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gitk unusable in cygwin-1.7.6-1 because tcltk-20080420-1 is native win32 app.


When I invoke gitk like this:

#####################################################
$ cygcheck -c cygwin git gitk tcltk
Cygwin Package Information
Package              Version        Status
cygwin               1.7.6-1        OK
git                  1.7.1-1        OK
gitk                 1.7.1-1        OK
tcltk                20080420-1     OK

$ ls -a
.  ..  .git

$ git rev-parse --git-dir
.git

$ gitk
#####################################################

I got the following error:

#####################################################
"Cannot find a git repository here."
#####################################################

This error message is shown when a valid .git directory is not found.

#####################################################
$ sed -n "11441,11446p" /usr/bin/gitk

# check that we can find a .git directory somewhere...
if {[catch {set gitdir [gitdir]}]} {
    show_error {} . [mc "Cannot find a git repository here."]
    exit 1
}
#####################################################

But as the "ls -a" output above shows, I do have a .git directory. So this
means the procedure "gitdir" somehow failed to detect the .git directory.

The cause of this error comes down to this:

#####################################################
$ echo "puts [pwd]"|wish
//?/PIPE
#####################################################

/usr/bin/gitk is a tcl (wish) script, but tcltk-20080420-1 is a native
Win32 app. So in cygwin-1.7.6-1, the working directory of wish is set to
//?/PIPE. That is why the git command invoked from inside gitk failed
saying "Cannot find a git repository here."

     A temporary workaround is to use cygwin-1.7.5-1, but,

1. I see a long discussion about cygwin vs. win32 CWD is taking place in
cygwin-developer. What is win32 CWD going to be in cygwin in the future?

2. I understand that the reason to have tcltk-20080420-1 as a win32 app is
to have a graphical insight that does not depend on X Window. (Thread
"Does anyone use insight on cygwin?" in cygwin 2008-08.) But in the thread
"gdb, insight, and tcltk" in cygwin 2009-10, Charles Wilson discussed War
and Peace of an X-based package. Is anything moving recently in this vein?

--
neomjp

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