private string SubstituteArguments(string arguments, VisualGitDiffToolArgs diffArgs, DiffToolMode toolMode)
{
if (diffArgs == null)
throw new ArgumentNullException("diffArgs");
if (_re == null)
{
const string ifBody = "\\?(?<tick>['\"])(?<ifbody>([^'\"]|('')|(\"\"))*)\\k<tick>";
const string elseBody = "(:(?<tick2>['\"])(?<elsebody>([^'\"]|('')|(\"\"))*)\\k<tick2>)?";
_re = new Regex(@"(\%(?<pc>[a-zA-Z0-9_]+)(\%|\b))|(\$\((?<vs>[a-zA-Z0-9_-]*)(\((?<arg>[a-zA-Z0-9_-]*)\))?\))" +
"|(\\$\\((?<if>[a-zA-Z0-9_-]+)" + ifBody + elseBody + "\\))");
}
return _re.Replace(arguments, new Replacer(this, diffArgs, toolMode).Replace).TrimEnd();
}
public Replacer(VisualGitDiff context, VisualGitDiffToolArgs args, DiffToolMode toolMode)
{
if (context == null)
throw new ArgumentNullException("context");
else if (args == null)
throw new ArgumentNullException("args");
_context = context;
_toolArgs = args;
_diffArgs = args as VisualGitDiffArgs;
_mergeArgs = args as VisualGitMergeArgs;
_patchArgs = args as VisualGitPatchArgs;
_toolMode = toolMode;
}
private bool Substitute(string reference, VisualGitDiffToolArgs args, DiffToolMode toolMode, out string program, out string arguments)
{
if (string.IsNullOrEmpty(reference))
throw new ArgumentNullException("reference");
else if (args == null)
throw new ArgumentNullException("args");
// Ok: We received a string with a program and arguments and windows
// wants a program and arguments separated. Let's find the program before substituting
reference = reference.TrimStart();
program = null;
arguments = null;
string app;
if (!string.IsNullOrEmpty(app = VisualGitDiffTool.GetToolNameFromTemplate(reference)))
{
// We have a predefined template. Just use it
VisualGitDiffTool tool = GetAppItem(app, toolMode);
if (tool == null)
return false;
else if (!tool.IsAvailable)
return false;
program = SubstituteArguments(tool.Program, args, toolMode);
arguments = SubstituteArguments(tool.Arguments, args, toolMode);
return !String.IsNullOrEmpty(program) && File.Exists(program);
}
else if (!TrySplitPath(reference, out program, out arguments))
return false;
program = SubstituteArguments(program, args, toolMode);
arguments = SubstituteArguments(arguments, args, toolMode);
return true;
}