git-gui: add a simple msgfmt replacement

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>

diff --git a/Makefile b/Makefile
index 6236dd6ad397e72956dfa43ec3c7add2698486a3..0ab33517a9334db5761722e75d0a4efcee26de84 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -2,6 +2,10 @@ all::
 
 # Define V=1 to have a more verbose compile.
 #
+# Define NO_MSGFMT if you do not have msgfmt from the GNU gettext
+# package and want to use our rough pure Tcl po->msg translator.
+# TCL_PATH must be vaild for this to work.
+#
 
 GIT-VERSION-FILE: .FORCE-GIT-VERSION-FILE
        @$(SHELL_PATH) ./GIT-VERSION-GEN
@@ -129,7 +133,12 @@ $(GITGUI_BUILT_INS): git-gui
        $(QUIET_BUILT_IN)rm -f $@ && ln git-gui $@
 
 XGETTEXT   ?= xgettext
-MSGFMT     ?= msgfmt
+ifdef NO_MSGFMT
+       MSGFMT ?= $(TCL_PATH) po/po2msg.sh
+else
+       MSGFMT ?= msgfmt
+endif
+
 msgsdir     = $(gg_libdir)/msgs
 msgsdir_SQ  = $(subst ','\'',$(msgsdir))
 PO_TEMPLATE = po/git-gui.pot

diff --git a/po/po2msg.sh b/po/po2msg.sh
new file mode 100644 (file)
index 0000000..da0765d
--- /dev/null
+++ b/po/po2msg.sh
@@ -0,0 +1,103 @@
+#!/bin/sh
+# Tcl ignores the next line -*- tcl -*- \
+exec tclsh "$0" -- "$@"
+
+# This is a really stupid program, which serves as an alternative to
+# msgfmt.  It _only_ translates to Tcl mode, does _not_ validate the
+# input, and does _not_ output any statistics.
+
+proc u2a {s} {
+       set res ""
+       foreach i [split $s ""] {
+               scan $i %c c
+               if {$c<128} {
+                       # escape '[', '\' and ']'
+                       if {$c == 0x5b || $c == 0x5d} {
+                               append res "\\"
+                       }
+                       append res $i
+               } else {
+                       append res \\u[format %04.4x $c]
+               }
+       }
+       return $res
+}
+
+set output_directory "."
+set lang "dummy"
+set files [list]
+
+# parse options
+for {set i 1} {$i < $argc} {incr i} {
+       set arg [lindex $argv $i]
+       if {$arg == "--statistics" || $arg == "--tcl"} {
+               continue
+       }
+       if {$arg == "-l"} {
+               incr i
+               set lang [lindex $argv $i]
+               continue
+       }
+       if {$arg == "-d"} {
+               incr i
+               set tmp [lindex $argv $i]
+               regsub "\[^/\]$" $tmp "&/" output_directory
+               continue
+       }
+       lappend files $arg
+}
+
+proc flush_msg {} {
+       global msgid msgstr mode lang out
+
+       if {![info exists msgid] || $mode == ""} {
+               return
+       }
+       set mode ""
+
+       if {$msgid == ""} {
+               set prefix "set ::msgcat::header"
+       } else {
+               set prefix "::msgcat::mcset $lang \"[u2a $msgid]\""
+       }
+
+       puts $out "$prefix \"[u2a $msgstr]\""
+}
+
+foreach file $files {
+       regsub "^.*/\(\[^/\]*\)\.po$" $file "$output_directory\\1.msg" outfile
+       set in [open $file "r"]
+       fconfigure $in -encoding utf-8
+       set out [open $outfile "w"]
+
+       set mode ""
+       while {[gets $in line] >= 0} {
+               if {[regexp "^#" $line]} {
+                       flush_msg
+                       continue
+               } elseif {[regexp "^msgid \"(.*)\"$" $line dummy match]} {
+                       flush_msg
+                       set msgid $match
+                       set mode "msgid"
+               } elseif {[regexp "^msgstr \"(.*)\"$" $line dummy match]} {
+                       set msgstr $match
+                       set mode "msgstr"
+               } elseif {$line == ""} {
+                       flush_msg
+               } elseif {[regexp "^\"(.*)\"$" $line dummy match]} {
+                       if {$mode == "msgid"} {
+                               append msgid $match
+                       } elseif {$mode == "msgstr"} {
+                               append msgstr $match
+                       } else {
+                               puts stderr "I do not know what to do: $match"
+                       }
+               } else {
+                       puts stderr "Cannot handle $line"
+               }
+       }
+       flush_msg
+       close $in
+       close $out
+}
+