On 2017-03-31 21:44, Jakub Narębski wrote:
> W dniu 31.03.2017 o 14:38, Torsten Bögershausen pisze:
>> On 30.03.17 21:35, Jakub Narębski wrote:
>>> Hello,
>>>
>>> Recently I had to work on a project which uses legacy 8-bit encoding
>>> (namely cp1250 encoding) instead of utf-8 for text files (LaTeX
>>> documents). My terminal, that is Git Bash from Git for Windows is set
>>> up for utf-8.
>>>
>>> I wanted for "git diff" and friends to return something sane on said
>>> utf-8 terminal, instead of mojibake. There is 'encoding'
>>> gitattribute... but it works only for GUI ('git gui', that is).
>>>
>>> Therefore I have (ab)used textconv facility to convert from cp1250 of
>>> file encoding to utf-8 encoding of console.
>>>
>>> I have set the following in .gitattributes file:
>>>
>>> ## LaTeX documents in cp1250 encoding
>>> *.tex text diff=mylatex
>>>
>>> The 'mylatex' driver is defined as:
>>>
>>> [diff "mylatex"]
>>> xfuncname = "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$"
>>> wordRegex = "\\\\[a-zA-Z]+|[{}]|\\\\.|[^\\{}[:space:]]+"
>>> textconv = \"C:/Program Files/Git/usr/bin/iconv.exe\" -f cp1250 -t
>>> utf-8
>>> cachetextconv = true
>>>
>>> And everything would be all right... if not the fact that Git appends
>>> spurious ^M to added lines in the `git diff` output. Files use CRLF
>>> end-of-line convention (the native MS Windows one).
>>>
>>> $ git diff test.tex
>>> diff --git a/test.tex b/test.tex
>>> index 029646e..250ab16 100644
>>> --- a/test.tex
>>> +++ b/test.tex
>>> @@ -1,4 +1,4 @@
>>> -\documentclass{article}
>>> +\documentclass{mwart}^M
>>>
>>> \usepackage[cp1250]{inputenc}
>>> \usepackage{polski}
>>>
>>> What gives? Why there is this ^M tacked on the end of added lines,
>>> while it is not present in deleted lines, nor in content lines?
>>>
>>> Puzzled.
>>>
>>> P.S. Git has `i18n.commitEncoding` and `i18n.logOutputEncoding`; pity
>>> that it doesn't supports in core `encoding` attribute together with
>>> having `i18n.outputEncoding`.
>>
>> Is there a chance to give us a receipt how to reproduce it?
>> A complete test script or ?
>> (I don't want to speculate, if the invocation of iconv is the problem,
>> where stdout is not in "binary mode", or however this is called under
>> Windows)
>
> I'm sorry, I though I posted whole recipe, but I missed some details
> in the above description of the case.
>
> First, files are stored on filesystem using CRLF eol (DOS end-of-line
> convention). Due to `core.autocrlf` they are converted to LF in blobs,
> that is in the index and in the repository.
>
> Second, a textconv with filter preserving end-of-line needs to be
> configured. I have used `iconv`, but I suspect that the problem would
> happen also for `cat`.
>
> In the .gitattributes file, or .git/info/attributes add, for example:
>
> *.tex text diff=myconv
>
> In the .git/config configure the textconv filter, for example:
>
> [diff "myconv"]
> textconv = iconv.exe -f cp1250 -t utf-8
>
> Create a file which filename matches the attribute line, and which
> uses CRLF end of line convention, and add it to Git (adding it to
> the index):
>
> $ printf "foo\r\n" >foo.tex
> $ git add foo.tex
>
> Modify file (also with CRLF):
>
> $ printf "bar\r\n" >foo.tex
>
> Check the difference
>
> $ git diff foo.tex
>
> HTH
>
There seems to be a bug in Git, when it comes to "git diff".
Before we feed the content of the working tree into the
diff machinery, a call to convert_to_git() should be made.
But it seems as there is something missing, the expected
"+fox" becomes a "+foxQ"
#!/bin/sh
test_description='CRLF with diff filter'
. ./test-lib.sh
test_expect_success 'setup' '
git config core.autocrlf input &&
printf "foo\r\n" >foo.tex &&
git add foo.tex &&
echo >.gitattributes &&
git checkout -b master &&
git add .gitattributes &&
git commit -m "Add foo.txt" &&
cat >.git/config <<-\EOF
[diff "myconv"]
textconv = sed -e "s/f/g"
EOF
'
test_expect_success 'check EOL in diff' '
printf "fox\r\n" >foo.tex &&
cat >expect <<-\EOF &&
diff --git a/foo.tex b/foo.tex
index 257cc56..88c2893 100644
--- a/foo.tex
+++ b/foo.tex
@@ -1 +1 @@
-foo
+fox
EOF
git diff foo.tex | tr "\015" Q >actual &&
test_cmp expect actual
'
test_done
