[PATCH] git-gui: add mingw specific startup wrapper

[Steffen Prohaska <prohaska@zib.de>]

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.

Signed-off-by: Steffen Prohaska <prohaska@zib.de>
---
 git-gui/Makefile           |   14 ++++++++++++++
 git-gui/windows/git-gui.sh |   16 ++++++++++++++++
 2 files changed, 30 insertions(+), 0 deletions(-)
 create mode 100644 git-gui/windows/git-gui.sh


diff --git a/git-gui/Makefile b/git-gui/Makefile
index c805450..8cf04d0 100644
--- a/git-gui/Makefile
+++ b/git-gui/Makefile
@@ -128,6 +128,7 @@ ifeq ($(uname_S),Darwin)
 endif
 ifneq (,$(findstring MINGW,$(uname_S)))
 	NO_MSGFMT=1
+	GITGUI_WINDOWS_WRAPPER := YesPlease
 endif
 
 ifdef GITGUI_MACOSXAPP
@@ -168,6 +169,13 @@ Git\ Gui.app: GIT-VERSION-FILE GIT-GUI-VARS \
 	mv '$@'+ '$@'
 endif
 
+ifdef GITGUI_WINDOWS_WRAPPER
+GITGUI_MAIN := git-gui.tcl
+
+git-gui: windows/git-gui.sh
+	cp $< $@
+endif
+
 $(GITGUI_MAIN): git-gui.sh GIT-VERSION-FILE GIT-GUI-VARS
 	$(QUIET_GEN)rm -f $@ $@+ && \
 	sed -e '1s|#!.*/sh|#!$(SHELL_PATH_SQ)|' \
@@ -233,6 +241,9 @@ GIT-GUI-VARS: .FORCE-GIT-GUI-VARS
 ifdef GITGUI_MACOSXAPP
 all:: git-gui Git\ Gui.app
 endif
+ifdef GITGUI_WINDOWS_WRAPPER
+all:: git-gui
+endif
 all:: $(GITGUI_MAIN) lib/tclIndex $(ALL_MSGFILES)
 
 install: all
@@ -246,6 +257,9 @@ ifdef GITGUI_MACOSXAPP
 	$(QUIET)$(INSTALL_A0)'Git Gui.app' $(INSTALL_A1) '$(DESTDIR_SQ)$(libdir_SQ)'
 	$(QUIET)$(INSTALL_X0)git-gui.tcl $(INSTALL_X1) '$(DESTDIR_SQ)$(libdir_SQ)'
 endif
+ifdef GITGUI_WINDOWS_WRAPPER
+	$(QUIET)$(INSTALL_X0)git-gui.tcl $(INSTALL_X1) '$(DESTDIR_SQ)$(libdir_SQ)'
+endif
 	$(QUIET)$(foreach p,$(ALL_LIBFILES), $(INSTALL_R0)$p $(INSTALL_R1) '$(DESTDIR_SQ)$(libdir_SQ)' &&) true
 	$(QUIET)$(INSTALL_D0)'$(DESTDIR_SQ)$(msgsdir_SQ)' $(INSTALL_D1)
 	$(QUIET)$(foreach p,$(ALL_MSGFILES), $(INSTALL_R0)$p $(INSTALL_R1) '$(DESTDIR_SQ)$(msgsdir_SQ)' &&) true
diff --git a/git-gui/windows/git-gui.sh b/git-gui/windows/git-gui.sh
new file mode 100644
index 0000000..98f32c0
--- /dev/null
+++ b/git-gui/windows/git-gui.sh
@@ -0,0 +1,16 @@
+#!/bin/sh
+# Tcl ignores the next line -*- tcl -*- \
+exec wish "$0" -- "$@"
+
+if { $argc >=2 && [lindex $argv 0] == "--working-dir" } {
+	cd [lindex $argv 1]
+	set argv [lrange $argv 2 end]
+	incr argc -2
+}
+
+set gitguidir [file dirname [info script]]
+regsub -all ";" $gitguidir "\\;" gitguidir
+set env(PATH) "$gitguidir;$env(PATH)"
+unset gitguidir
+
+source [file join [file dirname [info script]] git-gui.tcl]
-- 
1.5.3.mingw.1.105.gf0c04