Check for IO errors after running a command

diff --git a/git-gui/git-gui.sh b/git-gui/git-gui.sh
index 97de595f2788ce28b4475bbbc726bfdd195ce434..3237f3d59627d60e3d5ac18ee588a61b0ce87576 100755 (executable)
--- a/git-gui/git-gui.sh
+++ b/git-gui/git-gui.sh
@@ -36,6 +36,24 @@ if {[catch {package require Tcl 8.4} err]
        exit 1
 }
 
+######################################################################
+##
+## enable verbose loading?
+
+if {![catch {set _verbose $env(GITGUI_VERBOSE)}]} {
+       unset _verbose
+       rename auto_load real__auto_load
+       proc auto_load {name args} {
+               puts stderr "auto_load $name"
+               return [uplevel 1 real__auto_load $name $args]
+       }
+       rename source real__source
+       proc source {name} {
+               puts stderr "source    $name"
+               uplevel 1 real__source $name
+       }
+}
+
 ######################################################################
 ##
 ## configure our library
@@ -48,26 +66,33 @@ if {$oguirel eq {1}} {
 } elseif {[string match @@* $oguirel]} {
        set oguilib [file join [file dirname [file normalize $argv0]] lib]
 }
+
 set idx [file join $oguilib tclIndex]
-catch {
-       set fd [open $idx r]
-       if {[gets $fd] eq {# Autogenerated by git-gui Makefile}} {
-               set idx [list]
-               while {[gets $fd n] >= 0} {
-                       if {$n ne {} && ![string match #* $n]} {
-                               lappend idx $n
-                       }
+if {[catch {set fd [open $idx r]} err]} {
+       catch {wm withdraw .}
+       tk_messageBox \
+               -icon error \
+               -type ok \
+               -title "git-gui: fatal error" \
+               -message $err
+       exit 1
+}
+if {[gets $fd] eq {# Autogenerated by git-gui Makefile}} {
+       set idx [list]
+       while {[gets $fd n] >= 0} {
+               if {$n ne {} && ![string match #* $n]} {
+                       lappend idx $n
                }
-       } else {
-               set idx {}
        }
-       close $fd
+} else {
+       set idx {}
 }
+close $fd
+
 if {$idx ne {}} {
        set loaded [list]
        foreach p $idx {
                if {[lsearch -exact $loaded $p] >= 0} continue
-               puts $p
                source [file join $oguilib $p]
                lappend loaded $p
        }
@@ -75,21 +100,7 @@ if {$idx ne {}} {
 } else {
        set auto_path [concat [list $oguilib] $auto_path]
 }
-unset -nocomplain oguilib oguirel idx fd
-
-if {![catch {set _verbose $env(GITGUI_VERBOSE)}]} {
-       unset _verbose
-       rename auto_load real__auto_load
-       proc auto_load {name args} {
-               puts stderr "auto_load $name"
-               return [uplevel 1 real__auto_load $name $args]
-       }
-       rename source real__source
-       proc source {name} {
-               puts stderr "source    $name"
-               uplevel 1 real__source $name
-       }
-}
+unset -nocomplain oguirel idx fd
 
 ######################################################################
 ##
@@ -205,6 +216,15 @@ proc is_config_true {name} {
        }
 }
 
+proc get_config {name} {
+       global repo_config
+       if {[catch {set v $repo_config($name)}]} {
+               return {}
+       } else {
+               return $v
+       }
+}
+
 proc load_config {include_global} {
        global repo_config global_config default_config
 
@@ -258,6 +278,17 @@ proc git {args} {
        return [eval exec git $args]
 }
 
+proc current-branch {} {
+       set ref {}
+       set fd [open [gitdir HEAD] r]
+       if {[gets $fd ref] <16
+        || ![regsub {^ref: refs/heads/} $ref {} ref]} {
+               set ref {}
+       }
+       close $fd
+       return $ref
+}
+
 auto_load tk_optionMenu
 rename tk_optionMenu real__tkOptionMenu
 proc tk_optionMenu {w varName args} {
@@ -406,15 +437,7 @@ proc repository_state {ctvar hdvar mhvar} {
 
        set mh [list]
 
-       if {[catch {set current_branch [git symbolic-ref HEAD]}]} {
-               set current_branch {}
-       } else {
-               regsub ^refs/((heads|tags|remotes)/)? \
-                       $current_branch \
-                       {} \
-                       current_branch
-       }
-
+       set current_branch [current-branch]
        if {[catch {set hd [git rev-parse --verify HEAD]}]} {
                set hd {}
                set ct initial
@@ -1230,6 +1253,10 @@ foreach class {Button Checkbutton Entry Label
 }
 unset class
 
+if {[is_Windows] || [is_MacOSX]} {
+       option add *Menu.tearOff 0
+}
+
 if {[is_MacOSX]} {
        set M1B M1
        set M1T Cmd
@@ -1260,11 +1287,13 @@ proc apply_config {} {
        }
 }
 
+set default_config(merge.diffstat) true
 set default_config(merge.summary) false
 set default_config(merge.verbosity) 2
 set default_config(user.name) {}
 set default_config(user.email) {}
 
+set default_config(gui.pruneduringfetch) false
 set default_config(gui.trustmtime) false
 set default_config(gui.diffcontext) 5
 set default_config(gui.newbranchtemplate) {}
@@ -1426,6 +1455,11 @@ if {[is_enabled branch]} {
        lappend disable_on_lock [list .mbar.branch entryconf \
                [.mbar.branch index last] -state]
 
+       .mbar.branch add command -label {Rename...} \
+               -command branch_rename::dialog
+       lappend disable_on_lock [list .mbar.branch entryconf \
+               [.mbar.branch index last] -state]
+
        .mbar.branch add command -label {Delete...} \
                -command do_delete_branch
        lappend disable_on_lock [list .mbar.branch entryconf \
@@ -1523,6 +1557,8 @@ if {[is_enabled transport]} {
        menu .mbar.push
        .mbar.push add command -label {Push...} \
                -command do_push_anywhere
+       .mbar.push add command -label {Delete...} \
+               -command remote_branch_delete::dialog
 }
 
 if {[is_MacOSX]} {
@@ -1640,14 +1676,8 @@ switch -- $subcommand {
 browser {
        set subcommand_args {rev?}
        switch [llength $argv] {
-       0 {
-               set current_branch [git symbolic-ref HEAD]
-               regsub ^refs/((heads|tags|remotes)/)? \
-                       $current_branch {} current_branch
-       }
-       1 {
-               set current_branch [lindex $argv 0]
-       }
+       0 { set current_branch [current-branch] }
+       1 { set current_branch [lindex $argv 0] }
        default usage
        }
        browser::new $current_branch
@@ -1680,9 +1710,7 @@ blame {
        unset is_path
 
        if {$head eq {}} {
-               set current_branch [git symbolic-ref HEAD]
-               regsub ^refs/((heads|tags|remotes)/)? \
-                       $current_branch {} current_branch
+               set current_branch [current-branch]
        } else {
                set current_branch $head
        }