Function sourceFileMayBeEmitted

test/fixtures/snapshot/typescript.js:18487–18494

Don't call this for `--outFile`, just for `--outDir` or plain emit. `--outFile` needs additional checks.

(sourceFile, host, forceDtsEmit)

    ts.getSourceFilesToEmit = getSourceFilesToEmit;
    /** Don't call this for `--outFile`, just for `--outDir` or plain emit. `--outFile` needs additional checks. */
    function sourceFileMayBeEmitted(sourceFile, host, forceDtsEmit) {
        var options = host.getCompilerOptions();
        return !(options.noEmitForJsFiles && isSourceFileJS(sourceFile)) &&
            !sourceFile.isDeclarationFile &&
            !host.isSourceFileFromExternalLibrary(sourceFile) &&
            (forceDtsEmit || (!(isJsonSourceFile(sourceFile) && host.getResolvedProjectReferenceToRedirect(sourceFile.fileName)) &&
                !host.isSourceOfProjectReferenceRedirect(sourceFile.fileName)));
    }
    ts.sourceFileMayBeEmitted = sourceFileMayBeEmitted;
    function getSourceFilePathInNewDir(fileName, host, newDirPath) {
        return getSourceFilePathInNewDirWorker(fileName, newDirPath, host.getCurrentDirectory(), host.getCommonSourceDirectory(), function (f) { return host.getCanonicalFileName(f); });