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📄 createIsolatedProgram.ts

📊 Analysis Summary

Metric	Count
🔧 Functions	1
📦 Imports	5
📊 Variables & Constants	1

📚 Table of Contents

• Imports
• Variables & Constants
• Functions

🛠️ File Location:

📂 packages/typescript-estree/src/create-program/createIsolatedProgram.ts

📦 Imports

Name	Source
debug	debug
ParseSettings	../parseSettings
ASTAndDefiniteProgram	./shared
getScriptKind	./getScriptKind
createDefaultCompilerOptionsFromExtra	./shared

---

Variables & Constants

Name	Type	Kind	Value	Exported
compilerHost	ts.CompilerHost	const	`{
fileExists() {
return true;
},
getCanonicalFileName() {
return parseSettings.filePath;
},
getCurrentDirectory() {
return '';
},
getDefaultLibFileName() {
return 'lib.d.ts';
},
getDirectories() {
return [];
},

// TODO: Support Windows CRLF
getNewLine() {
  return '\n';
},
getSourceFile(filename: string) {
  return ts.createSourceFile(
    filename,
    parseSettings.codeFullText,
    ts.ScriptTarget.Latest,
    /* setParentNodes */ true,
    getScriptKind(parseSettings.filePath, parseSettings.jsx),
  );
},
readFile() {
  return undefined;
},
useCaseSensitiveFileNames() {
  return true;
},
writeFile() {
  return null;
},

}` | ✗ |

---

Functions

createIsolatedProgram(parseSettings: ParseSettings): ASTAndDefiniteProgram

Code

export function createIsolatedProgram(
  parseSettings: ParseSettings,
): ASTAndDefiniteProgram {
  log(
    'Getting isolated program in %s mode for: %s',
    parseSettings.jsx ? 'TSX' : 'TS',
    parseSettings.filePath,
  );

  const compilerHost: ts.CompilerHost = {
    fileExists() {
      return true;
    },
    getCanonicalFileName() {
      return parseSettings.filePath;
    },
    getCurrentDirectory() {
      return '';
    },
    getDefaultLibFileName() {
      return 'lib.d.ts';
    },
    getDirectories() {
      return [];
    },

    // TODO: Support Windows CRLF
    getNewLine() {
      return '\n';
    },
    getSourceFile(filename: string) {
      return ts.createSourceFile(
        filename,
        parseSettings.codeFullText,
        ts.ScriptTarget.Latest,
        /* setParentNodes */ true,
        getScriptKind(parseSettings.filePath, parseSettings.jsx),
      );
    },
    readFile() {
      return undefined;
    },
    useCaseSensitiveFileNames() {
      return true;
    },
    writeFile() {
      return null;
    },
  };

  const program = ts.createProgram(
    [parseSettings.filePath],
    {
      jsDocParsingMode: parseSettings.jsDocParsingMode,
      jsx: parseSettings.jsx ? ts.JsxEmit.Preserve : undefined,
      noResolve: true,
      target: ts.ScriptTarget.Latest,
      ...createDefaultCompilerOptionsFromExtra(parseSettings),
    },
    compilerHost,
  );

  const ast = program.getSourceFile(parseSettings.filePath);
  if (!ast) {
    throw new Error(
      'Expected an ast to be returned for the single-file isolated program.',
    );
  }

  return { ast, program };
}

• JSDoc:

  /**
   * @returns Returns a new source file and program corresponding to the linted code
   */
  

• Parameters:

• parseSettings: ParseSettings
• Return Type: ASTAndDefiniteProgram
• Calls:
• log
• ts.createSourceFile
• getScriptKind (from ./getScriptKind)
• ts.createProgram
• createDefaultCompilerOptionsFromExtra (from ./shared)
• program.getSourceFile
• Internal Comments:

  // TODO: Support Windows CRLF (x2)
  /* setParentNodes */
  

---