Squashed 'third_party/git/' content from commit cb71568594

git-subtree-dir: third_party/git
git-subtree-split: cb715685942260375e1eb8153b0768a376e4ece7

git-gui/lib/branch.tcl

@@ -0,0 +1,38 @@
+# git-gui branch (create/delete) support
+# Copyright (C) 2006, 2007 Shawn Pearce
+
+proc load_all_heads {} {
+	global some_heads_tracking
+
+	set rh refs/heads
+	set rh_len [expr {[string length $rh] + 1}]
+	set all_heads [list]
+	set fd [git_read for-each-ref --format=%(refname) $rh]
+	while {[gets $fd line] > 0} {
+		if {!$some_heads_tracking || ![is_tracking_branch $line]} {
+			lappend all_heads [string range $line $rh_len end]
+		}
+	}
+	close $fd
+
+	return [lsort $all_heads]
+}
+
+proc load_all_tags {} {
+	set all_tags [list]
+	set fd [git_read for-each-ref \
+		--sort=-taggerdate \
+		--format=%(refname) \
+		refs/tags]
+	while {[gets $fd line] > 0} {
+		if {![regsub ^refs/tags/ $line {} name]} continue
+		lappend all_tags $name
+	}
+	close $fd
+	return $all_tags
+}
+
+proc radio_selector {varname value args} {
+	upvar #0 $varname var
+	set var $value
+}