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git-gui: Guess our share/git-gui/lib path at runtime if possible

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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>
This commit is contained in:
Shawn O. Pearce 2007-05-27 00:03:37 -04:00
parent 3d5793bf52
commit ea75ee3598
2 changed files with 16 additions and 4 deletions
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12
Makefile
View file

@ -22,7 +22,7 @@ ifndef gitexecdir
endif
ifndef sharedir
sharedir := $(dir $(gitexecdir))/share
sharedir := $(dir $(gitexecdir))share
endif
ifndef INSTALL
@ -53,12 +53,19 @@ TCLTK_PATH_SQ = $(subst ','\'',$(TCLTK_PATH))
libdir ?= $(sharedir)/git-gui/lib
libdir_SQ = $(subst ','\'',$(libdir))
exedir = $(dir $(gitexecdir))share/git-gui/lib
exedir_SQ = $(subst ','\'',$(exedir))
$(patsubst %.sh,%,$(SCRIPT_SH)) : % : %.sh
$(QUIET_GEN)rm -f $@ $@+ && \
if test '$(exedir_SQ)' = '$(libdir_SQ)'; then \
GITGUI_RELATIVE=1; \
fi && \
sed -e '1s|#!.*/sh|#!$(SHELL_PATH_SQ)|' \
-e 's|^exec wish "$$0"|exec $(subst |,'\|',$(TCLTK_PATH_SQ)) "$$0"|' \
-e 's/@@GITGUI_VERSION@@/$(GITGUI_VERSION)/g' \
-e 's|@@GITGUI_LIBDIR@@|$(libdir_SQ)|' \
-e 's|@@GITGUI_RELATIVE@@|'$$GITGUI_RELATIVE'|' \
-e $$GITGUI_RELATIVE's|@@GITGUI_LIBDIR@@|$(libdir_SQ)|' \
$@.sh >$@+ && \
chmod +x $@+ && \
mv $@+ $@
@ -88,6 +95,7 @@ TRACK_VARS = \
$(subst ','\'',SHELL_PATH='$(SHELL_PATH_SQ)') \
$(subst ','\'',TCL_PATH='$(TCL_PATH_SQ)') \
$(subst ','\'',TCLTK_PATH='$(TCLTK_PATH_SQ)') \
$(subst ','\'',gitexecdir='$(gitexecdir_SQ)') \
$(subst ','\'',libdir='$(libdir_SQ)') \
#end TRACK_VARS

8
git-gui.sh
View file

@ -25,7 +25,11 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA}
## configure our library
set oguilib {@@GITGUI_LIBDIR@@}
if {[string match @@GITGUI_*@@ $oguilib]} {
set oguirel {@@GITGUI_RELATIVE@@}
if {$oguirel eq {1}} {
set oguilib [file dirname [file dirname [file normalize $argv0]]]
set oguilib [file join $oguilib share git-gui lib]
} elseif {[string match @@* $oguirel]} {
set oguilib [file join [file dirname [file normalize $argv0]] lib]
}
set idx [file join $oguilib tclIndex]
@ -55,7 +59,7 @@ if {$idx ne {}} {
} else {
set auto_path [concat [list $oguilib] $auto_path]
}
unset -nocomplain fd idx
unset -nocomplain oguilib oguirel idx fd
if {![catch {set _verbose $env(GITGUI_VERBOSE)}]} {
unset _verbose