Updated the files.

my-app/node_modules/ajv/lib/vocabularies/applicator/dependencies.ts

@@ -0,0 +1,112 @@
+import type {
+  CodeKeywordDefinition,
+  ErrorObject,
+  KeywordErrorDefinition,
+  SchemaMap,
+  AnySchema,
+} from "../../types"
+import type {KeywordCxt} from "../../compile/validate"
+import {_, str} from "../../compile/codegen"
+import {alwaysValidSchema} from "../../compile/util"
+import {checkReportMissingProp, checkMissingProp, reportMissingProp, propertyInData} from "../code"
+
+export type PropertyDependencies = {[K in string]?: string[]}
+
+export interface DependenciesErrorParams {
+  property: string
+  missingProperty: string
+  depsCount: number
+  deps: string // TODO change to string[]
+}
+
+type SchemaDependencies = SchemaMap
+
+export type DependenciesError = ErrorObject<
+  "dependencies",
+  DependenciesErrorParams,
+  {[K in string]?: string[] | AnySchema}
+>
+
+export const error: KeywordErrorDefinition = {
+  message: ({params: {property, depsCount, deps}}) => {
+    const property_ies = depsCount === 1 ? "property" : "properties"
+    return str`must have ${property_ies} ${deps} when property ${property} is present`
+  },
+  params: ({params: {property, depsCount, deps, missingProperty}}) =>
+    _`{property: ${property},
+    missingProperty: ${missingProperty},
+    depsCount: ${depsCount},
+    deps: ${deps}}`, // TODO change to reference
+}
+
+const def: CodeKeywordDefinition = {
+  keyword: "dependencies",
+  type: "object",
+  schemaType: "object",
+  error,
+  code(cxt: KeywordCxt) {
+    const [propDeps, schDeps] = splitDependencies(cxt)
+    validatePropertyDeps(cxt, propDeps)
+    validateSchemaDeps(cxt, schDeps)
+  },
+}
+
+function splitDependencies({schema}: KeywordCxt): [PropertyDependencies, SchemaDependencies] {
+  const propertyDeps: PropertyDependencies = {}
+  const schemaDeps: SchemaDependencies = {}
+  for (const key in schema) {
+    if (key === "__proto__") continue
+    const deps = Array.isArray(schema[key]) ? propertyDeps : schemaDeps
+    deps[key] = schema[key]
+  }
+  return [propertyDeps, schemaDeps]
+}
+
+export function validatePropertyDeps(
+  cxt: KeywordCxt,
+  propertyDeps: {[K in string]?: string[]} = cxt.schema
+): void {
+  const {gen, data, it} = cxt
+  if (Object.keys(propertyDeps).length === 0) return
+  const missing = gen.let("missing")
+  for (const prop in propertyDeps) {
+    const deps = propertyDeps[prop] as string[]
+    if (deps.length === 0) continue
+    const hasProperty = propertyInData(gen, data, prop, it.opts.ownProperties)
+    cxt.setParams({
+      property: prop,
+      depsCount: deps.length,
+      deps: deps.join(", "),
+    })
+    if (it.allErrors) {
+      gen.if(hasProperty, () => {
+        for (const depProp of deps) {
+          checkReportMissingProp(cxt, depProp)
+        }
+      })
+    } else {
+      gen.if(_`${hasProperty} && (${checkMissingProp(cxt, deps, missing)})`)
+      reportMissingProp(cxt, missing)
+      gen.else()
+    }
+  }
+}
+
+export function validateSchemaDeps(cxt: KeywordCxt, schemaDeps: SchemaMap = cxt.schema): void {
+  const {gen, data, keyword, it} = cxt
+  const valid = gen.name("valid")
+  for (const prop in schemaDeps) {
+    if (alwaysValidSchema(it, schemaDeps[prop] as AnySchema)) continue
+    gen.if(
+      propertyInData(gen, data, prop, it.opts.ownProperties),
+      () => {
+        const schCxt = cxt.subschema({keyword, schemaProp: prop}, valid)
+        cxt.mergeValidEvaluated(schCxt, valid)
+      },
+      () => gen.var(valid, true) // TODO var
+    )
+    cxt.ok(valid)
+  }
+}
+
+export default def