbrunng\303\245rd-springyard/"

me@iMac:/tmp/git_bug$

Is it possible that the å character is coming from a UTF-16 encoding and is not representable in UTF-8? I'm wondering whether the name has a double-byte representation where one of the bytes is null, resulting in a truncated file name coming from readdir(). The file name would not be representable on some platforms that do not support UTF-16 path names.

I don't think that's the case (the angstrom is present in UTF-8 [1]).
I think it's another UTF-8 precomposed/decomposed bug. As far as I
was able to test it happens as soon as you have a precomposed character
in the folder name. I observed the same behaviour with a folder named
"folderü", for example. I also tried 'git -c add.interactive.usebuiltin restore -p .'
to see if the new experimental builtin add-interactive has the same problem,
and it does (though the error is less verbose).

Anyway as you show with 'git status', it's not just 'git add -p' that is
faulty, it's deeper than that, I would say.

Cheers,

Philippe.

[1] https://en.wikipedia.org/wiki/%C3%85#On_computers



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