git-gui: properly popup error if gitk should be started but is not installed
On 'Visualize ...', a gitk process is started. Since it is run in the background, catching a possible startup error doesn't work, and the error output goes to the console git-gui is started from. The most probable startup error is that gitk is not installed; so before trying to start, check for the existence of the gitk program, and popup an error message unless it's found. This was noticed and reported by Paul Wise through http://bugs.debian.org/429810 Signed-off-by: Gerrit Pape <pape@smarden.org> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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@ -1042,15 +1042,17 @@ proc do_gitk {revs} {
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# lets us bypass using shell process on Windows systems.
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#
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set cmd [list [info nameofexecutable]]
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lappend cmd [gitexec gitk]
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set exe [gitexec gitk]
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lappend cmd $exe
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if {$revs ne {}} {
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append cmd { }
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append cmd $revs
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}
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if {[catch {eval exec $cmd &} err]} {
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error_popup "Failed to start gitk:\n\n$err"
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if {! [file exists $exe]} {
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error_popup "Unable to start gitk:\n\n$exe does not exist"
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} else {
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eval exec $cmd &
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set ui_status_value $starting_gitk_msg
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after 10000 {
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if {$ui_status_value eq $starting_gitk_msg} {
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