codeql-action/lib/feature-flags.js

"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
exports.createFeatureFlags = exports.Features = exports.featureConfig = exports.Feature = void 0;
const api_client_1 = require("./api-client");
const util = __importStar(require("./util"));
var Feature;
(function (Feature) {
    Feature["BypassToolcacheEnabled"] = "bypass_toolcache_enabled";
    Feature["MlPoweredQueriesEnabled"] = "ml_powered_queries_enabled";
    Feature["TrapCachingEnabled"] = "trap_caching_enabled";
    Feature["GolangExtractionReconciliationEnabled"] = "golang_extraction_reconciliation_enabled";
    Feature["CliConfigFileEnabled"] = "cli_config_file_enabled";
})(Feature = exports.Feature || (exports.Feature = {}));
exports.featureConfig = {
    [Feature.BypassToolcacheEnabled]: {
        envVar: "CODEQL_BYPASS_TOOLCACHE",
        minimumVersion: undefined,
    },
    [Feature.MlPoweredQueriesEnabled]: {
        envVar: "CODEQL_ML_POWERED_QUERIES",
        minimumVersion: "2.7.5",
    },
    [Feature.TrapCachingEnabled]: {
        envVar: "CODEQL_TRAP_CACHING",
        minimumVersion: undefined,
    },
    [Feature.GolangExtractionReconciliationEnabled]: {
        envVar: "CODEQL_GOLANG_EXTRACTION_RECONCILIATION",
        minimumVersion: undefined,
    },
    [Feature.CliConfigFileEnabled]: {
        envVar: "CODEQL_PASS_CONFIG_TO_CLI",
        minimumVersion: "2.10.1",
    },
};
/**
 * Determines the enablement status of a number of features.
 * If feature enablement is not able to be determined locally, a request to the
 * github API is made to determine the enablement status.
 */
class Features {
    constructor(gitHubVersion, apiDetails, repositoryNwo, logger) {
        this.gitHubFeatureFlags = new GitHubFeatureFlags(gitHubVersion, apiDetails, repositoryNwo, logger);
    }
    /**
     *
     * @param flag The feature flag to check.
     * @param codeql An optional CodeQL object. If provided, and a `minimumVersion` is specified for the
     *        feature flag, the version of the CodeQL CLI will be checked against the minimum version.
     *        If the version is less than the minimum version, the feature flag will be considered
     *        disabled. If not provided, and a `minimumVersion` is specified for the feature flag, the
     *        this function will throw.
     * @returns true if the feature flag is enabled, false otherwise.
     *
     * @throws if a `minimumVersion` is specified for the feature flag, and `codeql` is not provided.
     */
    async getValue(flag, codeql) {
        if (!codeql && exports.featureConfig[flag].minimumVersion) {
            throw new Error(`Internal error: A minimum version is specified for feature flag ${flag}, but no instance of CodeQL was provided.`);
        }
        // Bypassing the toolcache is disabled in test mode.
        if (flag === Feature.BypassToolcacheEnabled && util.isInTestMode()) {
            return false;
        }
        const envVar = (process.env[exports.featureConfig[flag].envVar] || "").toLocaleLowerCase();
        // Do not use this feature if user explicitly disables it via an environment variable.
        if (envVar === "false") {
            return false;
        }
        // Never use this feature if the CLI version explicitly can't support it.
        const minimumVersion = exports.featureConfig[flag].minimumVersion;
        if (codeql && minimumVersion) {
            if (!(await util.codeQlVersionAbove(codeql, minimumVersion))) {
                return false;
            }
        }
        // Use this feature if user explicitly enables it via an environment variable.
        if (envVar === "true") {
            return true;
        }
        // Ask the GitHub API if the feature is enabled.
        return await this.gitHubFeatureFlags.getValue(flag);
    }
}
exports.Features = Features;
class GitHubFeatureFlags {
    constructor(gitHubVersion, apiDetails, repositoryNwo, logger) {
        this.gitHubVersion = gitHubVersion;
        this.apiDetails = apiDetails;
        this.repositoryNwo = repositoryNwo;
        this.logger = logger;
        /**/
    }
    async getValue(flag) {
        const response = await this.getApiResponse();
        if (response === undefined) {
            this.logger.debug(`No feature flags API response for ${flag}, considering it disabled.`);
            return false;
        }
        const flagValue = response[flag];
        if (flagValue === undefined) {
            this.logger.debug(`Feature flag '${flag}' undefined in API response, considering it disabled.`);
            return false;
        }
        return flagValue || false;
    }
    async getApiResponse() {
        const apiResponse = this.cachedApiResponse || (await this.loadApiResponse());
        this.cachedApiResponse = apiResponse;
        return apiResponse;
    }
    async loadApiResponse() {
        // Do nothing when not running against github.com
        if (this.gitHubVersion.type !== util.GitHubVariant.DOTCOM) {
            this.logger.debug("Not running against github.com. Disabling all feature flags.");
            return {};
        }
        const client = (0, api_client_1.getApiClient)(this.apiDetails);
        try {
            const response = await client.request("GET /repos/:owner/:repo/code-scanning/codeql-action/features", {
                owner: this.repositoryNwo.owner,
                repo: this.repositoryNwo.repo,
            });
            return response.data;
        }
        catch (e) {
            if (util.isHTTPError(e) && e.status === 403) {
                this.logger.warning("This run of the CodeQL Action does not have permission to access Code Scanning API endpoints. " +
                    "As a result, it will not be opted into any experimental features. " +
                    "This could be because the Action is running on a pull request from a fork. If not, " +
                    `please ensure the Action has the 'security-events: write' permission. Details: ${e}`);
            }
            else {
                // Some feature flags, such as `ml_powered_queries_enabled` affect the produced alerts.
                // Considering these feature flags disabled in the event of a transient error could
                // therefore lead to alert churn. As a result, we crash if we cannot determine the value of
                // the feature flags.
                throw new Error(`Encountered an error while trying to load feature flags: ${e}`);
            }
        }
    }
}
/**
 * Create a feature flags instance with the specified set of enabled flags.
 *
 * This should be only used within tests.
 */
function createFeatureFlags(enabledFlags) {
    return {
        getValue: async (flag) => {
            return enabledFlags.includes(flag);
        },
    };
}
exports.createFeatureFlags = createFeatureFlags;
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