update

package/node_modules/@npmcli/arborist/lib/override-set.js

@@ -0,0 +1,147 @@
+const npa = require('npm-package-arg')
+const semver = require('semver')
+
+class OverrideSet {
+  constructor ({ overrides, key, parent }) {
+    this.parent = parent
+    this.children = new Map()
+
+    if (typeof overrides === 'string') {
+      overrides = { '.': overrides }
+    }
+
+    // change a literal empty string to * so we can use truthiness checks on
+    // the value property later
+    if (overrides['.'] === '') {
+      overrides['.'] = '*'
+    }
+
+    if (parent) {
+      const spec = npa(key)
+      if (!spec.name) {
+        throw new Error(`Override without name: ${key}`)
+      }
+
+      this.name = spec.name
+      spec.name = ''
+      this.key = key
+      this.keySpec = spec.toString()
+      this.value = overrides['.'] || this.keySpec
+    }
+
+    for (const [key, childOverrides] of Object.entries(overrides)) {
+      if (key === '.') {
+        continue
+      }
+
+      const child = new OverrideSet({
+        parent: this,
+        key,
+        overrides: childOverrides,
+      })
+
+      this.children.set(child.key, child)
+    }
+  }
+
+  getEdgeRule (edge) {
+    for (const rule of this.ruleset.values()) {
+      if (rule.name !== edge.name) {
+        continue
+      }
+
+      // if keySpec is * we found our override
+      if (rule.keySpec === '*') {
+        return rule
+      }
+
+      let spec = npa(`${edge.name}@${edge.spec}`)
+      if (spec.type === 'alias') {
+        spec = spec.subSpec
+      }
+
+      if (spec.type === 'git') {
+        if (spec.gitRange && semver.intersects(spec.gitRange, rule.keySpec)) {
+          return rule
+        }
+
+        continue
+      }
+
+      if (spec.type === 'range' || spec.type === 'version') {
+        if (semver.intersects(spec.fetchSpec, rule.keySpec)) {
+          return rule
+        }
+
+        continue
+      }
+
+      // if we got this far, the spec type is one of tag, directory or file
+      // which means we have no real way to make version comparisons, so we
+      // just accept the override
+      return rule
+    }
+
+    return this
+  }
+
+  getNodeRule (node) {
+    for (const rule of this.ruleset.values()) {
+      if (rule.name !== node.name) {
+        continue
+      }
+
+      if (semver.satisfies(node.version, rule.keySpec) ||
+        semver.satisfies(node.version, rule.value)) {
+        return rule
+      }
+    }
+
+    return this
+  }
+
+  getMatchingRule (node) {
+    for (const rule of this.ruleset.values()) {
+      if (rule.name !== node.name) {
+        continue
+      }
+
+      if (semver.satisfies(node.version, rule.keySpec) ||
+        semver.satisfies(node.version, rule.value)) {
+        return rule
+      }
+    }
+
+    return null
+  }
+
+  * ancestry () {
+    for (let ancestor = this; ancestor; ancestor = ancestor.parent) {
+      yield ancestor
+    }
+  }
+
+  get isRoot () {
+    return !this.parent
+  }
+
+  get ruleset () {
+    const ruleset = new Map()
+
+    for (const override of this.ancestry()) {
+      for (const kid of override.children.values()) {
+        if (!ruleset.has(kid.key)) {
+          ruleset.set(kid.key, kid)
+        }
+      }
+
+      if (!override.isRoot && !ruleset.has(override.key)) {
+        ruleset.set(override.key, override)
+      }
+    }
+
+    return ruleset
+  }
+}
+
+module.exports = OverrideSet