You are correct about the Exec task only processing single line messages. In addition it also uses Regex.IsMatch
to evaluate the error/warning condition, without making use of the pattern's capture groups.
I was not able to find a way to work around this via MSBuild, but the changes to correct the problem were easy to make directly in the grunt task.
I'm using the grunt-typescript task from: https://www.npmjs.org/package/grunt-typescript.
There were 3 trivial changes necessary to make this work.
1) Replace the output utility methods near the top of tasks/typescript.js
:
/* Remove the >> markers and extra spacing from the output */
function writeError(str) {
console.log(str.trim().red);
}
function writeInfo(str) {
console.log(str.trim().cyan);
}
2) Replace Compiler.prototype.addDiagnostic
to write the file and error data on the same line:
Compiler.prototype.addDiagnostic = function (diagnostic) {
var diagnosticInfo = diagnostic.info();
if (diagnosticInfo.category === 1)
this.hasErrors = true;
var message = " ";
if (diagnostic.fileName()) {
message = diagnostic.fileName() +
"(" + (diagnostic.line() + 1) + "," + (diagnostic.character() + 1) + "): ";
}
this.ioHost.stderr.Write(message + diagnostic.message());
};
Once these changes are made, you no longer need the CustomErrorRegularExpression
to be set on your Exec task, and your build output should display the error text including the correct source file with line and column information.