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git/lib/branch_create.tcl
Shawn O. Pearce d41b43eb4c git-gui: Refactor branch switch to support detached head
This is a major rewrite of the way we perform switching between
branches and the subsequent update of the working directory.  Like
core Git we now use a single code path to perform all changes: our
new checkout_op class.  We also use it for branch creation/update
as it integrates the tracking branch fetch process along with a
very basic merge (fast-forward and reset only currently).

Because some users have literally hundreds of local branches we
use the standard revision picker (with its branch filtering tool)
to select the local branch, rather than keeping all of the local
branches in the Branch menu.  The branch menu listing out all of
the available branches is simply not sane for those types of huge
repositories.

Users can now checkout a detached head by ticking off the option
in the checkout dialog.  This option is off by default for the
obvious reason, but it can be easily enabled for any local branch
by simply checking it.  We also detach the head if any non local
branch was selected, or if a revision expression was entered.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
2007-07-08 22:34:46 -04:00

220 lines
4.9 KiB
Tcl

# git-gui branch create support
# Copyright (C) 2006, 2007 Shawn Pearce
class branch_create {
field w ; # widget path
field w_rev ; # mega-widget to pick the initial revision
field w_name ; # new branch name widget
field name {}; # name of the branch the user has chosen
field name_type user; # type of branch name to use
field opt_merge ff; # type of merge to apply to existing branch
field opt_checkout 1; # automatically checkout the new branch?
field opt_fetch 1; # refetch tracking branch if used?
field reset_ok 0; # did the user agree to reset?
constructor dialog {} {
global repo_config
make_toplevel top w
wm title $top "[appname] ([reponame]): Create Branch"
if {$top ne {.}} {
wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
}
label $w.header -text {Create New Branch} -font font_uibold
pack $w.header -side top -fill x
frame $w.buttons
button $w.buttons.create -text Create \
-default active \
-command [cb _create]
pack $w.buttons.create -side right
button $w.buttons.cancel -text {Cancel} \
-command [list destroy $w]
pack $w.buttons.cancel -side right -padx 5
pack $w.buttons -side bottom -fill x -pady 10 -padx 10
labelframe $w.desc -text {Branch Name}
radiobutton $w.desc.name_r \
-anchor w \
-text {Name:} \
-value user \
-variable @name_type
set w_name $w.desc.name_t
entry $w_name \
-borderwidth 1 \
-relief sunken \
-width 40 \
-textvariable @name \
-validate key \
-validatecommand [cb _validate %d %S]
grid $w.desc.name_r $w_name -sticky we -padx {0 5}
radiobutton $w.desc.match_r \
-anchor w \
-text {Match Tracking Branch Name} \
-value match \
-variable @name_type
grid $w.desc.match_r -sticky we -padx {0 5} -columnspan 2
grid columnconfigure $w.desc 1 -weight 1
pack $w.desc -anchor nw -fill x -pady 5 -padx 5
set w_rev [::choose_rev::new $w.rev {Starting Revision}]
pack $w.rev -anchor nw -fill both -expand 1 -pady 5 -padx 5
labelframe $w.options -text {Options}
frame $w.options.merge
label $w.options.merge.l -text {Update Existing Branch:}
pack $w.options.merge.l -side left
radiobutton $w.options.merge.no \
-text No \
-value none \
-variable @opt_merge
pack $w.options.merge.no -side left
radiobutton $w.options.merge.ff \
-text {Fast Forward Only} \
-value ff \
-variable @opt_merge
pack $w.options.merge.ff -side left
radiobutton $w.options.merge.reset \
-text {Reset} \
-value reset \
-variable @opt_merge
pack $w.options.merge.reset -side left
pack $w.options.merge -anchor nw
checkbutton $w.options.fetch \
-text {Fetch Tracking Branch} \
-variable @opt_fetch
pack $w.options.fetch -anchor nw
checkbutton $w.options.checkout \
-text {Checkout After Creation} \
-variable @opt_checkout
pack $w.options.checkout -anchor nw
pack $w.options -anchor nw -fill x -pady 5 -padx 5
trace add variable @name_type write [cb _select]
set name $repo_config(gui.newbranchtemplate)
if {[is_config_true gui.matchtrackingbranch]} {
set name_type match
}
bind $w <Visibility> [cb _visible]
bind $w <Key-Escape> [list destroy $w]
bind $w <Key-Return> [cb _create]\;break
tkwait window $w
}
method _create {} {
global repo_config
global M1B
set spec [$w_rev get_tracking_branch]
switch -- $name_type {
user {
set newbranch $name
}
match {
if {$spec eq {}} {
tk_messageBox \
-icon error \
-type ok \
-title [wm title $w] \
-parent $w \
-message "Please select a tracking branch."
return
}
if {![regsub ^refs/heads/ [lindex $spec 2] {} newbranch]} {
tk_messageBox \
-icon error \
-type ok \
-title [wm title $w] \
-parent $w \
-message "Tracking branch [$w get] is not a branch in the remote repository."
return
}
}
}
if {$newbranch eq {}
|| $newbranch eq $repo_config(gui.newbranchtemplate)} {
tk_messageBox \
-icon error \
-type ok \
-title [wm title $w] \
-parent $w \
-message "Please supply a branch name."
focus $w_name
return
}
if {[catch {git check-ref-format "heads/$newbranch"}]} {
tk_messageBox \
-icon error \
-type ok \
-title [wm title $w] \
-parent $w \
-message "'$newbranch' is not an acceptable branch name."
focus $w_name
return
}
if {$spec ne {} && $opt_fetch} {
set new {}
} elseif {[catch {set new [$w_rev commit_or_die]}]} {
return
}
set co [::checkout_op::new \
[$w_rev get] \
$new \
refs/heads/$newbranch]
$co parent $w
$co enable_create 1
$co enable_merge $opt_merge
$co enable_checkout $opt_checkout
if {$spec ne {} && $opt_fetch} {
$co enable_fetch $spec
}
if {[$co run]} {
destroy $w
} else {
focus $w_name
}
}
method _validate {d S} {
if {$d == 1} {
if {[regexp {[~^:?*\[\0- ]} $S]} {
return 0
}
if {[string length $S] > 0} {
set name_type user
}
}
return 1
}
method _select {args} {
if {$name_type eq {match}} {
$w_rev pick_tracking_branch
}
}
method _visible {} {
grab $w
if {$name_type eq {user}} {
$w_name icursor end
focus $w_name
}
}
}