Merge branch 'master' of git://repo.or.cz/git-gui

* 'master' of git://repo.or.cz/git-gui:
  git-gui: Use vi-like keys in merge dialog
  git-gui: Include commit id/subject in merge choices
  git-gui: Show all possible branches for merge
  git-gui: Move merge support into a namespace
  git-gui: Allow vi keys to scroll the diff/blame regions
  git-gui: Move console procs into their own namespace
  git-gui: Refactor into multiple files to save my sanity
  git-gui: Track our own embedded values and rebuild when they change
  git-gui: Refactor to use our git proc more often
  git-gui: Use option database defaults to set the font
  git-gui: Cleanup common font handling for font_ui
  git-gui: Correct line wrapping for too many branch message
  git-gui: Warn users before making an octopus merge
  git-gui: Include the subject in the status bar after commit

Also perform an evil merge change to update Git's main Makefile to
pass the proper options down into git-gui now that it depends on
reasonable values for 'sharedir' and 'TCL_PATH'.

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

1 files changed, 410 insertions, 0 deletions

diff --git a/git-gui/lib/commit.tcl b/git-gui/lib/commit.tcl
new file mode 100644
index 0000000000..f9791f64db
--- /dev/null
+++ b/git-gui/lib/commit.tcl
@@ -0,0 +1,410 @@
+# git-gui misc. commit reading/writing support
+# Copyright (C) 2006, 2007 Shawn Pearce
+
+proc load_last_commit {} {
+	global HEAD PARENT MERGE_HEAD commit_type ui_comm
+	global repo_config
+
+	if {[llength $PARENT] == 0} {
+		error_popup {There is nothing to amend.
+
+You are about to create the initial commit.  There is no commit before this to amend.
+}
+		return
+	}
+
+	repository_state curType curHEAD curMERGE_HEAD
+	if {$curType eq {merge}} {
+		error_popup {Cannot amend while merging.
+
+You are currently in the middle of a merge that has not been fully completed.  You cannot amend the prior commit unless you first abort the current merge activity.
+}
+		return
+	}
+
+	set msg {}
+	set parents [list]
+	if {[catch {
+			set fd [open "| git cat-file commit $curHEAD" r]
+			fconfigure $fd -encoding binary -translation lf
+			if {[catch {set enc $repo_config(i18n.commitencoding)}]} {
+				set enc utf-8
+			}
+			while {[gets $fd line] > 0} {
+				if {[string match {parent *} $line]} {
+					lappend parents [string range $line 7 end]
+				} elseif {[string match {encoding *} $line]} {
+					set enc [string tolower [string range $line 9 end]]
+				}
+			}
+			set msg [encoding convertfrom $enc [read $fd]]
+			set msg [string trim $msg]
+			close $fd
+		} err]} {
+		error_popup "Error loading commit data for amend:\n\n$err"
+		return
+	}
+
+	set HEAD $curHEAD
+	set PARENT $parents
+	set MERGE_HEAD [list]
+	switch -- [llength $parents] {
+	0       {set commit_type amend-initial}
+	1       {set commit_type amend}
+	default {set commit_type amend-merge}
+	}
+
+	$ui_comm delete 0.0 end
+	$ui_comm insert end $msg
+	$ui_comm edit reset
+	$ui_comm edit modified false
+	rescan {set ui_status_value {Ready.}}
+}
+
+set GIT_COMMITTER_IDENT {}
+
+proc committer_ident {} {
+	global GIT_COMMITTER_IDENT
+
+	if {$GIT_COMMITTER_IDENT eq {}} {
+		if {[catch {set me [git var GIT_COMMITTER_IDENT]} err]} {
+			error_popup "Unable to obtain your identity:\n\n$err"
+			return {}
+		}
+		if {![regexp {^(.*) [0-9]+ [-+0-9]+$} \
+			$me me GIT_COMMITTER_IDENT]} {
+			error_popup "Invalid GIT_COMMITTER_IDENT:\n\n$me"
+			return {}
+		}
+	}
+
+	return $GIT_COMMITTER_IDENT
+}
+
+proc do_signoff {} {
+	global ui_comm
+
+	set me [committer_ident]
+	if {$me eq {}} return
+
+	set sob "Signed-off-by: $me"
+	set last [$ui_comm get {end -1c linestart} {end -1c}]
+	if {$last ne $sob} {
+		$ui_comm edit separator
+		if {$last ne {}
+			&& ![regexp {^[A-Z][A-Za-z]*-[A-Za-z-]+: *} $last]} {
+			$ui_comm insert end "\n"
+		}
+		$ui_comm insert end "\n$sob"
+		$ui_comm edit separator
+		$ui_comm see end
+	}
+}
+
+proc create_new_commit {} {
+	global commit_type ui_comm
+
+	set commit_type normal
+	$ui_comm delete 0.0 end
+	$ui_comm edit reset
+	$ui_comm edit modified false
+	rescan {set ui_status_value {Ready.}}
+}
+
+proc commit_tree {} {
+	global HEAD commit_type file_states ui_comm repo_config
+	global ui_status_value pch_error
+
+	if {[committer_ident] eq {}} return
+	if {![lock_index update]} return
+
+	# -- Our in memory state should match the repository.
+	#
+	repository_state curType curHEAD curMERGE_HEAD
+	if {[string match amend* $commit_type]
+		&& $curType eq {normal}
+		&& $curHEAD eq $HEAD} {
+	} elseif {$commit_type ne $curType || $HEAD ne $curHEAD} {
+		info_popup {Last scanned state does not match repository state.
+
+Another Git program has modified this repository since the last scan.  A rescan must be performed before another commit can be created.
+
+The rescan will be automatically started now.
+}
+		unlock_index
+		rescan {set ui_status_value {Ready.}}
+		return
+	}
+
+	# -- At least one file should differ in the index.
+	#
+	set files_ready 0
+	foreach path [array names file_states] {
+		switch -glob -- [lindex $file_states($path) 0] {
+		_? {continue}
+		A? -
+		D? -
+		M? {set files_ready 1}
+		U? {
+			error_popup "Unmerged files cannot be committed.
+
+File [short_path $path] has merge conflicts.  You must resolve them and add the file before committing.
+"
+			unlock_index
+			return
+		}
+		default {
+			error_popup "Unknown file state [lindex $s 0] detected.
+
+File [short_path $path] cannot be committed by this program.
+"
+		}
+		}
+	}
+	if {!$files_ready && ![string match *merge $curType]} {
+		info_popup {No changes to commit.
+
+You must add at least 1 file before you can commit.
+}
+		unlock_index
+		return
+	}
+
+	# -- A message is required.
+	#
+	set msg [string trim [$ui_comm get 1.0 end]]
+	regsub -all -line {[ \t\r]+$} $msg {} msg
+	if {$msg eq {}} {
+		error_popup {Please supply a commit message.
+
+A good commit message has the following format:
+
+- First line: Describe in one sentance what you did.
+- Second line: Blank
+- Remaining lines: Describe why this change is good.
+}
+		unlock_index
+		return
+	}
+
+	# -- Run the pre-commit hook.
+	#
+	set pchook [gitdir hooks pre-commit]
+
+	# On Cygwin [file executable] might lie so we need to ask
+	# the shell if the hook is executable.  Yes that's annoying.
+	#
+	if {[is_Cygwin] && [file isfile $pchook]} {
+		set pchook [list sh -c [concat \
+			"if test -x \"$pchook\";" \
+			"then exec \"$pchook\" 2>&1;" \
+			"fi"]]
+	} elseif {[file executable $pchook]} {
+		set pchook [list $pchook |& cat]
+	} else {
+		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_prehook_wait {fd_ph curHEAD msg} {
+	global pch_error ui_status_value
+
+	append pch_error [read $fd_ph]
+	fconfigure $fd_ph -blocking 1
+	if {[eof $fd_ph]} {
+		if {[catch {close $fd_ph}]} {
+			set ui_status_value {Commit declined by pre-commit hook.}
+			hook_failed_popup pre-commit $pch_error
+			unlock_index
+		} else {
+			commit_writetree $curHEAD $msg
+		}
+		set pch_error {}
+		return
+	}
+	fconfigure $fd_ph -blocking 0
+}
+
+proc commit_writetree {curHEAD msg} {
+	global ui_status_value
+
+	set ui_status_value {Committing changes...}
+	set fd_wt [open "| git write-tree" r]
+	fileevent $fd_wt readable \
+		[list commit_committree $fd_wt $curHEAD $msg]
+}
+
+proc commit_committree {fd_wt curHEAD msg} {
+	global HEAD PARENT MERGE_HEAD commit_type
+	global all_heads current_branch
+	global ui_status_value ui_comm selected_commit_type
+	global file_states selected_paths rescan_active
+	global repo_config
+
+	gets $fd_wt tree_id
+	if {$tree_id eq {} || [catch {close $fd_wt} err]} {
+		error_popup "write-tree failed:\n\n$err"
+		set ui_status_value {Commit failed.}
+		unlock_index
+		return
+	}
+
+	# -- Verify this wasn't an empty change.
+	#
+	if {$commit_type eq {normal}} {
+		set old_tree [git rev-parse "$PARENT^{tree}"]
+		if {$tree_id eq $old_tree} {
+			info_popup {No changes to commit.
+
+No files were modified by this commit and it was not a merge commit.
+
+A rescan will be automatically started now.
+}
+			unlock_index
+			rescan {set ui_status_value {No changes to commit.}}
+			return
+		}
+	}
+
+	# -- Build the message.
+	#
+	set msg_p [gitdir COMMIT_EDITMSG]
+	set msg_wt [open $msg_p w]
+	if {[catch {set enc $repo_config(i18n.commitencoding)}]} {
+		set enc utf-8
+	}
+	fconfigure $msg_wt -encoding binary -translation binary
+	puts -nonewline $msg_wt [encoding convertto $enc $msg]
+	close $msg_wt
+
+	# -- Create the commit.
+	#
+	set cmd [list commit-tree $tree_id]
+	foreach p [concat $PARENT $MERGE_HEAD] {
+		lappend cmd -p $p
+	}
+	lappend cmd <$msg_p
+	if {[catch {set cmt_id [eval git $cmd]} err]} {
+		error_popup "commit-tree failed:\n\n$err"
+		set ui_status_value {Commit failed.}
+		unlock_index
+		return
+	}
+
+	# -- Update the HEAD ref.
+	#
+	set reflogm commit
+	if {$commit_type ne {normal}} {
+		append reflogm " ($commit_type)"
+	}
+	set i [string first "\n" $msg]
+	if {$i >= 0} {
+		set subject [string range $msg 0 [expr {$i - 1}]]
+	} else {
+		set subject $msg
+	}
+	append reflogm {: } $subject
+	if {[catch {
+			git update-ref -m $reflogm HEAD $cmt_id $curHEAD
+		} err]} {
+		error_popup "update-ref failed:\n\n$err"
+		set ui_status_value {Commit failed.}
+		unlock_index
+		return
+	}
+
+	# -- Cleanup after ourselves.
+	#
+	catch {file delete $msg_p}
+	catch {file delete [gitdir MERGE_HEAD]}
+	catch {file delete [gitdir MERGE_MSG]}
+	catch {file delete [gitdir SQUASH_MSG]}
+	catch {file delete [gitdir GITGUI_MSG]}
+
+	# -- Let rerere do its thing.
+	#
+	if {[file isdirectory [gitdir rr-cache]]} {
+		catch {git rerere}
+	}
+
+	# -- Run the post-commit hook.
+	#
+	set pchook [gitdir hooks post-commit]
+	if {[is_Cygwin] && [file isfile $pchook]} {
+		set pchook [list sh -c [concat \
+			"if test -x \"$pchook\";" \
+			"then exec \"$pchook\";" \
+			"fi"]]
+	} elseif {![file executable $pchook]} {
+		set pchook {}
+	}
+	if {$pchook ne {}} {
+		catch {exec $pchook &}
+	}
+
+	$ui_comm delete 0.0 end
+	$ui_comm edit reset
+	$ui_comm edit modified false
+
+	if {[is_enabled singlecommit]} do_quit
+
+	# -- Make sure our current branch exists.
+	#
+	if {$commit_type eq {initial}} {
+		lappend all_heads $current_branch
+		set all_heads [lsort -unique $all_heads]
+		populate_branch_menu
+	}
+
+	# -- Update in memory status
+	#
+	set selected_commit_type new
+	set commit_type normal
+	set HEAD $cmt_id
+	set PARENT $cmt_id
+	set MERGE_HEAD [list]
+
+	foreach path [array names file_states] {
+		set s $file_states($path)
+		set m [lindex $s 0]
+		switch -glob -- $m {
+		_O -
+		_M -
+		_D {continue}
+		__ -
+		A_ -
+		M_ -
+		D_ {
+			unset file_states($path)
+			catch {unset selected_paths($path)}
+		}
+		DO {
+			set file_states($path) [list _O [lindex $s 1] {} {}]
+		}
+		AM -
+		AD -
+		MM -
+		MD {
+			set file_states($path) [list \
+				_[string index $m 1] \
+				[lindex $s 1] \
+				[lindex $s 3] \
+				{}]
+		}
+		}
+	}
+
+	display_all_files
+	unlock_index
+	reshow_diff
+	set ui_status_value \
+		"Created commit [string range $cmt_id 0 7]: $subject"
+}