git-gui/git-gui--askpass

   1 #!/bin/sh
   2 # Tcl ignores the next line -*- tcl -*- \
   3 exec wish "$0" -- "$@"
   4
   5 # This is a trivial implementation of an SSH_ASKPASS handler.
   6 # Git-gui uses this script if none are already configured.
   7
   8 package require Tk
   9
  10 set answer {}
  11 set yesno  0
  12 set rc     255
  13
  14 if {$argc < 1} {
  15         set prompt "Enter your OpenSSH passphrase:"
  16 } else {
  17         set prompt [join $argv " "]
  18         if {[regexp -nocase {\(yes\/no\)\?\s*$} $prompt]} {
  19                 set yesno 1
  20         }
  21 }
  22
  23 message .m -text $prompt -justify center -aspect 4000
  24 pack .m -side top -fill x -padx 20 -pady 20 -expand 1
  25
  26 entry .e -textvariable answer -width 50
  27 pack .e -side top -fill x -padx 10 -pady 10
  28
  29 proc on_show_input_changed {args} {
  30         global show_input
  31         if {$show_input} {
  32                 .e configure -show ""
  33         } else {
  34                 .e configure -show "*"
  35         }
  36 }
  37 trace add variable show_input write "on_show_input_changed"
  38
  39 set show_input 0
  40
  41 if {!$yesno} {
  42         checkbutton .cb_show -text "Show input" -variable show_input
  43         pack .cb_show -side top -anchor nw
  44 }
  45
  46 frame .b
  47 button .b.ok     -text OK     -command finish
  48 button .b.cancel -text Cancel -command cancel
  49
  50 pack .b.ok -side left -expand 1
  51 pack .b.cancel -side right -expand 1
  52 pack .b -side bottom -fill x -padx 10 -pady 10
  53
  54 bind . <Visibility> {focus -force .e}
  55 bind . <Key-Return> [list .b.ok invoke]
  56 bind . <Key-Escape> [list .b.cancel invoke]
  57 bind . <Destroy>    {set rc $rc}
  58
  59 proc cancel {} {
  60         set ::rc 255
  61 }
  62
  63 proc finish {} {
  64         if {$::yesno} {
  65                 if {$::answer ne "yes" && $::answer ne "no"} {
  66                         tk_messageBox -icon error -title "Error" -type ok \
  67                                 -message "Only 'yes' or 'no' input allowed."
  68                         return
  69                 }
  70         }
  71
  72         # On Windows, force the encoding to UTF-8: it is what `git.exe` expects
  73         if {$::tcl_platform(platform) eq {windows}} {
  74                 set ::answer [encoding convertto utf-8 $::answer]
  75         }
  76
  77         puts $::answer
  78         set ::rc 0
  79 }
  80
  81 wm title . "OpenSSH"
  82 tk::PlaceWindow .
  83 vwait rc
  84 exit $rc