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function gitpath = GetGitPath
% gitpath = GetGitPath -- Return auto-detected installation path
% for git client, if any. Return empty string if auto-detection not
% possible. Typical usage is like this:
%
% mygitcommand = [GetGitPath 'git describe']; system(mygitcommand);
%
% GetGitPath will return the path to be prefixed in front of the git
% executable. If none can be found, the git executable will be executed
% without path spec. If it is installed in the system executable search
% path, it will then still work.
%
% The function simply checks if the git executable is in the Matlab path
% and returns a proper path-spec. If it isn't found in the Matlab path, it
% tries default path locations for OS-X and Windows. If that doesn't work,
% it returns an empty string.
% History:
% 07/11/13 Written, based on GetSubversionPath (DHB).
% 10/28/13 Add IsLinux where we try out various possible UNIX paths.
% Maria Olkkonen reports that doing so makes this work properly
% on her linux system. (DHB)
% Check for alternative install location of Git:
if IsWin
% Search for Windows executable in Matlab's path:
gitpath = which('git.exe');
else
% Search for Unix executable in Matlab's path:
gitpath = which('git.');
end
% Found one?
if ~isempty(gitpath)
% Extract basepath and use it:
gitpath=[fileparts(gitpath) filesep];
else
% Could not find git executable in Matlabs path. Check the default
% install location on OS-X and abort if it isn't there. On M$-Win we
% simply have to hope that it is in some system dependent search path.
% Currently, we only know how to check this for Mac OSX and Linux.
if (IsOSX || IsLinux)
gitpath = '';
if isempty(gitpath) && exist('/usr/bin/git','file')
gitpath='/usr/bin/';
end
if isempty(gitpath) && exist('/usr/local/git/bin/git','file')
gitpath='/usr/local/git/bin/';
end
if isempty(gitpath) && exist('/usr/local/bin/git','file')
gitpath='/usr/local/bin/';
end
if isempty(gitpath) && exist('/bin/git','file')
gitpath='/bin/';
end
if isempty(gitpath) && exist('/opt/local/bin/git', 'file')
gitpath = '/opt/local/bin/';
end
elseif IsWin
[returnCode,gitpath] = system('where git');
if returnCode==0
gitpath = [fileparts(strtrim(gitpath)) filesep];
else
% failed, clear whatever the command returned
gitpath = '';
end
end
end
return;
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