[BUG] Fix ERESOLVE error output

[btmills]

Current Behavior:

When I run npm install in https://github.com/eslint/eslint as of tag v7.22.0, npm throws ERESOLVE with the message "Cannot destructure property 'name' of 'node' as it is null."

Expected Behavior:

Now that #2199 is fixed, I'm hopeful we can successfully npm install in eslint/eslint with npm v7 without --legacy-peer-deps. If we're doing something that's incompatible with the new peerdeps model, a more actionable error message would help.

Steps To Reproduce:

$ node --version
v15.11.0
$ npm --version
7.6.3
$ git clone https://github.com/eslint/eslint.git
$ cd eslint
# Latest version as of writing in case a future commit no longer repros
$ git checkout v7.22.0
$ npm install
npm ERR! code ERESOLVE
npm ERR! Cannot destructure property 'name' of 'node' as it is null.

npm ERR! A complete log of this run can be found in:
npm ERR!     ~/.npm/_logs/2021-03-18T04_10_40_533Z-debug.log

This stack trace matches #2548 (comment).

~/.npm/_logs/2021-03-18T04_10_40_533Z-debug.log

0 verbose cli [ '/usr/local/bin/node', '/usr/local/bin/npm', 'install' ]
1 info using npm@7.6.3
2 info using node@v15.11.0
3 timing config:load:defaults Completed in 2ms
4 timing config:load:file:/usr/local/lib/node_modules/npm/npmrc Completed in 1ms
5 timing config:load:builtin Completed in 1ms
6 timing config:load:cli Completed in 1ms
7 timing config:load:env Completed in 1ms
8 timing config:load:file:~/eslint/.npmrc Completed in 2ms
9 timing config:load:project Completed in 3ms
10 timing config:load:file:~/.npmrc Completed in 0ms
11 timing config:load:user Completed in 0ms
12 timing config:load:file:/usr/local/etc/npmrc Completed in 0ms
13 timing config:load:global Completed in 0ms
14 timing config:load:cafile Completed in 1ms
15 timing config:load:validate Completed in 0ms
16 timing config:load:setUserAgent Completed in 1ms
17 timing config:load:setEnvs Completed in 1ms
18 timing config:load Completed in 11ms
19 verbose npm-session a35acf988004864f
20 timing npm:load Completed in 24ms
21 http fetch GET 200 https://registry.npmjs.org/npm 26ms (from cache)
22 timing arborist:ctor Completed in 1ms
23 timing arborist:ctor Completed in 0ms
24 timing idealTree:init Completed in 17ms
25 timing idealTree:userRequests Completed in 0ms
26 silly idealTree buildDeps
27 silly fetch manifest @babel/core@^7.4.3
28 http fetch GET 200 https://registry.npmjs.org/@babel%2fcore 225ms
29 silly fetch manifest @babel/preset-env@^7.4.3
30 http fetch GET 200 https://registry.npmjs.org/@babel%2fpreset-env 114ms
31 silly fetch manifest acorn@^7.2.0
32 http fetch GET 200 https://registry.npmjs.org/acorn 53ms
33 silly fetch manifest babel-loader@^8.0.5
34 http fetch GET 200 https://registry.npmjs.org/babel-loader 47ms
35 silly fetch manifest webpack@^5.23.0
36 http fetch GET 200 https://registry.npmjs.org/webpack 238ms
37 silly fetch manifest chai@^4.0.1
38 http fetch GET 200 https://registry.npmjs.org/chai 86ms
39 silly fetch manifest cheerio@^0.22.0
40 http fetch GET 200 https://registry.npmjs.org/cheerio 58ms
41 silly fetch manifest common-tags@^1.8.0
42 http fetch GET 200 https://registry.npmjs.org/common-tags 63ms
43 silly fetch manifest core-js@^3.1.3
44 http fetch GET 200 https://registry.npmjs.org/core-js 61ms
45 silly fetch manifest dateformat@^3.0.3
46 http fetch GET 200 https://registry.npmjs.org/dateformat 60ms
47 silly fetch manifest ejs@^3.0.2
48 http fetch GET 200 https://registry.npmjs.org/ejs 71ms
49 silly fetch manifest escape-string-regexp@^3.0.0
50 http fetch GET 200 https://registry.npmjs.org/escape-string-regexp 68ms
51 silly fetch manifest eslint-plugin-eslint-plugin@^2.2.1
52 http fetch GET 200 https://registry.npmjs.org/eslint-plugin-eslint-plugin 51ms
53 silly fetch manifest eslint-plugin-jsdoc@^22.1.0
54 http fetch GET 200 https://registry.npmjs.org/eslint-plugin-jsdoc 56ms
55 silly fetch manifest eslint@^6.0.0
56 http fetch GET 200 https://registry.npmjs.org/eslint 81ms
57 timing idealTree Completed in 1449ms
58 timing command:install Completed in 1462ms
59 verbose stack Error: unable to resolve dependency tree
59 verbose stack     at Arborist.[failPeerConflict] (/usr/local/lib/node_modules/npm/node_modules/@npmcli/arborist/lib/arborist/build-ideal-tree.js:1157:25)
59 verbose stack     at Arborist.[loadPeerSet] (/usr/local/lib/node_modules/npm/node_modules/@npmcli/arborist/lib/arborist/build-ideal-tree.js:1134:34)
59 verbose stack     at async Arborist.[buildDepStep] (/usr/local/lib/node_modules/npm/node_modules/@npmcli/arborist/lib/arborist/build-ideal-tree.js:838:11)
59 verbose stack     at async Arborist.buildIdealTree (/usr/local/lib/node_modules/npm/node_modules/@npmcli/arborist/lib/arborist/build-ideal-tree.js:209:7)
59 verbose stack     at async Promise.all (index 1)
59 verbose stack     at async Arborist.reify (/usr/local/lib/node_modules/npm/node_modules/@npmcli/arborist/lib/arborist/reify.js:131:5)
59 verbose stack     at async Install.install (/usr/local/lib/node_modules/npm/lib/install.js:120:5)
60 verbose cwd ~/eslint
61 verbose Linux 4.19.121-linuxkit
62 verbose argv "/usr/local/bin/node" "/usr/local/bin/npm" "install"
63 verbose node v15.11.0
64 verbose npm  v7.6.3
65 error code ERESOLVE
66 verbose stack TypeError: Cannot destructure property 'name' of 'node' as it is null.
66 verbose stack     at printNode (/usr/local/lib/node_modules/npm/lib/utils/explain-dep.js:29:5)
66 verbose stack     at explainNode (/usr/local/lib/node_modules/npm/lib/utils/explain-dep.js:13:3)
66 verbose stack     at explainEresolve (/usr/local/lib/node_modules/npm/lib/utils/explain-eresolve.js:24:24)
66 verbose stack     at report (/usr/local/lib/node_modules/npm/lib/utils/explain-eresolve.js:50:3)
66 verbose stack     at module.exports (/usr/local/lib/node_modules/npm/lib/utils/error-message.js:22:24)
66 verbose stack     at errorHandler (/usr/local/lib/node_modules/npm/lib/utils/error-handler.js:175:15)
66 verbose stack     at /usr/local/lib/node_modules/npm/lib/npm.js:114:9
67 verbose cwd ~/eslint
68 verbose Linux 4.19.121-linuxkit
69 verbose argv "/usr/local/bin/node" "/usr/local/bin/npm" "install"
70 verbose node v15.11.0
71 verbose npm  v7.6.3
72 error Cannot destructure property 'name' of 'node' as it is null.
73 verbose exit 1

Environment:

• OS: macOS 11.2.3 (Intel) or Docker node:15
• Node: 15.11.0
• npm: 7.6.3

[nlf]

definitely a bug in how we report the ERESOLVE error here

if it helps, the problem is that eslint-plugin-jsdoc@22.2.0 has a peer dependency on eslint@^6.0.0, but eslint@file:. is listed as a dev dependency, which yields eslint 7.22.0 (as in the checked out commit) being linked as a dependency, which conflicts.

the fix would be to update eslint-plugin-jsdoc to have a version with a peer dependency on eslint@^7.0.0 (or some other range compatible with the current release)

[btmills]

That's incredibly helpful. Thank you! I just upgraded eslint-plugin-jsdoc to a version that includes eslint@^7.0.0 in the peer dependency range. That turned out to be the last incompatibility, so we're now able to npm install in eslint/eslint without --legacy-peer-deps! I'll leave this open for the error reporting bug, but we're unblocked now.