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The 'clean' target is noticeably slow on cygwin, even for a 'do-nothing'
invocation of 'make clean'. For example, the second 'make clean' given
below:
$ make clean >/dev/null 2>&1
$ make clean
GITGUI_VERSION = 0.21.0.85.g3e5c
rm -rf git-gui lib/tclIndex po/*.msg
rm -rf GIT-VERSION-FILE GIT-GUI-VARS
$
has been timed at 1.934s on my laptop (an old core i5-4200M @ 2.50GHz,
8GB RAM, 1TB HDD).
Notice that the Makefile, as part of processing the 'clean' target, is
updating the 'GIT-VERSION-FILE' file. This is to ensure that the
$(GITGUI_VERSION) make variable is set, once that file had been included.
However, the 'clean' target does not use the $(GITGUI_VERSION) variable,
so this is wasted effort.
In order to eliminate such wasted effort, use the value of the internal
$(MAKECMDGOALS) variable to only '-include GIT-VERSION-FILE' when the
target is not 'clean'. (This drops the time down to 0.676s, on my laptop,
giving an improvement of 65.05%).
Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Pratyush Yadav <me@yadavpratyush.com>
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'jn/reproducible-build', 'ls/no-double-utf8-author-name', 'js/misc-git-gui-stuff', 'bb/ssh-key-files', 'bp/bind-kp-enter', 'cb/ttk-style' and 'py/call-do-quit-before-exit' of ../git into py/git-git-extra-stuff
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auto_mkindex expands wildcards in directory order, which depends on
the underlying filesystem. To improve build reproducibility, sort the
list of *.tcl files in the Makefile.
The unoptimized loading case was previously fixed in gitgui-0.21.0~14
(git-gui: sort entries in tclIndex, 2015-01-26).
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When Git for Windows was still based on MSys1, we had no gettext, ergo
no msgfmt, either. Therefore, we introduced a small and simple Tcl
script to perform the same task.
However, with MSys2, we no longer need that because we have a proper
msgfmt executable. Plus, the po2msg.sh script somehow manages to hang
when run in parallel in Git for Windows' SDK (symptom: the Continuous
Testing tasks timing out).
Two reasons to use real msgfmt.exe instead.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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ALL_LIBFILES uses wildcard, which provides the result in directory
order. This order depends on the underlying filesystem on the
buildhost. To get reproducible builds it is required to sort such list
before using them.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>
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Introduce the GIT_GUI_LIB_DIR environment variable, to tell git-gui
where to look for TCL libs. This allows a git-gui which has been
built with a prefix of /foo to be run out of directory /bar. This is
the equivalent of GIT_EXEC_PATH or GITPERLLIB but for git-gui's TCL
libraries.
Signed-off-by: David Turner <dturner@twitter.com>
Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>
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Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>
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This is clearer to many people this way.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>
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The textconv filters may include multiple arguments and may make use
of unix shell features. To maintain compatibility with 'git blame'
ensure these commands are passed through bash.
Reported-by: Kirill Smelkov <kirr@landau.phys.spbu.ru>
Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>
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Providing multiple targets to force a rebuild is unnecessary
complication.
Avoid using a name that could conflict with future special
targets in GNU make (a leading period followed by uppercase
letters).
Cc: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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- detect more Tk.framework variants
- fix apple menu setup, use native preferences menu item
- don't set menu font
Signed-off-by: Daniel A. Steffen <das@users.sourceforge.net>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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OpenSSH allows specifying an external program to use
for direct user interaction. While most Linux systems
already have such programs, some environments, for
instance, msysgit, lack it. This patch adds a simple
fallback Tcl implementation of the tool.
In msysgit it is also necessary to set a fake value of
the DISPLAY variable, because otherwise ssh won't even
try to use SSH_ASKPASS handlers.
Signed-off-by: Alexander Gavrilov <angavrilov@gmail.com>
Acked-by: Johannes Sixt <johannes.sixt@telecom.at>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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Instead of using an absolute path, git-gui can discover its
gui library using a relative path from execdir. We want to
use the relative path discovery on MinGW to avoid issues
with translation of absolute paths.
Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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We always wanted the library for git-gui to install into the
$prefix/share directory, not $prefix/libexec/share. All of
the files in our library are platform independent and may
be reused across systems, like any other content stored in
the share directory.
Our computation of where our library should install to was broken
when git itself started installing to $prefix/libexec/git-core,
which was one level down from where we expected it to be.
Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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To prepare msg files for Tcl scripts, the command that is set to MSGFMT
make variable needs to be able to grok "--tcl -l <lang> -d <here>" options
correctly. This patch simplifies the tests done in git-gui's Makefile to
directly test this condition. If the test run does not exit properly with
zero status (either because you do not have "msgfmt" itself, or your
"msgfmt" is too old to grok --tcl option --- the reason does not matter),
have it fall back to po/po2msg.sh
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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Mac OS X Tiger may have a msgfmt available but it doesn't understand
how to implement --tcl. Falling back to po2msg.sh on such systems
is a reasonable behavior.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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When we are being built by the Cygwin package maintainers we need to
embed the POSIX path to our library files and not the Windows path.
Embedding the Windows path means all end-users who install our Cygwin
package would be required to install Cygwin at the same Windows path
as the package maintainer had Cygwin installed to. This requirement
is simply not user-friendly and may be infeasible for a large number
of our users.
We now try to auto-detect if the Tcl/Tk binary we will use at runtime
is capable of translating POSIX paths into Windows paths the same way
that cygpath does the translations. If the Tcl/Tk binary gives us the
same results then it understands the Cygwin path translation process
and should be able to read our library files from a POSIX path name.
If it does not give us the same answer as cygpath then the Tcl/Tk
binary might actually be a native Win32 build (one that is not
linked against Cygwin) and thus requires the native Windows path
to our library files. We can assume this is not a Cygwin package
as the Cygwin maintainers do not currently ship a pure Win32 build
of Tcl/Tk.
Reported on the git mailing list by Jurko Gospodnetić.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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Most users set TCLTK_PATH to tell git-gui where to find wish, but they
fail to set TCL_PATH to the same Tcl installation. We use the non-GUI
tclsh during builds so headless systems are still able to create an
index file and create message files without GNU msgfmt. So it matters
to us that we find a working TCL_PATH at build time.
If TCL_PATH hasn't been set yet we can take a better guess about what
tclsh executable to use by replacing 'wish' in the executable path with
'tclsh'. We only do this replacement on the filename part of the path,
just in case the string "wish" appears in the directory paths. Most of
the time the tclsh will be installed alongside wish so this replacement
is a sensible and safe default.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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The Tk Framework moved its location in 10.5 compared to 10.4
Signed-off-by: Jay Soffian <jaysoffian@gmail.com>
Tested-by: Seth Falcon <seth@userprimary.net>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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In the multiple message case we remove the word "messages" from the
statistics output of msgfmt as it looks cleaner on the tty when you
are watching the build process. However we failed to strip the word
"message" when only 1 message was found to be untranslated or fuzzy,
as msgfmt does not produce the 's' suffix.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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If msgfmt fails with exit code 127 that typically means the program
is not found in the user's PATH and thus cannot be executed by make.
In such a case we can try to fallback to the Tcl based po2msg program
that we distributed with git-gui, as it does a "good enough" job.
We still don't default to po2msg.sh however as it does not perform
a lot of the sanity checks that msgfmt does, and quite a few of
those are too useful to give up.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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gg_libdir is converted to an absolute Windows path on Cygwin,
but a later step attempts to prefix $DESTDIR to install to a
staging directory. Explicitly separate the uses of gg_libdir for
these two purposes so installation to $DESTDIR will work.
Signed-off-by: Mark Levedahl <mdl123@verizon.net>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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The mapping of Windows vs Cygwin/Posix paths is arbitrary and not knowable
from the Posix side, so logic to determine whether to use relative paths
to locate the git-gui library just does not work on Cygwin. Fix this to
unconditionally use absolute path on Cygwin. (This fixes a regression
from 1.5.4).
Signed-off-by: Mark Levedahl <mdl123@verizon.net>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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The install-sh script as shipped with automake requires a space between
the -m switch and its argument. Since this is also the regular way of
doing it with other install implementations this change inserts the
missing space.
Signed-off-by: Robert Schiele <rschiele@gmail.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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Any program using getopt or getopt_long will stop processing options
once a non-option argument has been encountered, if POSIXLY_CORRECT is
set. Therefore, reorder the command-line arguments to put options
first, so that the msgfmt call works in this scenario.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.ath.cx>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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I keep forgetting to include TCLTK_PATH when I build git-gui on some
systems. Placing that rule (among others) into a config.mak makes it
easier to compile the application the same way every time.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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On Windows its better to use a shortcut (.lnk file) over a batch
script (.bat) as we can specify the icon file for the .lnk and
thus have these git specific objects appear on the desktop with
that git specific icon file.
Unfortunately the authors of Tcl did not bless us with the APIs
needed to create shortcuts from within Tcl. But Microsoft did
give us Windows Scripting Host which allows us to execute some
JavaScript that calls some sort of COM object that can operate
on a .lnk file.
We now build both Cygwin and non-Cygwin "desktop icons" as proper
Windows .lnk files, using the "Start in" property of these files
to indicate the working directory of the repository the user wants
to launch.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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The wrapper adds the directory it is installed in to PATH.
This is required for the git commands implemented in shell.
git-gui fails to launch them if PATH is not modified.
The wrapper script also accepts an optional command line
switch '--working-dir <dir>' and changes to <dir> before
launching the actual git-gui. This is required to implement
the "Git Gui Here" Explorer shell extension.
As a last step the original git-gui script is launched,
which is expected to be located in the same directory
under the name git-gui.tcl.
Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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Shawn's git-gui Makefile supports the pure tcl replacement
for msgfmt if setting NO_MSGFMT. This patch sets the NO_MSGFMT
for msysgit.
Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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If we are building on Darwin (sometimes known as Mac OS X) and we
find the Mac OS X Tk.framework in the expected location we build
a proper Mac OS X application bundle with icons and info list. The
git-gui and git-citool commands are modified to be very short shell
scripts that just execute the application bundle, starting Tk with
our own info list and icon set.
Although the Makefile change here is rather large it makes for a
much more pleasant user experience on Mac OS X as git-gui now has
its own icon on the dock, in the standard tk_messageBox dialogs,
and the application name now says "Git Gui" instead of "Wish" in
locations such as the menu bar and the alt-tab window.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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Rather than displaying the stock red "Tk" icon in our window
title bars and on the task bar we now show a Git specific logo.
This is Henrik Nyh's logo that we also use in the startup wizard,
scaled to a 16x16 image for Windows task bar usage with a proper
transparent background.
Signed-off-by: Shawn O. Pearce <shawn.o.pearce@bankofamerica.com>
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The program "msgfmt" was our only dependency on gettext. Since it
is more than just a hassle to compile gettext on MinGW, here is a
(very simple) drop-in replacement, which Works For Us.
[sp: Changed Makefile to enable/disable po2msg.sh by the new
NO_MSGFMT variable.]
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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Cygwin has been stuck on the 8.4.1 version of Tcl/Tk for quite some
time, even though the main Tcl/Tk distribution is already shipping
an 8.4.15. The problem is Tcl/Tk no longer supports Cygwin so
apparently building the package for Cygwin is now a non-trivial task.
Its actually quite easy to build the native Win32 version of Tcl/Tk
by compiling with the -mno-cygwin flag passed to GCC but this means
we lose all of the "fancy" Cygwin path translations that the Tcl
library was doing for us. This is particularly an issue when we
are trying to start git-gui through the git wrapper as the git
wrapper is passing off a Cygwin path for $0 and Tcl cannot find
the startup script or the library directory.
We now use `cygpath -m -a` to convert the UNIX style paths to Windows
style paths in our startup script if we are building on Cygwin.
Doing so allows either the Cygwin-ized Tcl/Tk 8.4.1 that comes with
Cygwin or a manually built 8.4.15 that is running the pure Win32
implementation to read our script.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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* maint:
git-gui: Paper bag fix "Commit->Revert" format arguments
git-gui: Provide 'uninstall' Makefile target to undo an installation
git-gui: Font chooser to handle a large number of font families
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Several users have requested a "make uninstall" target be provided
in the stock git-gui Makefile so that they can undo an install
if git-gui goes to the wrong place during the initial install,
or if they are unhappy with the tool and want to remove it from
their system.
We currently assume that the complete set of files we need to delete
are those defined by our Makefile and current source directory.
This could differ from what the user actually has installed if they
installed one version then attempt to use another to perform the
uninstall. Right now I'm just going to say that is "pilot error".
Users should uninstall git-gui using the same version of source
that they used to make the installation. Perhaps in the future we
could read tclIndex and base our uninstall decisions on its contents.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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* maint:
git-gui: Avoid use of libdir in Makefile
git-gui: Disable Tk send in all git-gui sessions
git-gui: lib/index.tcl: handle files with % in the filename properly
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Dmitry V. Levin pointed out that on GNU linux libdir is often used
in Makefiles to mean "/usr/lib" or "/usr/lib64", a directory that
is meant to hold platform-specific binary files. Using a different
libdir meaning here in git-gui's Makefile breaks idomatic expressions
like rpm specifile "make libdir=%_libdir".
Originally I asked that the git.git Makefile undefine libdir before
it calls git-gui's own Makefile but it turns out this is very hard
to do, if not impossible. Renaming our libdir to gg_libdir resolves
this case with a minimum amount of fuss on our part.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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If we have a failure executing msgfmt (such as the process just
crashes no matter what arguments you supply it because its own
installation is borked) we should stop the build process rather
than letting it continue along its merry way as if the .msg files
were created.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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I really prefer having a very short and sweet makefile output that
does not flood the user's screen with a ton of commands that they
don't care much about. Traditionally git-gui has hidden away the
actual commands from output by the $(QUIET*) series of macros but
allow them to be seen with either `make QUIET=` or `make V=1`.
This change makes our i18n message generation process to be a lot
shorter and easier to digest at a glance:
GITGUI_VERSION = 0.8.2.19.gb868-dirty
* new locations or Tcl/Tk interpreter
GEN git-gui
BUILTIN git-citool
INDEX lib/
MSGFMT po/de.msg 268 translated.
MSGFMT po/hu.msg 268 translated.
MSGFMT po/it.msg 268 translated.
MSGFMT po/ja.msg 268 translated.
MSGFMT po/ru.msg 249 translated, 12 fuzzy, 4 untranslated.
MSGFMT po/zh_cn.msg 60 translated, 37 fuzzy, 168 untranslated.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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[jes: with fixes by the i18n team.]
Signed-off-by: Christian Stimming <stimming@tuhh.de>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
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* maint:
git-gui: Don't require a .pvcsrc to create Tools/Migrate menu hack
git-gui: Don't nice git blame on MSYS as nice is not supported
git-gui: Don't require $DISPLAY just to get --version
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Junio asked that we don't force the user to have a valid X11 server
configured in $DISPLAY just to obtain the output of `git gui version`.
This makes sense, the user may be an automated tool that is running
without an X server available to it, such as a build script or other
sort of package management system. Or it might just be a user working
in a non-GUI environment and wondering "what version of git-gui do I
have installed?".
Tcl has a lot of warts, but one of its better ones is that a comment
can be continued to the next line by escaping the LF that would have
ended the comment using a backslash-LF sequence. In the past we have
used this trick to escape away the 'exec wish' that is actually a Bourne
shell script and keep Tcl from executing it.
I'm using that feature here to comment out the Bourne shell script and
hide it from the Tcl engine. Except now our Bourne shell script is a
few lines long and checks to see if it should print the version, or not.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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* maint:
git-gui: Bind Tab/Shift-Tab to cycle between panes in blame
git-gui: Correctly install to /usr/bin on Cygwin
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Alex Riesen wanted a quieter installation process for git and its
contained git-gui. His earlier patch to do this failed to work
properly when V=1, and didn't really give a great indication of
what the installation was doing.
These rules are a little bit on the messy side, as each of our
install actions is composed of at least two variables, but in the
V=1 case the text is identical to what we had before, while in the
non-V=1 case we use some more complex rules to show the interesting
details, and hide the less interesting bits.
We now can also set QUIET= (nothing) to see the rules that are used
when V= (nothing), so we can debug those too if we have to. This is
actually a side-effect of how we insert the @ into the rules we use
for the "lists of things", like our builtins or our library files.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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Mark Levedahl <mlevedahl@gmail.com> noted that installation on Cygwin
to /usr/bin can cause problems with the automatic guessing of our
library location. The problem is that installation to /usr/bin
means we actually have:
/usr/bin = c:\cygwin\bin
/usr/share = c:\cygwin\usr\share
So git-gui guesses that its library should be found within the
c:\cygwin\share directory, as that is where it should be relative
to the script itself in c:\cygwin\bin.
In my first version of this patch I tried to use `cygpath` to resolve
/usr/bin and /usr/share to test that they were in the same relative
locations, but that didn't work out correctly as we were actually
testing /usr/share against itself, so it always was equal, and we
always used relative paths. So my original solution was quite wrong.
Mark suggested we just always disable relative behavior on Cygwin,
because of the complexity of the mount mapping problem, so that's
all I'm doing.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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This reverts commit c289f6fa1f8642a5caf728ef8ff87afd5718cd99.
Junio pointed out that Alex's change breaks in some cases, like
when V=1, and is more verbose than it should be even if that worked.
I'm backing it out and redoing it.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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Johannes Sixt asked me to try to avoid embedding the runtime location
of git-gui's library directory in the executable script. Not embedding
it helps the MinGW to be relocatable to another directory should a user
wish to install the programs in a directory other than the location the
packager wanted them to be installed into.
Most of this is a hack. We try to determine if the path of our master
git-gui script will be able to locate the lib by ../share/git-gui/lib.
This should be true if $(gitexecdir) and $(libdir) have the same prefix.
If they do then we defer the assignment of $(libdir) until runtime, and
we get it from $argv0 rather than embedding it into the script itself.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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Petr Baudis pointed out the main git.git repository's Makefile dies
now if git-gui 0.7.0-rc1 or later is being used and TCL_PATH was not
set to a working tclsh program path. This breaks people who may have
a working build configuration today and suddenly upgrade to the latest
git release.
The tclIndex is required for git-gui to load its associated lib files,
but using the Tcl auto_load procedure to source only the files we need
is a performance optimization. We can emulate the auto_load by just
source'ing every file in that directory, assuming we source class.tcl
first to initialize our crude class system.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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As most of the git-gui interface is based upon "meta-widgets"
that need to carry around a good deal of state (e.g. console
windows, browser windows, blame viewer) we have a good deal
of messy code that tries to store this meta-widget state in
global arrays, where keys into the array are formed from a
union of a unique "object instance id" and the field name.
This is a simple class system for Tcl that allows us to
hide much of that mess by making Tcl do what it does best;
process strings to manipulate its own code during startup.
Each object instance is placed into its own namespace. The
namespace is created when the object instance is created and
the namespace is destroyed when the object instance is removed
from the system. Within that namespace we place variables for
each field within the class; these variables can themselves be
scalar values or full-blown Tcl arrays.
A simple class might be defined as:
class map {
field data
field size 0
constructor {} {
return $this
}
method set {name value} {
set data($name) $value
incr size
}
method size {} {
return $size
} ifdeleted { return 0 }
}
All fields must be declared before any constructors or methods. This
allows our class to generate a list of the fields so it can properly
alter the definition of the constructor and method bodies prior to
passing them off to Tcl for definition with proc. A field may optionally
be given a default/initial value. This can only be done for non-array
type fields.
Constructors are given full access to all fields of the class, so they
can initialize the data values. The default values of fields (if any)
are set before the constructor runs, and the implicit local variable
$this is initialized to the instance identifier.
Methods are given access to fields they actually use in their body.
Every method has an implicit "this" argument inserted as its first
parameter; callers of methods must be sure they supply this value.
Some basic optimization tricks are performed (but not much). We
try to only upvar (locally bind) fields that are accessed within a
method, but we err on the side of caution and may upvar more than
we need to. If a variable is accessed only once within a method
and that access is by $foo (read) we avoid the upvar and instead
use [set foo] to obtain the value. This is slightly faster as Tcl
does not need to lookup the variable twice.
We also offer some small syntatic sugar for interacting with Tk and
the fileevent callback system in Tcl. If a field (say "foo") is used
as "@foo" we insert instead the true global variable name of that
variable into the body of the constructor or method. This allows easy
binding to Tk textvariable options, e.g.:
label $w.title -textvariable @title
Proper namespace callbacks can also be setup with the special cb proc
that is defined in each namespace. [cb _foo a] will invoke the method
_foo in the current namespace, passing it $this as the first (implied)
parameter and a as the second parameter. This makes it very simple to
connect an object instance to a -command option for a Tk widget or to
a fileevent readable or writable for a file channel.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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