npm ERR! peer dep missing: ajv@^6.0.0, required by ajv-keywords@3.1.0

[eholland7080]

hello

ENVIRONMENT
macOS: high Sierra 10.13.4
node: v9.9.0
npm: v5.8.0
create-react-app: v1.5.2

STEPS TO REPRODUCE:

1. run create-react-app my-app
2. cd into my-app
3. try and install any npm package or type npm list --depth 0 and see:
   Erics-MacBook-Pro:my-app2 ericholland$ npm list --depth 0
   my-app2@0.1.0 /Users/ericholland/Documents/work/development/react/prototype/my-app2
   ├── react@16.3.0
   ├── react-dom@16.3.0
   └── react-scripts@1.1.1

npm ERR! peer dep missing: ajv@^6.0.0, required by ajv-keywords@3.1.0
Erics-MacBook-Pro:my-app2 ericholland$

- I've looked at /node_modules/ajv/package.json and it looks like 5.2.2 is installed as part of create-react-app:
{
"_from": "ajv@^5.2.0",
"_id": "ajv@5.5.2",
"_inBundle": false,
"_integrity": "sha1-c7Xuyj+rZT49P5Qis0GtQiBdyWU=",
"_location": "/ajv",
"_phantomChildren": {},
"_requested": {
"type": "range",
"registry": true,
"raw": "ajv@^5.2.0",
"name": "ajv",
"escapedName": "ajv",
"rawSpec": "^5.2.0",
"saveSpec": null,
"fetchSpec": "^5.2.0"
},
"_requiredBy": [
"/eslint",
"/har-validator",
"/schema-utils",
"/webpack"
],
"_resolved": "https://registry.npmjs.org/ajv/-/ajv-5.5.2.tgz",
"_shasum": "73b5eeca3fab653e3d3f9422b341ad42205dc965",
"_spec": "ajv@^5.2.0",
"_where": "/Users/ericholland/Documents/work/development/react/prototype/my-app3/node_modules/eslint",
"author": {
"name": "Evgeny Poberezkin"
},
"bugs": {
"url": "https://github.com/epoberezkin/ajv/issues"
},
"bundleDependencies": false,
"dependencies": {
"co": "^4.6.0",
"fast-deep-equal": "^1.0.0",
"fast-json-stable-stringify": "^2.0.0",
"json-schema-traverse": "^0.3.0"
},
"deprecated": false,
"description": "Another JSON Schema Validator",
"devDependencies": {
"ajv-async": "^0.1.0",
"bluebird": "^3.1.5",
"brfs": "^1.4.3",
"browserify": "^14.1.0",
"chai": "^4.0.1",
"coveralls": "^3.0.0",
"del-cli": "^1.1.0",
"dot": "^1.0.3",
"eslint": "^4.1.0",
"gh-pages-generator": "^0.2.0",
"glob": "^7.0.0",
"if-node-version": "^1.0.0",
"js-beautify": "^1.7.3",
"jshint": "^2.9.4",
"json-schema-test": "^2.0.0",
"karma": "^1.0.0",
"karma-chrome-launcher": "^2.0.0",
"karma-mocha": "^1.1.1",
"karma-phantomjs-launcher": "^1.0.0",
"karma-sauce-launcher": "^1.1.0",
"mocha": "^4.0.0",
"nodent": "^3.0.17",
"nyc": "^11.0.2",
"phantomjs-prebuilt": "^2.1.4",
"pre-commit": "^1.1.1",
"regenerator": "^0.12.2",
"require-globify": "^1.3.0",
"typescript": "^2.6.2",
"uglify-js": "^3.1.5",
"watch": "^1.0.0"
},
"files": [
"lib/",
"dist/",
"scripts/",
"LICENSE",
".tonic_example.js"
],
"homepage": "https://github.com/epoberezkin/ajv",
"keywords": [
"JSON",
"schema",
"validator",
"validation",
"jsonschema",
"json-schema",
"json-schema-validator",
"json-schema-validation"
],
"license": "MIT",
"main": "lib/ajv.js",
"name": "ajv",
"nyc": {
"exclude": [
"/spec/",
"node_modules"
],
"reporter": [
"lcov",
"text-summary"
]
},
"repository": {
"type": "git",
"url": "git+https://github.com/epoberezkin/ajv.git"
},
"scripts": {
"build": "del-cli lib/dotjs/.js && node scripts/compile-dots.js",
"bundle": "node ./scripts/bundle.js . Ajv pure_getters",
"bundle-all": "del-cli dist && npm run bundle && npm run bundle-regenerator && npm run bundle-nodent",
"bundle-beautify": "node ./scripts/bundle.js js-beautify",
"bundle-nodent": "node ./scripts/bundle.js nodent",
"bundle-regenerator": "node ./scripts/bundle.js regenerator",
"eslint": "if-node-version ">=4" eslint lib/.js lib/compile/.js spec/.js scripts",
"jshint": "jshint lib/.js lib/**/.js --exclude lib/dotjs/**/",
"prepublish": "npm run build && npm run bundle-all",
"test": "npm run jshint && npm run eslint && npm run test-ts && npm run build && npm run test-cov && if-node-version 4 npm run test-browser",
"test-browser": "del-cli .browser && npm run bundle-all && scripts/prepare-tests && npm run test-karma",
"test-cov": "nyc npm run test-spec",
"test-debug": "mocha spec/.spec.js --debug-brk -R spec",
"test-fast": "AJV_FAST_TEST=true npm run test-spec",
"test-karma": "karma start --single-run --browsers PhantomJS",
"test-spec": "mocha spec/*.spec.js -R spec $(if-node-version 7 echo --harmony-async-await)",
"test-ts": "tsc --target ES5 --noImplicitAny lib/ajv.d.ts",
"watch": "watch 'npm run build' ./lib/dot"
},
"tonicExampleFilename": ".tonic_example.js",
"typings": "lib/ajv.d.ts",
"version": "5.5.2"
}

- I've looked at /node_modules/ajv/package.json and it does require ajv 6.0.0 as dep:
"_from": "ajv-keywords@^3.0.0",
"_id": "ajv-keywords@3.1.0",
"_inBundle": false,
"_integrity": "sha1-rCsnk5xUPpXSwG5/f1wnvkqlQ74=",
"_location": "/ajv-keywords",
"_phantomChildren": {},
"_requested": {
"type": "range",
"registry": true,
"raw": "ajv-keywords@^3.0.0",
"name": "ajv-keywords",
"escapedName": "ajv-keywords",
"rawSpec": "^3.0.0",
"saveSpec": null,
"fetchSpec": "^3.0.0"
},
"_requiredBy": [
"/table"
],
"_resolved": "https://registry.npmjs.org/ajv-keywords/-/ajv-keywords-3.1.0.tgz",
"_shasum": "ac2b27939c543e95d2c06e7f7f5c27be4aa543be",
"_spec": "ajv-keywords@^3.0.0",
"_where": "/Users/ericholland/Documents/work/development/react/prototype/my-app3/node_modules/table",
"author": {
"name": "Evgeny Poberezkin"
},
"bugs": {
"url": "https://github.com/epoberezkin/ajv-keywords/issues"
},
"bundleDependencies": false,
"deprecated": false,
"description": "Custom JSON-Schema keywords for Ajv validator",
"devDependencies": {
"ajv": "^6.0.0",
"ajv-pack": "^0.3.0",
"chai": "^4.0.2",
"coveralls": "^3.0.0",
"dot": "^1.1.1",
"eslint": "^4.9.0",
"glob": "^7.1.1",
"istanbul": "^0.4.3",
"js-beautify": "^1.7.4",
"json-schema-test": "^2.0.0",
"mocha": "^4.0.0",
"pre-commit": "^1.1.3",
"uuid": "^3.0.1"
},
"files": [
"index.js",
"keywords"
],
"homepage": "https://github.com/epoberezkin/ajv-keywords#readme",
"keywords": [
"JSON-Schema",
"ajv",
"keywords"
],
"license": "MIT",
"main": "index.js",
"name": "ajv-keywords",
"peerDependencies": {
"ajv": "^6.0.0"
},
"repository": {
"type": "git",
"url": "git+https://github.com/epoberezkin/ajv-keywords.git"
},
"scripts": {
"build": "node node_modules/ajv/scripts/compile-dots.js node_modules/ajv/lib keywords",
"eslint": "eslint index.js keywords/.js",
"prepublish": "npm run build",
"test": "npm run build && npm run eslint && npm run test-cov",
"test-cov": "istanbul cover -x 'spec/**' node_modules/mocha/bin/_mocha -- spec/.spec.js -R spec",
"test-spec": "mocha spec/*.spec.js -R spec"
},
"version": "3.1.0"
}

I know by running npm install ajv it installs 6.4.0 and the warning / error goes away, but that doesn't feel like the best way. What is the best way to resolve this?

thanks
Eric

[Fasani]

I have the same issue. Wondering the same:

I know by running npm install ajv it installs 6.4.0 and the warning / error goes away, but that doesn't feel like the best way. What is the best way to resolve this?

[gaearon]

What does npm ls ajv-keywords output?

[gaearon]

This looks like an npm bug. npm/npm#19877

I suggest to use Yarn if this is annoying. Seems like Yarn doesn't have this bug.

[eholland7080]

@gaearon good suggestion. I did switch to yarn and did not experience the issue. thank you
Eric

[dojchek]

The error is not visible with yarn, only in 'install' output. If you run yarn check, these errors are still there.