72 lines
2.5 KiB
JavaScript
72 lines
2.5 KiB
JavaScript
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// this is called when an ERESOLVE error is caught in the exit-handler,
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// or when there's a log.warn('eresolve', msg, explanation), to turn it
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// into a human-intelligible explanation of what's wrong and how to fix.
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const { explainEdge, explainNode, printNode } = require('./explain-dep.js')
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// expl is an explanation object that comes from Arborist. It looks like:
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// Depth is how far we want to want to descend into the object making a report.
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// The full report (ie, depth=Infinity) is always written to the cache folder
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// at ${cache}/eresolve-report.txt along with full json.
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const explain = (expl, color, depth) => {
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const { edge, dep, current, peerConflict, currentEdge } = expl
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const out = []
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const whileInstalling = dep && dep.whileInstalling ||
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current && current.whileInstalling ||
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edge && edge.from && edge.from.whileInstalling
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if (whileInstalling) {
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out.push('While resolving: ' + printNode(whileInstalling, color))
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}
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// it "should" be impossible for an ERESOLVE explanation to lack both
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// current and currentEdge, but better to have a less helpful error
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// than a crashing failure.
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if (current) {
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out.push('Found: ' + explainNode(current, depth, color))
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} else if (peerConflict && peerConflict.current) {
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out.push('Found: ' + explainNode(peerConflict.current, depth, color))
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} else if (currentEdge) {
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out.push('Found: ' + explainEdge(currentEdge, depth, color))
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} else /* istanbul ignore else - should always have one */ if (edge) {
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out.push('Found: ' + explainEdge(edge, depth, color))
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}
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out.push('\nCould not resolve dependency:\n' +
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explainEdge(edge, depth, color))
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if (peerConflict) {
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const heading = '\nConflicting peer dependency:'
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const pc = explainNode(peerConflict.peer, depth, color)
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out.push(heading + ' ' + pc)
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}
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return out.join('\n')
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}
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// generate a full verbose report and tell the user how to fix it
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const report = (expl, color) => {
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const flags = [
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expl.strictPeerDeps ? '--no-strict-peer-deps' : '',
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'--force',
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'--legacy-peer-deps',
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].filter(Boolean)
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const or = (arr) => arr.length <= 2
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? arr.join(' or ') :
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arr.map((v, i, l) => i + 1 === l.length ? `or ${v}` : v).join(', ')
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const fix = `Fix the upstream dependency conflict, or retry
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this command with ${or(flags)}
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to accept an incorrect (and potentially broken) dependency resolution.`
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return {
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explanation: `${explain(expl, color, 4)}\n\n${fix}`,
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file: `# npm resolution error report\n\n${explain(expl, false, Infinity)}\n\n${fix}`,
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}
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}
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module.exports = {
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explain,
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report,
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}
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