/proc/2/root/var/lang/lib/node_modules/npm/node_modules/@npmcli/arborist/lib
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// when an optional dep fails to install, we need to remove the branch of the// graph up to the first optionalDependencies, as well as any nodes that are// only required by other nodes in the set.//// This function finds the set of nodes that will need to be removed in that// case.//// Note that this is *only* going to work with trees where calcDepFlags// has been called, because we rely on the node.optional flag. const gatherDepSet = require('./gather-dep-set.js')const optionalSet = node => { // start with the node, then walk up the dependency graph until we // get to the boundaries that define the optional set. since the // node is optional, we know that all paths INTO this area of the // graph are optional, but there may be non-optional dependencies // WITHIN the area. const set = new Set([node]) for (const node of set) { for (const edge of node.edgesIn) { if (!edge.optional) { set.add(edge.from) } } } // now that we've hit the boundary, gather the rest of the nodes in // the optional section that don't have dependents outside the set. return gatherDepSet(set, edge => !set.has(edge.to) && !edge.from?.inert)} module.exports = optionalSet