diff --git a/.gitattributes b/.gitattributes
index 118d56c..889d582 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -4,3 +4,4 @@ git-gui.sh  encoding=UTF-8
 /po/*.po    encoding=UTF-8
 /GIT-VERSION-GEN eol=lf
 Makefile    whitespace=!indent,trail,space
+meson.build whitespace=space
diff --git a/.gitignore b/.gitignore
index 6483b21..ff6e0be 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,7 +2,7 @@
 config.mak
 Git Gui.app*
 git-gui.tcl
+GIT-GUI-BUILD-OPTIONS
 GIT-VERSION-FILE
-GIT-GUI-VARS
 git-gui
 lib/tclIndex
diff --git a/GIT-GUI-BUILD-OPTIONS.in b/GIT-GUI-BUILD-OPTIONS.in
new file mode 100644
index 0000000..5fd885c
--- /dev/null
+++ b/GIT-GUI-BUILD-OPTIONS.in
@@ -0,0 +1,7 @@
+GITGUI_GITEXECDIR=@GITGUI_GITEXECDIR@
+GITGUI_LIBDIR=@GITGUI_LIBDIR@
+GITGUI_RELATIVE=@GITGUI_RELATIVE@
+SHELL_PATH=@SHELL_PATH@
+TCLTK_PATH=@TCLTK_PATH@
+TCL_PATH=@TCL_PATH@
+TKEXECUTABLE=@TKEXECUTABLE@
diff --git a/GIT-VERSION-GEN b/GIT-VERSION-GEN
index 92373d2..ffd45c4 100755
--- a/GIT-VERSION-GEN
+++ b/GIT-VERSION-GEN
@@ -1,19 +1,33 @@
 #!/bin/sh
 
-GVF=GIT-VERSION-FILE
 DEF_VER=0.21.GITGUI
 
 LF='
 '
 
+if test "$#" -ne 2
+then
+	echo >&2 "usage: $0 <SOURCE_DIR> <OUTPUT>"
+	exit 1
+fi
+
+SOURCE_DIR="$1"
+OUTPUT="$2"
+
+# Protect us from reading Git version information outside of the Git directory
+# in case it is not a repository itself, but embedded in an unrelated
+# repository.
+GIT_CEILING_DIRECTORIES="$SOURCE_DIR/.."
+export GIT_CEILING_DIRECTORIES
+
 tree_search ()
 {
 	head=$1
 	tree=$2
-	for p in $(git rev-list --parents --max-count=1 $head 2>/dev/null)
+	for p in $(git -C "$SOURCE_DIR" rev-list --parents --max-count=1 $head 2>/dev/null)
 	do
-		test $tree = $(git rev-parse $p^{tree} 2>/dev/null) &&
-		vn=$(git describe --abbrev=4 $p 2>/dev/null) &&
+		test $tree = $(git -C "$SOURCE_DIR" rev-parse $p^{tree} 2>/dev/null) &&
+		vn=$(git -C "$SOURCE_DIR" describe --abbrev=4 $p 2>/dev/null) &&
 		case "$vn" in
 		gitgui-[0-9]*) echo $vn; break;;
 		esac
@@ -34,14 +48,14 @@ tree_search ()
 # If we are at the toplevel or the merge assumption fails
 # try looking for a gitgui-* tag.
 
-if test -f version &&
-   VN=$(cat version)
+if test -f "$SOURCE_DIR"/version &&
+   VN=$(cat "$SOURCE_DIR"/version)
 then
 	: happy
-elif prefix="$(git rev-parse --show-prefix 2>/dev/null)"
+elif prefix="$(git -C "$SOURCE_DIR" rev-parse --show-prefix 2>/dev/null)"
    test -n "$prefix" &&
-   head=$(git rev-list --max-count=1 HEAD -- . 2>/dev/null) &&
-   tree=$(git rev-parse --verify "HEAD:$prefix" 2>/dev/null) &&
+   head=$(git -C "$SOURCE_DIR" rev-list --max-count=1 HEAD -- . 2>/dev/null) &&
+   tree=$(git -C "$SOURCE_DIR" rev-parse --verify "HEAD:$prefix" 2>/dev/null) &&
    VN=$(tree_search $head $tree)
    case "$VN" in
    gitgui-[0-9]*) : happy ;;
@@ -49,7 +63,7 @@ elif prefix="$(git rev-parse --show-prefix 2>/dev/null)"
    esac
 then
 	VN=$(echo "$VN" | sed -e 's/^gitgui-//;s/-/./g');
-elif VN=$(git describe --abbrev=4 HEAD 2>/dev/null) &&
+elif VN=$(git -C "$SOURCE_DIR" describe --abbrev=4 HEAD 2>/dev/null) &&
    case "$VN" in
    gitgui-[0-9]*) : happy ;;
    *) (exit 1) ;;
@@ -60,7 +74,7 @@ else
 	VN="$DEF_VER"
 fi
 
-dirty=$(sh -c 'git diff-index --name-only HEAD' 2>/dev/null) || dirty=
+dirty=$(sh -c "git -C '$SOURCE_DIR' diff-index --name-only HEAD" 2>/dev/null) || dirty=
 case "$dirty" in
 '')
 	;;
@@ -68,13 +82,13 @@ case "$dirty" in
 	VN="$VN-dirty" ;;
 esac
 
-if test -r $GVF
+if test -r $OUTPUT
 then
-	VC=$(sed -e 's/^GITGUI_VERSION = //' <$GVF)
+	VC=$(sed -e 's/^GITGUI_VERSION=//' <$OUTPUT)
 else
 	VC=unset
 fi
 test "$VN" = "$VC" || {
-	echo >&2 "GITGUI_VERSION = $VN"
-	echo "GITGUI_VERSION = $VN" >$GVF
+	echo >&2 "GITGUI_VERSION=$VN"
+	echo "GITGUI_VERSION=$VN" >$OUTPUT
 }
diff --git a/Makefile b/Makefile
index 667c39e..3e8bd3d 100644
--- a/Makefile
+++ b/Makefile
@@ -8,10 +8,7 @@ all::
 #
 
 GIT-VERSION-FILE: FORCE
-	@$(SHELL_PATH) ./GIT-VERSION-GEN
-ifneq ($(MAKECMDGOALS),clean)
--include GIT-VERSION-FILE
-endif
+	@$(SHELL_PATH) ./GIT-VERSION-GEN . $@
 
 uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not')
 uname_O := $(shell sh -c 'uname -o 2>/dev/null || echo not')
@@ -113,7 +110,8 @@ ifeq ($(uname_S),Darwin)
 			TKFRAMEWORK = /System/Library/Frameworks/Tk.framework/Resources/Wish\ Shell.app
                 endif
         endif
-	TKEXECUTABLE = $(shell basename "$(TKFRAMEWORK)" .app)
+	TKEXECUTABLE = $(TKFRAMEWORK)/Contents/MacOS/$(shell basename "$(TKFRAMEWORK)" .app)
+	TKEXECUTABLE_SQ = $(subst ','\'',$(TKEXECUTABLE))
 endif
 
 ifeq ($(findstring $(firstword -$(MAKEFLAGS)),s),s)
@@ -127,21 +125,17 @@ gitexecdir_SQ = $(subst ','\'',$(gitexecdir))
 SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
 TCL_PATH_SQ = $(subst ','\'',$(TCL_PATH))
 TCLTK_PATH_SQ = $(subst ','\'',$(TCLTK_PATH))
-TCLTK_PATH_SED = $(subst ','\'',$(subst \,\\,$(TCLTK_PATH)))
 
 gg_libdir ?= $(sharedir)/git-gui/lib
 libdir_SQ  = $(subst ','\'',$(gg_libdir))
-libdir_SED = $(subst ','\'',$(subst \,\\,$(gg_libdir_sed_in)))
 exedir     = $(dir $(gitexecdir))share/git-gui/lib
 
-GITGUI_SCRIPT   := $$0
 GITGUI_RELATIVE :=
 GITGUI_MACOSXAPP :=
 
 ifeq ($(exedir),$(gg_libdir))
 	GITGUI_RELATIVE := 1
 endif
-gg_libdir_sed_in := $(gg_libdir)
 ifeq ($(uname_S),Darwin)
         ifeq ($(shell test -d $(TKFRAMEWORK) && echo y),y)
 		GITGUI_MACOSXAPP := YesPlease
@@ -158,41 +152,15 @@ endif
 ifdef GITGUI_MACOSXAPP
 GITGUI_MAIN := git-gui.tcl
 
-git-gui: GIT-VERSION-FILE GIT-GUI-VARS
-	$(QUIET_GEN)rm -f $@ $@+ && \
-	echo '#!$(SHELL_PATH_SQ)' >$@+ && \
-	echo 'if test "z$$*" = zversion ||' >>$@+ && \
-	echo '   test "z$$*" = z--version' >>$@+ && \
-	echo then >>$@+ && \
-	echo '	'echo \'git-gui version '$(GITGUI_VERSION)'\' >>$@+ && \
-	echo else >>$@+ && \
-	echo '	libdir="$${GIT_GUI_LIB_DIR:-$(libdir_SQ)}"' >>$@+ && \
-	echo '	'exec \"'$$libdir/Git Gui.app/Contents/MacOS/$(subst \,,$(TKEXECUTABLE))'\" \
-		'"$$0" "$$@"' >>$@+ && \
-	echo fi >>$@+ && \
-	chmod +x $@+ && \
-	mv $@+ $@
-
-Git\ Gui.app: GIT-VERSION-FILE GIT-GUI-VARS \
+git-gui: generate-macos-wrapper.sh GIT-VERSION-FILE GIT-GUI-BUILD-OPTIONS
+	$(QUIET_GEN)$(SHELL_PATH) generate-macos-wrapper.sh "$@" ./GIT-GUI-BUILD-OPTIONS ./GIT-VERSION-FILE
+
+Git\ Gui.app: GIT-VERSION-FILE GIT-GUI-BUILD-OPTIONS \
 		macosx/Info.plist \
 		macosx/git-gui.icns \
 		macosx/AppMain.tcl \
-		$(TKFRAMEWORK)/Contents/MacOS/$(TKEXECUTABLE)
-	$(QUIET_GEN)rm -rf '$@' '$@'+ && \
-	mkdir -p '$@'+/Contents/MacOS && \
-	mkdir -p '$@'+/Contents/Resources/Scripts && \
-	cp '$(subst ','\'',$(subst \,,$(TKFRAMEWORK)/Contents/MacOS/$(TKEXECUTABLE)))' \
-		'$@'+/Contents/MacOS && \
-	cp macosx/git-gui.icns '$@'+/Contents/Resources && \
-	sed -e 's/@@GITGUI_VERSION@@/$(GITGUI_VERSION)/g' \
-		-e 's/@@GITGUI_TKEXECUTABLE@@/$(TKEXECUTABLE)/g' \
-		macosx/Info.plist \
-		>'$@'+/Contents/Info.plist && \
-	sed -e 's|@@gitexecdir@@|$(gitexecdir_SQ)|' \
-		-e 's|@@GITGUI_LIBDIR@@|$(libdir_SED)|' \
-		macosx/AppMain.tcl \
-		>'$@'+/Contents/Resources/Scripts/AppMain.tcl && \
-	mv '$@'+ '$@'
+		$(TKEXECUTABLE)
+	$(QUIET_GEN)$(SHELL_PATH) generate-macos-app.sh . "$@" ./GIT-GUI-BUILD-OPTIONS ./GIT-VERSION-FILE
 endif
 
 ifdef GITGUI_WINDOWS_WRAPPER
@@ -202,18 +170,8 @@ 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)|' \
-		-e 's|@@SHELL_PATH@@|$(SHELL_PATH_SQ)|' \
-		-e '1,30s|^ argv0=$$0| argv0=$(GITGUI_SCRIPT)|' \
-		-e '1,30s|^ exec wish | exec '\''$(TCLTK_PATH_SED)'\'' |' \
-		-e 's/@@GITGUI_VERSION@@/$(GITGUI_VERSION)/g' \
-		-e 's|@@GITGUI_RELATIVE@@|$(GITGUI_RELATIVE)|' \
-		-e '$(GITGUI_RELATIVE)s|@@GITGUI_LIBDIR@@|$(libdir_SED)|' \
-		git-gui.sh >$@+ && \
-	chmod +x $@+ && \
-	mv $@+ $@
+$(GITGUI_MAIN): git-gui.sh GIT-VERSION-FILE GIT-GUI-BUILD-OPTIONS
+	$(QUIET_GEN)$(SHELL_PATH) generate-git-gui.sh "$<" "$@" ./GIT-GUI-BUILD-OPTIONS ./GIT-VERSION-FILE
 
 XGETTEXT   ?= xgettext
 ifdef NO_MSGFMT
@@ -238,35 +196,21 @@ update-po:: $(PO_TEMPLATE)
 $(ALL_MSGFILES): %.msg : %.po
 	$(QUIET_MSGFMT0)$(MSGFMT) --statistics --tcl -l $(basename $(notdir $<)) -d $(dir $@) $< $(QUIET_MSGFMT1)
 
-lib/tclIndex: $(ALL_LIBFILES) GIT-GUI-VARS
-	$(QUIET_INDEX)if echo \
-	  $(foreach p,$(PRELOAD_FILES),source $p\;) \
-	  auto_mkindex lib $(patsubst lib/%,%,$(sort $(ALL_LIBFILES))) \
-	| $(TCL_PATH) $(QUIET_2DEVNULL); then : ok; \
-	else \
-	 echo >&2 "    * $(TCL_PATH) failed; using unoptimized loading"; \
-	 rm -f $@ ; \
-	 echo '# Autogenerated by git-gui Makefile' >$@ && \
-	 echo >>$@ && \
-	 $(foreach p,$(PRELOAD_FILES) $(sort $(ALL_LIBFILES)),echo '$(subst lib/,,$p)' >>$@ &&) \
-	 echo >>$@ ; \
-	fi
-
-TRACK_VARS = \
-	$(subst ','\'',SHELL_PATH='$(SHELL_PATH_SQ)') \
-	$(subst ','\'',TCL_PATH='$(TCL_PATH_SQ)') \
-	$(subst ','\'',TCLTK_PATH='$(TCLTK_PATH_SQ)') \
-	$(subst ','\'',gitexecdir='$(gitexecdir_SQ)') \
-	$(subst ','\'',gg_libdir='$(libdir_SQ)') \
-	GITGUI_MACOSXAPP=$(GITGUI_MACOSXAPP) \
-#end TRACK_VARS
-
-GIT-GUI-VARS: FORCE
-	@VARS='$(TRACK_VARS)'; \
-	if test x"$$VARS" != x"`cat $@ 2>/dev/null`" ; then \
-		echo >&2 "    * new locations or Tcl/Tk interpreter"; \
-		echo >$@ "$$VARS"; \
-	fi
+lib/tclIndex: $(ALL_LIBFILES) generate-tclindex.sh GIT-GUI-BUILD-OPTIONS
+	$(QUIET_INDEX)$(SHELL_PATH) -x generate-tclindex.sh . ./GIT-GUI-BUILD-OPTIONS $(ALL_LIBFILES)
+
+GIT-GUI-BUILD-OPTIONS: FORCE
+	@sed \
+		-e 's|@GITGUI_GITEXECDIR@|$(gitexecdir_SQ)|' \
+		-e 's|@GITGUI_LIBDIR@|$(libdir_SQ)|' \
+		-e 's|@GITGUI_RELATIVE@|$(GITGUI_RELATIVE)|' \
+		-e 's|@SHELL_PATH@|$(SHELL_PATH_SQ)|' \
+		-e 's|@TCLTK_PATH@|$(TCLTK_PATH_SQ)|' \
+		-e 's|@TCL_PATH@|$(TCL_PATH_SQ)|' \
+		-e 's|@TKEXECUTABLE@|$(TKEXECUTABLE_SQ)|' \
+		$@.in >$@+
+	@if grep -q '^[A-Z][A-Z_]*=@.*@$$' $@+; then echo "Unsubstituted build options in $@" >&2 && exit 1; fi
+	@if cmp $@+ $@ >/dev/null 2>&1; then $(RM) $@+; else mv $@+ $@; fi
 
 ifdef GITGUI_MACOSXAPP
 all:: git-gui Git\ Gui.app
@@ -316,13 +260,13 @@ endif
 	$(QUIET)$(REMOVE_D0)'$(DESTDIR_SQ)$(libdir_SQ)' $(REMOVE_D1)
 	$(QUIET)$(REMOVE_D0)`dirname '$(DESTDIR_SQ)$(libdir_SQ)'` $(REMOVE_D1)
 
-dist-version:
+dist-version: GIT-VERSION-FILE
 	@mkdir -p $(TARDIR)
-	@echo $(GITGUI_VERSION) > $(TARDIR)/version
+	@sed 's|^GITGUI_VERSION=||' <GIT-VERSION-FILE  >$(TARDIR)/version
 
 clean::
 	$(RM_RF) $(GITGUI_MAIN) lib/tclIndex po/*.msg
-	$(RM_RF) GIT-VERSION-FILE GIT-GUI-VARS
+	$(RM_RF) GIT-VERSION-FILE GIT-GUI-BUILD-OPTIONS
 ifdef GITGUI_MACOSXAPP
 	$(RM_RF) 'Git Gui.app'* git-gui
 endif
diff --git a/generate-git-gui.sh b/generate-git-gui.sh
new file mode 100755
index 0000000..39dfafd
--- /dev/null
+++ b/generate-git-gui.sh
@@ -0,0 +1,29 @@
+#!/bin/sh
+
+set -e
+
+if test "$#" -ne 4
+then
+	echo >&2 "usage: $0 <INPUT> <OUTPUT> <BUILD_OPTIONS> <VERSION_FILE>"
+	exit 1
+fi
+
+INPUT="$1"
+OUTPUT="$2"
+BUILD_OPTIONS="$3"
+VERSION_FILE="$4"
+
+. "${BUILD_OPTIONS}"
+. "${VERSION_FILE}"
+
+rm -f "$OUTPUT" "$OUTPUT+"
+sed \
+	-e "1s|#!.*/sh|#!$SHELL_PATH|" \
+	-e "s|@@SHELL_PATH@@|$SHELL_PATH|" \
+	-e "1,30s|^ exec wish | exec '$TCLTK_PATH' |" \
+	-e "s|@@GITGUI_VERSION@@|$GITGUI_VERSION|g" \
+	-e "s|@@GITGUI_RELATIVE@@|$GITGUI_RELATIVE|" \
+	-e "${GITGUI_RELATIVE}s|@@GITGUI_LIBDIR@@|$GITGUI_LIBDIR|" \
+	"$INPUT" >"$OUTPUT"+
+chmod +x "$OUTPUT"+
+mv "$OUTPUT"+ "$OUTPUT"
diff --git a/generate-macos-app.sh b/generate-macos-app.sh
new file mode 100755
index 0000000..625b6e1
--- /dev/null
+++ b/generate-macos-app.sh
@@ -0,0 +1,30 @@
+#!/bin/sh
+
+set -e
+
+SOURCE_DIR="$1"
+OUTPUT="$2"
+BUILD_OPTIONS="$3"
+VERSION_FILE="$4"
+
+. "$BUILD_OPTIONS"
+. "$VERSION_FILE"
+
+rm -rf "$OUTPUT" "$OUTPUT+"
+
+mkdir -p "$OUTPUT+/Contents/MacOS"
+mkdir -p "$OUTPUT+/Contents/Resources/Scripts"
+
+cp "$TKEXECUTABLE" "$OUTPUT+/Contents/MacOS"
+cp "$SOURCE_DIR/macosx/git-gui.icns" "$OUTPUT+/Contents/Resources"
+sed \
+	-e "s/@@GITGUI_VERSION@@/$GITGUI_VERSION/g" \
+	-e "s/@@GITGUI_TKEXECUTABLE@@/$(basename "$TKEXECUTABLE")/g" \
+	"$SOURCE_DIR/macosx/Info.plist" \
+	>"$OUTPUT+/Contents/Info.plist"
+sed \
+	-e "s|@@gitexecdir@@|$GITGUI_GITEXECDIR|" \
+	-e "s|@@GITGUI_LIBDIR@@|$GITGUI_LIBDIR|" \
+	"$SOURCE_DIR/macosx/AppMain.tcl" \
+	>"$OUTPUT"+/Contents/Resources/Scripts/AppMain.tcl
+mv "$OUTPUT+" "$OUTPUT"
diff --git a/generate-macos-wrapper.sh b/generate-macos-wrapper.sh
new file mode 100755
index 0000000..269460c
--- /dev/null
+++ b/generate-macos-wrapper.sh
@@ -0,0 +1,34 @@
+#!/bin/sh
+
+set -e
+
+if test "$#" -ne 3
+then
+	echo >&2 "usage: $0 <OUTPUT> <BUILD_OPTIONS> <VERSION_FILE>"
+	exit 1
+fi
+
+OUTPUT="$1"
+BUILD_OPTIONS="$2"
+VERSION_FILE="$3"
+
+. "$BUILD_OPTIONS"
+. "$VERSION_FILE"
+
+rm -f "$OUTPUT" "$OUTPUT"+
+
+cat >"$OUTPUT"+ <<EOF
+#!$SHELL_PATH
+
+if test "z\$*" = zversion ||
+   test "z\$*" = z--version
+then
+	echo 'git-gui version $GITGUI_VERSION'
+else
+	libdir="\${GIT_GUI_LIB_DIR:-$GITGUI_LIBDIR}"
+	exec "\$libdir/Git Gui.app/Contents/MacOS/$(basename "$TKEXECUTABLE")" "\$0" "\$@"
+fi
+EOF
+
+chmod +x "$OUTPUT"+
+mv "$OUTPUT"+ "$OUTPUT"
diff --git a/generate-tclindex.sh b/generate-tclindex.sh
new file mode 100755
index 0000000..36e3a0b
--- /dev/null
+++ b/generate-tclindex.sh
@@ -0,0 +1,32 @@
+#!/bin/sh
+
+if test "$#" -lt 3
+then
+	echo >&2 "usage: $0 <BUILD_DIR> <BUILD_OPTIONS> <LIBFILE> [<LIBFILE>...]"
+	exit 1
+fi
+
+BUILD_DIR="$1"
+BUILD_OPTIONS="$2"
+shift 2
+LIBFILES="$(echo "$@" | sort | sed 's|lib/||g')"
+
+. "$BUILD_OPTIONS"
+
+cd "$BUILD_DIR"
+
+if {
+	echo "source lib/class.tcl;"
+	echo "auto_mkindex lib $LIBFILES"
+} | "$TCL_PATH"
+then
+	: ok
+else
+	 echo >&2 "    * $TCL_PATH failed; using unoptimized loading"
+	 rm -f $@
+	 echo '# Autogenerated by git-gui Makefile' >lib/tclIndex
+	 echo >>lib/tclIndex
+	 echo "class.tcl" >>lib/tclIndex
+	 printf "%s\n" $LIBFILES >>lib/tclIndex
+	 echo >>lib/tclIndex
+fi
diff --git a/lib/meson.build b/lib/meson.build
new file mode 100644
index 0000000..4b9efab
--- /dev/null
+++ b/lib/meson.build
@@ -0,0 +1,74 @@
+libfiles = [
+  'about.tcl',
+  'blame.tcl',
+  'branch_checkout.tcl',
+  'branch_create.tcl',
+  'branch_delete.tcl',
+  'branch_rename.tcl',
+  'branch.tcl',
+  'browser.tcl',
+  'checkout_op.tcl',
+  'choose_font.tcl',
+  'choose_repository.tcl',
+  'choose_rev.tcl',
+  'chord.tcl',
+  'class.tcl',
+  'commit.tcl',
+  'console.tcl',
+  'database.tcl',
+  'date.tcl',
+  'diff.tcl',
+  'encoding.tcl',
+  'error.tcl',
+  'index.tcl',
+  'line.tcl',
+  'logo.tcl',
+  'merge.tcl',
+  'mergetool.tcl',
+  'option.tcl',
+  'remote_add.tcl',
+  'remote_branch_delete.tcl',
+  'remote.tcl',
+  'search.tcl',
+  'shortcut.tcl',
+  'spellcheck.tcl',
+  'sshkey.tcl',
+  'status_bar.tcl',
+  'themed.tcl',
+  'tools_dlg.tcl',
+  'tools.tcl',
+  'transport.tcl',
+  'win32.tcl',
+]
+
+nontcl_libfiles = [
+  'git-gui.ico',
+  'win32_shortcut.js',
+]
+
+foreach file : libfiles + nontcl_libfiles
+  configure_file(
+    input: file,
+    output: file,
+    copy: true,
+    install: true,
+    install_dir: get_option('datadir') / 'git-gui/lib',
+  )
+endforeach
+
+custom_target(
+  output: 'tclIndex',
+  command: [
+    shell,
+    meson.project_source_root() / 'generate-tclindex.sh',
+    meson.project_build_root(),
+    meson.project_build_root() / 'GIT-GUI-BUILD-OPTIONS',
+    libfiles,
+  ],
+  depend_files: [
+    libfiles,
+    build_options,
+  ],
+  install: true,
+  install_dir: get_option('datadir') / 'git-gui/lib',
+)
diff --git a/meson.build b/meson.build
new file mode 100644
index 0000000..cdae85e
--- /dev/null
+++ b/meson.build
@@ -0,0 +1,148 @@
+project('git-gui',
+  meson_version: '>=0.61.0',
+)
+
+fs = import('fs')
+
+shell = find_program('sh')
+tclsh = find_program('tclsh')
+wish = find_program('wish')
+
+build_options_config = configuration_data()
+if target_machine.system() == 'windows'
+  build_options_config.set('GITGUI_RELATIVE', '1')
+else
+  build_options_config.set('GITGUI_RELATIVE', '')
+endif
+build_options_config.set_quoted('GITGUI_GITEXECDIR', get_option('prefix') / get_option('libexecdir') / 'git-core')
+build_options_config.set_quoted('GITGUI_LIBDIR', get_option('prefix') / get_option('datadir') / 'git-gui/lib')
+build_options_config.set_quoted('SHELL_PATH', fs.as_posix(shell.full_path()))
+build_options_config.set_quoted('TCLTK_PATH', fs.as_posix(wish.full_path()))
+build_options_config.set_quoted('TCL_PATH', fs.as_posix(tclsh.full_path()))
+if target_machine.system() == 'darwin'
+  tkexecutables = [
+    '/Library/Frameworks/Tk.framework/Resources/Wish.app/Contents/MacOS/Wish',
+    '/System/Library/Frameworks/Tk.framework/Resources/Wish.app/Contents/MacOS/Wish',
+    '/System/Library/Frameworks/Tk.framework/Resources/Wish Shell.app/Contents/MacOS/Wish Shell',
+  ]
+  tkexecutable = find_program(tkexecutables)
+  build_options_config.set_quoted('TKEXECUTABLE', tkexecutable.full_path())
+else
+  build_options_config.set('TKEXECUTABLE', '')
+endif
+
+build_options = configure_file(
+  input: 'GIT-GUI-BUILD-OPTIONS.in',
+  output: 'GIT-GUI-BUILD-OPTIONS',
+  configuration: build_options_config,
+)
+
+version_file = custom_target(
+  input: 'GIT-VERSION-GEN',
+  output: 'GIT-VERSION-FILE',
+  command: [
+    shell,
+    '@INPUT@',
+    meson.current_source_dir(),
+    '@OUTPUT@',
+  ],
+  build_always_stale: true,
+)
+
+configure_file(
+  input: 'git-gui--askpass',
+  output: 'git-gui--askpass',
+  copy: true,
+  install: true,
+  install_dir: get_option('libexecdir') / 'git-core',
+)
+
+gitgui_main = 'git-gui'
+gitgui_main_install_dir = get_option('libexecdir') / 'git-core'
+
+if target_machine.system() == 'windows'
+  gitgui_main = 'git-gui.tcl'
+
+  configure_file(
+    input: 'windows/git-gui.sh',
+    output: 'git-gui',
+    copy: true,
+    install: true,
+    install_dir: get_option('libexecdir') / 'git-core',
+  )
+elif target_machine.system() == 'darwin'
+  gitgui_main = 'git-gui.tcl'
+  gitgui_main_install_dir = get_option('datadir') / 'git-gui/lib'
+
+  custom_target(
+    output: 'git-gui',
+    command: [
+      shell,
+      meson.current_source_dir() / 'generate-macos-wrapper.sh',
+      '@OUTPUT@',
+      meson.current_build_dir() / 'GIT-GUI-BUILD-OPTIONS',
+      meson.current_build_dir() / 'GIT-VERSION-FILE',
+    ],
+    depends: [
+      version_file,
+    ],
+    depend_files: [
+      build_options,
+    ],
+    install: true,
+    install_dir: get_option('libexecdir') / 'git-core',
+  )
+
+  custom_target(
+    output: 'Git Gui.app',
+    command: [
+      shell,
+      meson.current_source_dir() / 'generate-macos-app.sh',
+      meson.current_source_dir(),
+      meson.current_build_dir() / 'Git Gui.app',
+      meson.current_build_dir() / 'GIT-GUI-BUILD-OPTIONS',
+      meson.current_build_dir() / 'GIT-VERSION-FILE',
+    ],
+    depends: [
+      version_file,
+    ],
+    depend_files: [
+      build_options,
+      'macosx/AppMain.tcl',
+      'macosx/Info.plist',
+      'macosx/git-gui.icns',
+    ],
+    build_by_default: true,
+    install: true,
+    install_dir: get_option('datadir') / 'git-gui/lib',
+  )
+endif
+
+custom_target(
+  input: 'git-gui.sh',
+  output: gitgui_main,
+  command: [
+    shell,
+    meson.current_source_dir() / 'generate-git-gui.sh',
+    '@INPUT@',
+    '@OUTPUT@',
+    meson.current_build_dir() / 'GIT-GUI-BUILD-OPTIONS',
+    meson.current_build_dir() / 'GIT-VERSION-FILE',
+  ],
+  depends: [
+    version_file,
+  ],
+  depend_files: [
+    build_options,
+  ],
+  install: true,
+  install_dir: gitgui_main_install_dir,
+)
+
+install_symlink('git-citool',
+  install_dir: get_option('libexecdir') / 'git-core',
+  pointing_to: 'git-gui',
+)
+
+subdir('lib')
+subdir('po')
diff --git a/po/meson.build b/po/meson.build
new file mode 100644
index 0000000..00cae74
--- /dev/null
+++ b/po/meson.build
@@ -0,0 +1,38 @@
+languages = [
+  'bg',
+  'de',
+  'el',
+  'fr',
+  'hu',
+  'it',
+  'ja',
+  'nb',
+  'pt_br',
+  'pt_pt',
+  'ru',
+  'sv',
+  'vi',
+  'zh_cn',
+]
+
+msgfmt = find_program('msgfmt', required: false)
+if not msgfmt.found()
+  subdir_done()
+endif
+
+foreach language : languages
+  custom_target(
+    input: language + '.po',
+    output: language + '.msg',
+    command: [
+      msgfmt,
+      '--statistics',
+      '--tcl',
+      '--locale=' + language,
+      '-d', meson.current_build_dir(),
+      '@INPUT@',
+    ],
+    install: true,
+    install_dir: get_option('datadir') / 'git-gui/lib/msgs',
+  )
+endforeach