git-gui: Gracefully handle bad TCL_PATH at compile time

[git.git] / Makefile

diff --git a/Makefile b/Makefile
index e73b6453d9626cad1d2f71679afc0638f464f305..ee564219c0f911025b9bf850539b87edae2d13c4 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -11,6 +11,7 @@ SCRIPT_SH = git-gui.sh
 GITGUI_BUILT_INS = git-citool
 ALL_PROGRAMS = $(GITGUI_BUILT_INS) $(patsubst %.sh,%,$(SCRIPT_SH))
 ALL_LIBFILES = $(wildcard lib/*.tcl)
+PRELOAD_FILES = lib/class.tcl
 
 ifndef SHELL_PATH
        SHELL_PATH = /bin/sh
@@ -32,6 +33,7 @@ ifndef V
        QUIET_GEN      = @echo '   ' GEN $@;
        QUIET_BUILT_IN = @echo '   ' BUILTIN $@;
        QUIET_INDEX    = @echo '   ' INDEX $(dir $@);
+       QUIET_2DEVNULL = 2>/dev/null
 endif
 
 TCL_PATH   ?= tclsh
@@ -45,6 +47,7 @@ endif
 DESTDIR_SQ = $(subst ','\'',$(DESTDIR))
 gitexecdir_SQ = $(subst ','\'',$(gitexecdir))
 SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
+TCL_PATH_SQ = $(subst ','\'',$(TCL_PATH))
 TCLTK_PATH_SQ = $(subst ','\'',$(TCLTK_PATH))
 
 libdir   ?= $(sharedir)/git-gui/lib
@@ -64,16 +67,26 @@ $(GITGUI_BUILT_INS): git-gui
        $(QUIET_BUILT_IN)rm -f $@ && ln git-gui $@
 
 lib/tclIndex: $(ALL_LIBFILES)
-       $(QUIET_INDEX)echo \
-         source lib/class.tcl \; \
+       $(QUIET_INDEX)if echo \
+         $(foreach p,$(PRELOAD_FILES),source $p\;) \
          auto_mkindex lib '*.tcl' \
-       | $(TCL_PATH)
+       | $(TCL_PATH) $(QUIET_2DEVNULL); then : ok; \
+       else \
+        echo 1>&2 "    * $(TCL_PATH) failed; using unoptimized loading"; \
+        rm -f $@ ; \
+        echo '# Autogenerated by git-gui Makefile' >$@ && \
+        echo >>$@ && \
+        $(foreach p,$(PRELOAD_FILES) $(ALL_LIBFILES),echo '$(subst lib/,,$p)' >>$@ &&) \
+        echo >>$@ ; \
+       fi
 
 # These can record GITGUI_VERSION
 $(patsubst %.sh,%,$(SCRIPT_SH)): GIT-VERSION-FILE GIT-GUI-VARS
+lib/tclIndex: GIT-GUI-VARS
 
 TRACK_VARS = \
        $(subst ','\'',SHELL_PATH='$(SHELL_PATH_SQ)') \
+       $(subst ','\'',TCL_PATH='$(TCL_PATH_SQ)') \
        $(subst ','\'',TCLTK_PATH='$(TCLTK_PATH_SQ)') \
        $(subst ','\'',libdir='$(libdir_SQ)') \
 #end TRACK_VARS