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Specifying a file for error messages within TypeScript tsconfig.json

I am running the TypeScript transpiler on some code. I want to trap any error messages that the transpiler might emit to a file specified within my tsconfig.json. I do not see an attribute within the specifications for doing that.

Am I missing something?

Thanks!

Topic

Where do you see the error messages now?

In reply to Specifying a file for error messages within TypeScript tsconfig.json

I see there is a Command Line Interface (CLI) at https://www.typescriptlang.org/docs/handbook/compiler-options.html so I’d try the command line and see if the errors show on screen.

After that we can use the old redirects from the CLI.

https://helpdeskgeek.com/how-to/redirect-output-from-command-line-to-text-file/ is a refresher for both standard and error output.

They are displayed in the command window … depending …

In reply to Where do you see the error messages now?

Hi RProffitt,

THANKS for the response.

I know about the command line option with redirection.

I was hoping that I wouldn’t have to go into the details of my problem,
that there would be a simple config option that I could set that I am not aware of.

Here is my code, with comments as to what I tried, and what happened.

————————————————————————-

static class TypeScriptCompiler
{
static string L_file_path;
static string L_TS_file_spec;
static string L_bat_TS_file_spec;
static string L_JS_file_spec;
static string L_tsc_file_spec;

public static void Compile(string P_tsPath, CLS_Options P_options = null)
{
L_file_path = @”C:\a01_temp”;
L_TS_file_spec = Path.Combine (L_file_path, “test.ts”);
L_JS_file_spec = Path.Combine (L_file_path, “test.js”);
L_tsc_file_spec
= “C:\\Users\\Ron Smith\\AppData\\Roaming\\npm\\node_modules\\typescript\\bin\\tsc”;

string L_cmd;

Process L_tsc_process = new Process();
ProcessStartInfo psi;

// THIS ProcessStartInfo set threw the Win32Exception listed below.

//psi = new ProcessStartInfo
// (“tsc”,
// ” –project C:\\a01_temp\\tsconfig.json”);

// System.ComponentModel.Win32Exception
// HResult=0x80004005
// Message=The system cannot find the file specified
// Source=System
// StackTrace:
// at System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo)
// at NS_TypeScript.TypeScriptCompiler.Compile(String P_tsPath, CLS_Options P_options)
// in K:\Software Development\CLS_TypeScript_01.cs:line 235
// at NS_TypeScript.Program.Main(String[] args)
// in K:\Software Development\CLS_TypeScript_01.cs:line 48

// I do not know why the process could not find “tsc” like it should have.
// If anyone could figure this out, it might solve my problem.

CONT’D …

PART 2

In reply to They are displayed in the command window … depending …

// NEXT APPROACH: Try writing the command to a batch file,
// then execute the batch file.

// The batch file DID execute properly,
// and the errors were displayed in the command box,
// but the output was not redirected when this was run from a separate process
// within .NET (C#).

// The error messages were indeed redirected to the given log file (cmpl_diag.txt)
// when the generated batch file was run directly from the command line.

// THIS is stuff that was tried before but did not work,
// including a pipe to another process that might handle the redirect.
//L_cmd = L_tsc_file_spec + $” –project C:/a01_temp/tsconfig.json”;
//L_cmd = “cmd tsc” + $” –project C:/a01_temp/tsconfig.json”;
//L_cmd = “tsc” + $” –project C:/a01_temp/tsconfig.json cmpl_diag.txt 2>&1″;
//L_cmd = “tsc” + $” –project C:/a01_temp/tsconfig.json | more >cmpl_diag_02.txt”;
//L_cmd = “tsc” + ” –project C:\\a01_temp\\tsconfig.json | more >cmpl_diag_02.txt”;
//L_cmd = “tsc” + ” –project C:\\a01_temp\\tsconfig.json > cmpl_diag_02.txt 2>&1″;

// THIS is the most-recent attempt.

L_cmd = “tsc” + $” –project C:/a01_temp/tsconfig.json > cmpl_diag_02.txt 2>&1″;

// Creating the batch file.
L_bat_TS_file_spec = Path.Combine (L_file_path, “test.bat”);
using (StreamWriter
L_SW = new StreamWriter (L_bat_TS_file_spec))
{
L_SW.Write (L_cmd);
}
psi = new ProcessStartInfo (L_bat_TS_file_spec);

// run without showing console windows
psi.CreateNoWindow = true;
psi.UseShellExecute = false;
psi.Verb = “runas”;

// redirects the compiler error output, so we can read
// and display errors if any
psi.RedirectStandardOutput = true;
psi.RedirectStandardError = true;

L_tsc_process.StartInfo = psi;
L_tsc_process.Start();

// SHOULD read the error output
// … but nothing was read.
var msg = L_tsc_process.StandardError.ReadToEnd();

// make sure it finished executing before proceeding
L_tsc_process.WaitForExit();

CONT’D …

PART 3

In reply to PART 2

// TRIED moving this down below the “WaitForExit”
// … but still nothing was read.
//var msg = L_tsc_process.StandardError.ReadToEnd();
}
}

———————————————————–

C:\\a01_temp\\tsconfig.json

{
“compilerOptions”: {
“sourceMap”: true,
“noImplicitAny”: true,
“module”: “commonjs”,
“target”: “es5”,
“allowJs”: true,
“removeComments”: false,
“typeRoots”: [
“C:\\TypeScript\\a16_bin\\node_modules\\@types”
]
},
“include”: [
“C:\\a01_temp\\test.ts”
]
}

THANKS AGAIN!

PROBLEM SOLVED!

In reply to PART 3

PROBLEM SOLVED!

Specifying the absolute file path on the output file using the generated batch file approach solved the problem.

THANKS for reading.

[Author]

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