codeql-action/src/analyze.ts

import * as fs from "fs";
import * as path from "path";

import * as toolrunner from "@actions/exec/lib/toolrunner";

import * as analysisPaths from "./analysis-paths";
import { getCodeQL } from "./codeql";
import * as configUtils from "./config-utils";
import { countLoc } from "./count-loc";
import { isScannedLanguage, Language } from "./languages";
import { Logger } from "./logging";
import * as sharedEnv from "./shared-environment";
import { combineSarifFiles } from "./upload-lib";
import * as util from "./util";

export class CodeQLAnalysisError extends Error {
  queriesStatusReport: QueriesStatusReport;

  constructor(queriesStatusReport: QueriesStatusReport, message: string) {
    super(message);

    this.name = "CodeQLAnalysisError";
    this.queriesStatusReport = queriesStatusReport;
  }
}

export interface QueriesStatusReport {
  // Time taken in ms to analyze builtin queries for cpp (or undefined if this language was not analyzed)
  analyze_builtin_queries_cpp_duration_ms?: number;
  // Time taken in ms to analyze builtin queries for csharp (or undefined if this language was not analyzed)
  analyze_builtin_queries_csharp_duration_ms?: number;
  // Time taken in ms to analyze builtin queries for go (or undefined if this language was not analyzed)
  analyze_builtin_queries_go_duration_ms?: number;
  // Time taken in ms to analyze builtin queries for java (or undefined if this language was not analyzed)
  analyze_builtin_queries_java_duration_ms?: number;
  // Time taken in ms to analyze builtin queries for javascript (or undefined if this language was not analyzed)
  analyze_builtin_queries_javascript_duration_ms?: number;
  // Time taken in ms to analyze builtin queries for python (or undefined if this language was not analyzed)
  analyze_builtin_queries_python_duration_ms?: number;
  // Time taken in ms to analyze custom queries for cpp (or undefined if this language was not analyzed)
  analyze_custom_queries_cpp_duration_ms?: number;
  // Time taken in ms to analyze custom queries for csharp (or undefined if this language was not analyzed)
  analyze_custom_queries_csharp_duration_ms?: number;
  // Time taken in ms to analyze custom queries for go (or undefined if this language was not analyzed)
  analyze_custom_queries_go_duration_ms?: number;
  // Time taken in ms to analyze custom queries for java (or undefined if this language was not analyzed)
  analyze_custom_queries_java_duration_ms?: number;
  // Time taken in ms to analyze custom queries for javascript (or undefined if this language was not analyzed)
  analyze_custom_queries_javascript_duration_ms?: number;
  // Time taken in ms to analyze custom queries for python (or undefined if this language was not analyzed)
  analyze_custom_queries_python_duration_ms?: number;
  // Name of language that errored during analysis (or undefined if no language failed)
  analyze_failure_language?: string;
}

async function setupPythonExtractor(logger: Logger) {
  const codeqlPython = process.env["CODEQL_PYTHON"];
  if (codeqlPython === undefined || codeqlPython.length === 0) {
    // If CODEQL_PYTHON is not set, no dependencies were installed, so we don't need to do anything
    return;
  }

  let output = "";
  const options = {
    listeners: {
      stdout: (data: Buffer) => {
        output += data.toString();
      },
    },
  };

  await new toolrunner.ToolRunner(
    codeqlPython,
    [
      "-c",
      "import os; import pip; print(os.path.dirname(os.path.dirname(pip.__file__)))",
    ],
    options
  ).exec();
  logger.info(`Setting LGTM_INDEX_IMPORT_PATH=${output}`);
  process.env["LGTM_INDEX_IMPORT_PATH"] = output;

  output = "";
  await new toolrunner.ToolRunner(
    codeqlPython,
    ["-c", "import sys; print(sys.version_info[0])"],
    options
  ).exec();
  logger.info(`Setting LGTM_PYTHON_SETUP_VERSION=${output}`);
  process.env["LGTM_PYTHON_SETUP_VERSION"] = output;
}

async function createdDBForScannedLanguages(
  config: configUtils.Config,
  logger: Logger
) {
  // Insert the LGTM_INDEX_X env vars at this point so they are set when
  // we extract any scanned languages.
  analysisPaths.includeAndExcludeAnalysisPaths(config);

  const codeql = getCodeQL(config.codeQLCmd);
  for (const language of config.languages) {
    if (isScannedLanguage(language)) {
      logger.startGroup(`Extracting ${language}`);

      if (language === Language.python) {
        await setupPythonExtractor(logger);
      }

      await codeql.extractScannedLanguage(
        util.getCodeQLDatabasePath(config.tempDir, language),
        language
      );
      logger.endGroup();
    }
  }
}

async function finalizeDatabaseCreation(
  config: configUtils.Config,
  threadsFlag: string,
  logger: Logger
) {
  await createdDBForScannedLanguages(config, logger);

  const codeql = getCodeQL(config.codeQLCmd);
  for (const language of config.languages) {
    logger.startGroup(`Finalizing ${language}`);
    await codeql.finalizeDatabase(
      util.getCodeQLDatabasePath(config.tempDir, language),
      threadsFlag
    );
    logger.endGroup();
  }
}

// Runs queries and creates sarif files in the given folder
export async function runQueries(
  sarifFolder: string,
  memoryFlag: string,
  addSnippetsFlag: string,
  threadsFlag: string,
  config: configUtils.Config,
  logger: Logger
): Promise<QueriesStatusReport> {
  const statusReport: QueriesStatusReport = {};

  // count the number of lines in the background
  const locPromise = countLoc(
    path.resolve(),
    // config.paths specifies external directories. the current
    // directory is included in the analysis by default. Replicate
    // that here.
    config.paths,
    config.pathsIgnore,
    config.languages,
    logger
  );

  for (const language of config.languages) {
    logger.startGroup(`Analyzing ${language}`);

    const queries = config.queries[language];
    if (queries.builtin.length === 0 && queries.custom.length === 0) {
      throw new Error(
        `Unable to analyse ${language} as no queries were selected for this language`
      );
    }

    try {
      if (queries["builtin"].length > 0) {
        const startTimeBuliltIn = new Date().getTime();
        const sarifFile = await runQueryGroup(
          language,
          "builtin",
          queries["builtin"],
          sarifFolder,
          undefined
        );
        await injectLinesOfCode(sarifFile, language, locPromise);

        statusReport[`analyze_builtin_queries_${language}_duration_ms`] =
          new Date().getTime() - startTimeBuliltIn;
      }
      const startTimeCustom = new Date().getTime();
      const temporarySarifDir = config.tempDir;
      const temporarySarifFiles: string[] = [];
      for (let i = 0; i < queries["custom"].length; ++i) {
        if (queries["custom"][i].queries.length > 0) {
          const sarifFile = await runQueryGroup(
            language,
            `custom-${i}`,
            queries["custom"][i].queries,
            temporarySarifDir,
            queries["custom"][i].searchPath
          );
          temporarySarifFiles.push(sarifFile);
        }
      }
      if (temporarySarifFiles.length > 0) {
        const sarifFile = path.join(sarifFolder, `${language}-custom.sarif`);
        fs.writeFileSync(sarifFile, combineSarifFiles(temporarySarifFiles));
        await injectLinesOfCode(sarifFile, language, locPromise);

        statusReport[`analyze_custom_queries_${language}_duration_ms`] =
          new Date().getTime() - startTimeCustom;
      }
    } catch (e) {
      logger.info(e);
      statusReport.analyze_failure_language = language;
      throw new CodeQLAnalysisError(
        statusReport,
        `Error running analysis for ${language}: ${e}`
      );
    }
  }

  return statusReport;

  async function runQueryGroup(
    language: Language,
    type: string,
    queries: string[],
    destinationFolder: string,
    searchPath: string | undefined
  ): Promise<string> {
    const databasePath = util.getCodeQLDatabasePath(config.tempDir, language);
    // Pass the queries to codeql using a file instead of using the command
    // line to avoid command line length restrictions, particularly on windows.
    const querySuitePath = `${databasePath}-queries-${type}.qls`;
    const querySuiteContents = queries
      .map((q: string) => `- query: ${q}`)
      .join("\n");
    fs.writeFileSync(querySuitePath, querySuiteContents);
    logger.debug(`Query suite file for ${language}...\n${querySuiteContents}`);

    const sarifFile = path.join(destinationFolder, `${language}-${type}.sarif`);

    const codeql = getCodeQL(config.codeQLCmd);
    await codeql.databaseAnalyze(
      databasePath,
      sarifFile,
      searchPath,
      querySuitePath,
      memoryFlag,
      addSnippetsFlag,
      threadsFlag
    );

    logger.debug(
      `SARIF results for database ${language} created at "${sarifFile}"`
    );
    logger.endGroup();

    return sarifFile;
  }
}

export async function runAnalyze(
  outputDir: string,
  memoryFlag: string,
  addSnippetsFlag: string,
  threadsFlag: string,
  config: configUtils.Config,
  logger: Logger
): Promise<QueriesStatusReport> {
  // Delete the tracer config env var to avoid tracing ourselves
  delete process.env[sharedEnv.ODASA_TRACER_CONFIGURATION];

  fs.mkdirSync(outputDir, { recursive: true });

  logger.info("Finalizing database creation");
  await finalizeDatabaseCreation(config, threadsFlag, logger);

  logger.info("Analyzing database");
  const queriesStats = await runQueries(
    outputDir,
    memoryFlag,
    addSnippetsFlag,
    threadsFlag,
    config,
    logger
  );

  return { ...queriesStats };
}

async function injectLinesOfCode(
  sarifFile: string,
  language: string,
  locPromise: Promise<Record<string, number>>
) {
  const lineCounts = await locPromise;
  if (language in lineCounts) {
    const sarif = JSON.parse(fs.readFileSync(sarifFile, "utf8"));
    if (Array.isArray(sarif.runs)) {
      for (const run of sarif.runs) {
        const metricId = `${language}/summary/lines-of-code`;
        run.properties = run.properties || {};
        run.properties.metricResults = run.properties.metricResults || [];
        const metric = run.properties.metricResults.find(
          // the metric id can be in either of two places
          (m) => m.metricId === metricId || m.metric?.id === metricId
        );
        // only add the baseline value if the metric already exists
        if (metric) {
          metric.baseline = lineCounts[language];
        }
      }
    }
    fs.writeFileSync(sarifFile, JSON.stringify(sarif));
  }
}