Re: [msysGit] Re: Need your help with MinGW Issue 17: --color options don't work (produce garbage)

> On 15/08/07, Dmitry Kakurin wrote:
> > Here are the facts:
> >
> > 'git branch --color' produces garbage:
> > $ git branch --color
> >   devel??[m
> >   dima??[m
> >   dmitryk??[m
> > * ??[32mmaster??[m
> >   mob??[m
> >   next??[m
> >
> > 'git branch --color | cat' produces expected colored output.
> >
> > I've traced it down to printf statement in gdb and it sends the right
> > esc-sequence.
> > Where should I look next?
> 
> Windows doesn't recognise the *nix printf colour codes.
> 
> Piping through cat will be going through cygwin/mingw emulation,
> translating the colour codes to the correct API calls.
> 
> You need to call the SetConsoleTextAttribute Win32 API. For example:
> 
> #ifdef defined(WIN32) || defined(WIN64)
> 
> typedef WORD color_t;
> 
> color_t red = FOREGROUND_INTENSITY | FOREGROUND_RED;
> color_t green = FOREGROUND_INTENSITY | FOREGROUND_GREEN;
> color_t blue = FOREGROUND_INTENSITY | FOREGROUND_BLUE;
> 
> color_t white = red | green | blue;
> 
> void set_color( color_t color )
> {
>     SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), color );
> }
> 
> #else
> 
> typedef const char * color_t;
> 
> color_t red = ...;
> ...
> 
> void set_color( color_t color ){ printf( color ); }
> 
> #endif
> 
> That way, you can do things like:
>     set_color( red );
>     printf( ... );
>     set_color( blue );
> 
> This is not as pretty as the existing codebase, so another possibility
> would be to create wrappers around the console output functions (i.e.
> printf) and call SetConsoleTextAttribute there. This way, you can
> restore the old colour when a restore settings sequence is
> intercepted. It is also possible to reuse the GetStdHandle return
> value.
> 
> NOTE: There isn't a GetConsoleTextAttribute in the Windows API, but
> Google found this:
> 
> #if ( (defined(WIN32) || defined(_WINDOWS)) && !defined(__CYGWIN__) )
> && defined(_CONSOLE)
> 
> static WORD GetConsoleTextAttribute(HANDLE Console)
> {
>     CONSOLE_SCREEN_BUFFER_INFO ConsoleInfo;
>     GetConsoleScreenBufferInfo(Console, &ConsoleInfo);
>     return ConsoleInfo.wAttributes;
> }
> 
> #endif