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