snyk-nodejs-lockfile-parser
Version:
Generate a dep tree given a lockfile
57 lines • 3.03 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.buildDepGraphYarnLockV1SimpleCyclesPruned = void 0;
const dep_graph_1 = require("@snyk/dep-graph");
const util_1 = require("../util");
const event_loop_spinner_1 = require("event-loop-spinner");
var Color;
(function (Color) {
Color[Color["GRAY"] = 0] = "GRAY";
Color[Color["BLACK"] = 1] = "BLACK";
})(Color || (Color = {}));
const buildDepGraphYarnLockV1SimpleCyclesPruned = async (extractedYarnLockV1Pkgs, pkgJson, options) => {
const { includeDevDeps, strictOutOfSync, includeOptionalDeps } = options;
const depGraphBuilder = new dep_graph_1.DepGraphBuilder({ name: 'yarn' }, { name: pkgJson.name, version: pkgJson.version });
const colorMap = {};
const topLevelDeps = (0, util_1.getTopLevelDeps)(pkgJson, { includeDevDeps });
const rootNode = {
id: 'root-node',
name: pkgJson.name,
version: pkgJson.version,
dependencies: topLevelDeps,
isDev: false,
};
await dfsVisit(depGraphBuilder, rootNode, colorMap, extractedYarnLockV1Pkgs, strictOutOfSync, includeOptionalDeps);
return depGraphBuilder.build();
};
exports.buildDepGraphYarnLockV1SimpleCyclesPruned = buildDepGraphYarnLockV1SimpleCyclesPruned;
/**
* Use DFS to add all nodes and edges to the depGraphBuilder and prune cyclic nodes.
* The colorMap keep track of the state of node during traversal.
* - If a node doesn't exist in the map, it means it hasn't been visited.
* - If a node is GRAY, it means it has already been discovered but its subtree hasn't been fully traversed.
* - If a node is BLACK, it means its subtree has already been fully traversed.
* - When first exploring an edge, if it points to a GRAY node, a cycle is found and the GRAY node is pruned.
* - A pruned node has id `${originalId}|1`
*/
const dfsVisit = async (depGraphBuilder, node, colorMap, extractedYarnLockV1Pkgs, strictOutOfSync, includeOptionalDeps) => {
colorMap[node.id] = Color.GRAY;
for (const [name, depInfo] of Object.entries(node.dependencies || {})) {
if (event_loop_spinner_1.eventLoopSpinner.isStarving()) {
await event_loop_spinner_1.eventLoopSpinner.spin();
}
const childNode = (0, util_1.getChildNode)(name, depInfo, extractedYarnLockV1Pkgs, strictOutOfSync, includeOptionalDeps);
if (!colorMap.hasOwnProperty(childNode.id)) {
(0, util_1.addPkgNodeToGraph)(depGraphBuilder, childNode, {});
await dfsVisit(depGraphBuilder, childNode, colorMap, extractedYarnLockV1Pkgs, strictOutOfSync, includeOptionalDeps);
}
else if (colorMap[childNode.id] === Color.GRAY) {
// cycle detected
childNode.id = `${childNode.id}:pruned`;
(0, util_1.addPkgNodeToGraph)(depGraphBuilder, childNode, { isCyclic: true });
}
depGraphBuilder.connectDep(node.id, childNode.id);
}
colorMap[node.id] = Color.BLACK;
};
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