1# git-gui branch (create/delete) support
2# Copyright (C) 2006, 2007 Shawn Pearce
3
4proc load_all_heads {} {
5 global all_heads
6 global some_heads_tracking
7
8 set rh refs/heads
9 set rh_len [expr {[string length $rh] + 1}]
10 set all_heads [list]
11 set fd [open "| git for-each-ref --format=%(refname) $rh" r]
12 while {[gets $fd line] > 0} {
13 if {!$some_heads_tracking || ![is_tracking_branch $line]} {
14 lappend all_heads [string range $line $rh_len end]
15 }
16 }
17 close $fd
18
19 set all_heads [lsort $all_heads]
20}
21
22proc load_all_tags {} {
23 set all_tags [list]
24 set fd [open "| git for-each-ref --format=%(refname) refs/tags" r]
25 while {[gets $fd line] > 0} {
26 if {![regsub ^refs/tags/ $line {} name]} continue
27 lappend all_tags $name
28 }
29 close $fd
30
31 return [lsort $all_tags]
32}
33
34proc populate_branch_menu {} {
35 global all_heads disable_on_lock
36
37 set m .mbar.branch
38 set last [$m index last]
39 for {set i 0} {$i <= $last} {incr i} {
40 if {[$m type $i] eq {separator}} {
41 $m delete $i last
42 set new_dol [list]
43 foreach a $disable_on_lock {
44 if {[lindex $a 0] ne $m || [lindex $a 2] < $i} {
45 lappend new_dol $a
46 }
47 }
48 set disable_on_lock $new_dol
49 break
50 }
51 }
52
53 if {$all_heads ne {}} {
54 $m add separator
55 }
56 foreach b $all_heads {
57 $m add radiobutton \
58 -label $b \
59 -command [list switch_branch $b] \
60 -variable current_branch \
61 -value $b
62 lappend disable_on_lock \
63 [list $m entryconf [$m index last] -state]
64 }
65}
66
67proc radio_selector {varname value args} {
68 upvar #0 $varname var
69 set var $value
70}
71
72proc switch_branch {new_branch} {
73 global HEAD commit_type current_branch repo_config
74
75 if {![lock_index switch]} return
76
77 # -- Our in memory state should match the repository.
78 #
79 repository_state curType curHEAD curMERGE_HEAD
80 if {[string match amend* $commit_type]
81 && $curType eq {normal}
82 && $curHEAD eq $HEAD} {
83 } elseif {$commit_type ne $curType || $HEAD ne $curHEAD} {
84 info_popup {Last scanned state does not match repository state.
85
86Another Git program has modified this repository since the last scan. A rescan must be performed before the current branch can be changed.
87
88The rescan will be automatically started now.
89}
90 unlock_index
91 rescan {set ui_status_value {Ready.}}
92 return
93 }
94
95 # -- Don't do a pointless switch.
96 #
97 if {$current_branch eq $new_branch} {
98 unlock_index
99 return
100 }
101
102 if {$repo_config(gui.trustmtime) eq {true}} {
103 switch_branch_stage2 {} $new_branch
104 } else {
105 set ui_status_value {Refreshing file status...}
106 set cmd [list git update-index]
107 lappend cmd -q
108 lappend cmd --unmerged
109 lappend cmd --ignore-missing
110 lappend cmd --refresh
111 set fd_rf [open "| $cmd" r]
112 fconfigure $fd_rf -blocking 0 -translation binary
113 fileevent $fd_rf readable \
114 [list switch_branch_stage2 $fd_rf $new_branch]
115 }
116}
117
118proc switch_branch_stage2 {fd_rf new_branch} {
119 global ui_status_value HEAD
120
121 if {$fd_rf ne {}} {
122 read $fd_rf
123 if {![eof $fd_rf]} return
124 close $fd_rf
125 }
126
127 set ui_status_value "Updating working directory to '$new_branch'..."
128 set cmd [list git read-tree]
129 lappend cmd -m
130 lappend cmd -u
131 lappend cmd --exclude-per-directory=.gitignore
132 lappend cmd $HEAD
133 lappend cmd $new_branch
134 set fd_rt [open "| $cmd" r]
135 fconfigure $fd_rt -blocking 0 -translation binary
136 fileevent $fd_rt readable \
137 [list switch_branch_readtree_wait $fd_rt $new_branch]
138}
139
140proc switch_branch_readtree_wait {fd_rt new_branch} {
141 global selected_commit_type commit_type HEAD MERGE_HEAD PARENT
142 global current_branch
143 global ui_comm ui_status_value
144
145 # -- We never get interesting output on stdout; only stderr.
146 #
147 read $fd_rt
148 fconfigure $fd_rt -blocking 1
149 if {![eof $fd_rt]} {
150 fconfigure $fd_rt -blocking 0
151 return
152 }
153
154 # -- The working directory wasn't in sync with the index and
155 # we'd have to overwrite something to make the switch. A
156 # merge is required.
157 #
158 if {[catch {close $fd_rt} err]} {
159 regsub {^fatal: } $err {} err
160 warn_popup "File level merge required.
161
162$err
163
164Staying on branch '$current_branch'."
165 set ui_status_value "Aborted checkout of '$new_branch' (file level merging is required)."
166 unlock_index
167 return
168 }
169
170 # -- Update the symbolic ref. Core git doesn't even check for failure
171 # here, it Just Works(tm). If it doesn't we are in some really ugly
172 # state that is difficult to recover from within git-gui.
173 #
174 if {[catch {git symbolic-ref HEAD "refs/heads/$new_branch"} err]} {
175 error_popup "Failed to set current branch.
176
177This working directory is only partially switched. We successfully updated your files, but failed to update an internal Git file.
178
179This should not have occurred. [appname] will now close and give up.
180
181$err"
182 do_quit
183 return
184 }
185
186 # -- Update our repository state. If we were previously in amend mode
187 # we need to toss the current buffer and do a full rescan to update
188 # our file lists. If we weren't in amend mode our file lists are
189 # accurate and we can avoid the rescan.
190 #
191 unlock_index
192 set selected_commit_type new
193 if {[string match amend* $commit_type]} {
194 $ui_comm delete 0.0 end
195 $ui_comm edit reset
196 $ui_comm edit modified false
197 rescan {set ui_status_value "Checked out branch '$current_branch'."}
198 } else {
199 repository_state commit_type HEAD MERGE_HEAD
200 set PARENT $HEAD
201 set ui_status_value "Checked out branch '$current_branch'."
202 }
203}