git-gui: Automatically update-index all included files before commit.

If the user has "Allow Partially Included Files" disabled (and most
probably will as its the default setting) we should run update-index
on every included file before commit to make sure that any changes
made by the user since the last rescan will still be part of this
commit.

If we don't update-index every modified file the user will likely
become confused when part of their changes were committed and other
parts weren't; and those other parts won't show up until a later
rescan occurs.  Since we don't rescan immediately after a commit
this may be a while.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

git-gui

@@ -420,7 +420,7 @@ proc rescan_done {fd buf after} {
 	display_all_files
 
 	if {$repo_config(gui.partialinclude) ne {true}} {
-		set pathList  [list]
+		set pathList [list]
 		foreach path [array names file_states] {
 			switch -- [lindex $file_states($path) 0] {
 			AM -
@@ -703,9 +703,7 @@ proc load_last_commit {} {
 }
 
 proc commit_tree {} {
-	global tcl_platform HEAD gitdir commit_type file_states
-	global pch_error
-	global ui_status_value ui_comm
+	global HEAD commit_type file_states ui_comm repo_config
 
 	if {![lock_index update]} return
 
@@ -719,8 +717,10 @@ proc commit_tree {} {
 		error_popup {Last scanned state does not match repository state.
 
 Its highly likely that another Git program modified the
-repository since our last scan.  A rescan is required
+repository since the last scan.  A rescan is required
 before committing.
+
+A rescan will be automatically started now.
 }
 		unlock_index
 		rescan {set ui_status_value {Ready.}}
@@ -731,8 +731,7 @@ before committing.
 	#
 	set files_ready 0
 	foreach path [array names file_states] {
-		set s $file_states($path)
-		switch -glob -- [lindex $s 0] {
+		switch -glob -- [lindex $file_states($path) 0] {
 		_? {continue}
 		A? -
 		D? -
@@ -779,10 +778,39 @@ A good commit message has the following format:
 		return
 	}
 
-	# -- Ask the pre-commit hook for the go-ahead.
+	# -- Update included files if partialincludes are off.
 	#
+	if {$repo_config(gui.partialinclude) ne {true}} {
+		set pathList [list]
+		foreach path [array names file_states] {
+			switch -glob -- [lindex $file_states($path) 0] {
+			A? -
+			M? {lappend pathList $path}
+			}
+		}
+		if {$pathList ne {}} {
+			unlock_index
+			update_index \
+				"Updating included files" \
+				$pathList \
+				[concat {lock_index update;} \
+					[list commit_prehook $curHEAD $msg]]
+			return
+		}
+	}
+
+	commit_prehook $curHEAD $msg
+}
+
+proc commit_prehook {curHEAD msg} {
+	global tcl_platform gitdir ui_status_value pch_error
+
+	# On Cygwin [file executable] might lie so we need to ask
+	# the shell if the hook is executable.  Yes that's annoying.
+
 	set pchook [file join $gitdir hooks pre-commit]
-	if {$tcl_platform(platform) eq {windows} && [file isfile $pchook]} {
+	if {$tcl_platform(platform) eq {windows}
+		&& [file isfile $pchook]} {
 		set pchook [list sh -c [concat \
 			"if test -x \"$pchook\";" \
 			"then exec \"$pchook\" 2>&1;" \
@@ -790,21 +818,19 @@ A good commit message has the following format:
 	} elseif {[file executable $pchook]} {
 		set pchook [list $pchook |& cat]
 	} else {
-		set pchook {}
-	}
-	if {$pchook ne {}} {
-		set ui_status_value {Calling pre-commit hook...}
-		set pch_error {}
-		set fd_ph [open "| $pchook" r]
-		fconfigure $fd_ph -blocking 0 -translation binary
-		fileevent $fd_ph readable \
-			[list commit_stage1 $fd_ph $curHEAD $msg]
-	} else {
-		commit_stage2 $curHEAD $msg
+		commit_writetree $curHEAD $msg
+		return
 	}
+
+	set ui_status_value {Calling pre-commit hook...}
+	set pch_error {}
+	set fd_ph [open "| $pchook" r]
+	fconfigure $fd_ph -blocking 0 -translation binary
+	fileevent $fd_ph readable \
+		[list commit_prehook_wait $fd_ph $curHEAD $msg]
 }
 
-proc commit_stage1 {fd_ph curHEAD msg} {
+proc commit_prehook_wait {fd_ph curHEAD msg} {
 	global pch_error ui_status_value
 
 	append pch_error [read $fd_ph]
@@ -815,25 +841,24 @@ proc commit_stage1 {fd_ph curHEAD msg} {
 			hook_failed_popup pre-commit $pch_error
 			unlock_index
 		} else {
-			commit_stage2 $curHEAD $msg
+			commit_writetree $curHEAD $msg
 		}
 		set pch_error {}
-	} else {
-		fconfigure $fd_ph -blocking 0
+		return
 	}
+	fconfigure $fd_ph -blocking 0
 }
 
-proc commit_stage2 {curHEAD msg} {
+proc commit_writetree {curHEAD msg} {
 	global ui_status_value
 
-	# -- Write the tree in the background.
-	#
 	set ui_status_value {Committing changes...}
 	set fd_wt [open "| git write-tree" r]
-	fileevent $fd_wt readable [list commit_stage3 $fd_wt $curHEAD $msg]
+	fileevent $fd_wt readable \
+		[list commit_committree $fd_wt $curHEAD $msg]
 }
 
-proc commit_stage3 {fd_wt curHEAD msg} {
+proc commit_committree {fd_wt curHEAD msg} {
 	global single_commit gitdir HEAD PARENT commit_type tcl_platform
 	global ui_status_value ui_comm
 	global file_states selected_paths
@@ -1252,14 +1277,20 @@ proc write_update_index {fd pathList totalCnt batch msg after} {
 		set path [lindex $pathList $update_index_cp]
 		incr update_index_cp
 
-		switch -- [lindex $file_states($path) 0] {
-		AM -
-		_O {set new A*}
-		_M -
-		MM {set new M*}
+		switch -glob -- [lindex $file_states($path) 0] {
 		AD -
+		MD -
 		_D {set new D*}
-		default {continue}
+
+		_M -
+		MM -
+		M_ {set new M*}
+
+		_O -
+		AM -
+		A_ {set new A*}
+
+		?? {continue}
 		}
 
 		puts -nonewline $fd $path