[PATCH v2] git-gui--askpass: coerce answers to UTF-8 on Windows

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From: Luke Bonanomi <lbonanomi@xxxxxxxxx>

This addresses the issue where Git for Windows asks the user for a
password, no credential helper is available, and then Git fails to pick
up non-ASCII characters from the Git GUI helper.

This can be verified e.g. via

	echo host=http://abc.com |
	git -c credential.helper= credential fill

and then pasting some umlauts.

The underlying reason is that Git for Windows tries to communicate using
the UTF-8 encoding no matter what the actual current code page is. So
let's indulge Git for Windows and do use that encoding.

This fixes https://github.com/git-for-windows/git/issues/2215

Signed-off-by: Luke Bonanomi <lbonanomi@xxxxxxxxx>
Helped-by: Junio C Hamano <gitster@xxxxxxxxx>
Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
---
    Fix git-gui--askpass on Windows
    
    Windows has this odd thing where there is an active code page (somewhat
    like LC_CTYPE) and there is no real UTF-8 code page. So we need to help 
    git-gui--askpass along a bit to be of use when asking for credentials.
    
    Changes since v1:
    
     * Fixed indentation

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-578%2Fdscho%2Fgit-gui--askpass-utf-8-v2
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-578/dscho/git-gui--askpass-utf-8-v2
Pull-Request: https://github.com/gitgitgadget/git/pull/578

Range-diff vs v1:

 1:  3beec773772 ! 1:  7891941486d git-gui--askpass: coerce answers to UTF-8 on Windows
     @@ -20,6 +20,7 @@
          This fixes https://github.com/git-for-windows/git/issues/2215
      
          Signed-off-by: Luke Bonanomi <lbonanomi@xxxxxxxxx>
     +    Helped-by: Junio C Hamano <gitster@xxxxxxxxx>
          Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
      
       diff --git a/git-gui--askpass b/git-gui--askpass
     @@ -30,7 +31,7 @@
       	}
       
      +	# On Windows, force the encoding to UTF-8: it is what `git.exe` expects
     -+		if {$::tcl_platform(platform) eq {windows}} {
     ++	if {$::tcl_platform(platform) eq {windows}} {
      +		set ::answer [encoding convertto utf-8 $::answer]
      +	}
      +


 git-gui--askpass | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/git-gui--askpass b/git-gui--askpass
index 4277f30c411..1c99ee8ca20 100755
--- a/git-gui--askpass
+++ b/git-gui--askpass
@@ -56,6 +56,11 @@ proc finish {} {
 		}
 	}
 
+	# On Windows, force the encoding to UTF-8: it is what `git.exe` expects
+	if {$::tcl_platform(platform) eq {windows}} {
+		set ::answer [encoding convertto utf-8 $::answer]
+	}
+
 	puts $::answer
 	set ::rc 0
 }

base-commit: 63a58457e094c9c9bbf562b872009d32f1f88133
-- 
gitgitgadget



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