git-gui: Allow Tools request arguments from the user.

While static commands are already useful, some tools need
additional parameters to reach maximum usability. This
commit adds support for passing them one revision name
parameter, and one arbitrary string. With this addition,
the tools menu becomes flexible enough to implement basic
rebase support:

[core]
        editor = kwrite
[guitool "Rebase/Abort"]
        cmd = git rebase --abort
        confirm = yes
[guitool "Rebase/Continue"]
        cmd = git rebase --continue
[guitool "Rebase/Skip Commit"]
        cmd = git rebase --skip
        confirm = yes
[guitool "Rebase/Start..."]
        cmd = git rebase $ARGS $REVISION $CUR_BRANCH
        title = Start Rebase
        prompt = Rebase Current Branch
        argprompt = Flags
        revprompt = New Base
        revunmerged = yes

Some of the options, like title or prompt, are intentionally
not included in the Add dialog to avoid clutter. Also, the
dialog handles argprompt and revprompt as boolean vars.

Signed-off-by: Alexander Gavrilov <angavrilov@gmail.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

1 files changed, 12 insertions, 1 deletions

diff --git a/lib/tools.tcl b/lib/tools.tcl
index 00d46dd..044432e 100644
--- a/lib/tools.tcl
+++ b/lib/tools.tcl
@@ -77,7 +77,16 @@ proc tools_exec {fullname} {
 		}
 	}
 
-	if {[is_config_true "guitool.$fullname.confirm"]} {
+	catch { unset env(ARGS) }
+	catch { unset env(REVISION) }
+
+	if {[get_config "guitool.$fullname.revprompt"] ne {} ||
+	    [get_config "guitool.$fullname.argprompt"] ne {}} {
+		set dlg [tools_askdlg::dialog $fullname]
+		if {![tools_askdlg::execute $dlg]} {
+			return
+		}
+	} elseif {[is_config_true "guitool.$fullname.confirm"]} {
 		if {[ask_popup [mc "Are you sure you want to run %s?" $fullname]] ne {yes}} {
 			return
 		}
@@ -105,4 +114,6 @@ proc tools_exec {fullname} {
 	unset env(GIT_GUITOOL)
 	unset env(FILENAME)
 	unset env(CUR_BRANCH)
+	catch { unset env(ARGS) }
+	catch { unset env(REVISION) }
 }