Function subscribeTsc

compiler/packages/snap/src/runner-watch.ts:165–196

(
  state: RunnerState,
  onChange: (state: RunnerState) => void,
)

}

function subscribeTsc(
  state: RunnerState,
  onChange: (state: RunnerState) => void,
) {
  // Run TS in incremental watch mode
  watchSrc(
    function onStart() {
      // Notify the user when compilation starts but don't clear the screen yet
      console.log('\nCompiling...');
    },
    isTypecheckSuccess => {
      let isCompilerBuildValid = false;
      if (isTypecheckSuccess) {
        try {
          execSync('yarn build', {cwd: PROJECT_ROOT});
          console.log('Built compiler successfully with tsup');
          isCompilerBuildValid = true;
        } catch (e) {
          console.warn('Failed to build compiler with tsup:', e);
        }
      }
      // Bump the compiler version after a build finishes
      // and re-run tests
      if (isCompilerBuildValid) {
        state.compilerVersion++;
      }
      state.isCompilerBuildValid = isCompilerBuildValid;
      state.mode.action = RunnerAction.Test;
      onChange(state);
    },
  );
}

function subscribeKeyEvents(
  state: RunnerState,