Unable to run "prepare" script

[jclem]

With Node 18.12.0 (LTS) and npm 8.19.2, I am unable to run the "prepare" script in this repository. Is there a specific combination of Node and npm expected, or perhaps a different package manager altogether?

Since this repository doesn't include a package lockfile, I'm also curious if a breaking change in some dependency isn't causing this. Does it make sense to check a lockfile in, as is common for npm package development?

Context I am considering modifying this package for more robust Markdown parsing in a product using CodeMirror. For example, the current parser does not differentiate between Markdown header content and whitespace (i.e. it parses separately {##}{ Content}, but I need it to parse {##}{ }{Content}).

View error output

~/s/g/l/markdown → npm i                                                                                                                                            (main → …1)

> @lezer/markdown@1.0.2 prepare
> rollup -c rollup.config.js

Error loading `tslib` helper library.
[!] Error: Package subpath './package.json' is not defined by "exports" in /Users/jclem/src/github.com/lezer-parser/markdown/node_modules/tslib/package.json
Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: Package subpath './package.json' is not defined by "exports" in /Users/jclem/src/github.com/lezer-parser/markdown/node_modules/tslib/package.json
    at new NodeError (node:internal/errors:393:5)
    at throwExportsNotFound (node:internal/modules/esm/resolve:358:9)
    at packageExportsResolve (node:internal/modules/esm/resolve:668:3)
    at resolveExports (node:internal/modules/cjs/loader:522:36)
    at Module._findPath (node:internal/modules/cjs/loader:562:31)
    at Module._resolveFilename (node:internal/modules/cjs/loader:971:27)
    at Module._load (node:internal/modules/cjs/loader:833:27)
    at Module.require (node:internal/modules/cjs/loader:1051:19)
    at require (node:internal/modules/cjs/helpers:103:18)
    at Object.<anonymous> (/Users/jclem/src/github.com/lezer-parser/markdown/node_modules/rollup-plugin-typescript2/dist/rollup-plugin-typescript2.cjs.js:25170:26)

npm ERR! code 1
npm ERR! path /Users/jclem/src/github.com/lezer-parser/markdown
npm ERR! command failed
npm ERR! command sh -c -- rollup -c rollup.config.js

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/jclem/.npm/_logs/2022-11-03T13_31_33_247Z-debug-0.log

[marijnh]

I'm not seeing this with node 16.13.1 and the same npm version. Does using node 16 solve it on your system, or is this something else?

[jclem]

That was it—downgrading to Node 16.x fixed the issue. I'll let you close or update this issue as you deem appropriate. Thank you!

[marijnh]

Well, this seems to be (yet another) bizarre npm behavior — it installs rollup-plugin-typescript2 0.32.0, despite the version range in the package.json using a ^ and there existing a 0.34.1 that doesn't pull in the old tslib that has this issue. Manually setting a higher version seems to solve it.