Show version mismatch when running upgrade tool #19028
Merged
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters
RobinMalfait commented Sep 29, 2025
Comment on lines +69 to +83
| error( | ||
| [ | ||
| 'Version mismatch', | ||
| '', | ||
| pc.dim('```diff'), | ||
| `${pc.red('-')} ${`${pc.dim('"tailwindcss":')} ${`${pc.dim('"')}${pc.blue(version.expectedTailwindVersion(base))}${pc.dim('"')}`}`} (expected version in package.json / lockfile)`, | ||
| `${pc.green('+')} ${`${pc.dim('"tailwindcss":')} ${`${pc.dim('"')}${pc.blue(version.installedTailwindVersion(base))}${pc.dim('"')}`}`} (installed version in \`node_modules\`)`, | ||
| pc.dim('```'), | ||
| '', | ||
| `Make sure to run ${highlight(`${pkgManager} install`)}, and try again.`, | ||
| ].join('\n'), | ||
| { | ||
| prefix: '↳ ', | ||
| }, | ||
| ) |
Member Author
There was a problem hiding this comment.
Open to suggestions here!
Contributor
There was a problem hiding this comment.
I think i would say "Tailwind CSS version mismatch" but other than that this seems fine to me.
Contributor
There was a problem hiding this comment.
aside: I don't think it needs to change since tailwindcss is also prevent in the diff so if you don't wanna change it that's fine imo. 🤷♂️
Member Author
There was a problem hiding this comment.
I think this is a good change if we want to show more issues. But I used the '↳' as well because it's sort of a continuation of the previous Tailwind CSS version
thecrypticace approved these changes Sep 29, 2025
When splitting `'foo\n\nbar'` by `\n`, you will get `['foo', '', 'bar']`. The `''` value will result in `[]` after the word wrapping. This information gets lost when we `flatMap`, so let's keep the newline using `['']` as the fallback.
This is used for some tests that interact with `git` and have to commit things during tests.
RobinMalfait force-pushed the feat/error-on-version-mismatch branch from eef6bd8 to 11e1d71 Compare This was referenced Oct 21, 2025
ch4og pushed a commit to csmplay/csm-mapban that referenced this pull request Nov 18, 2025
This PR contains the following updates: | Package | Change | Age | Confidence | |---|---|---|---| | [@tailwindcss/postcss](https://tailwindcss.com) ([source](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/@tailwindcss-postcss)) | [`4.1.12` -> `4.1.17`](https://renovatebot.com/diffs/npm/@tailwindcss%2fpostcss/4.1.12/4.1.17) | [](https://docs.renovatebot.com/merge-confidence/) | [](https://docs.renovatebot.com/merge-confidence/) | --- ### Release Notes <details> <summary>tailwindlabs/tailwindcss (@​tailwindcss/postcss)</summary> ### [`v4.1.17`](https://github.com/tailwindlabs/tailwindcss/blob/HEAD/CHANGELOG.md#4117---2025-11-06) [Compare Source](tailwindlabs/tailwindcss@v4.1.16...v4.1.17) ##### Fixed - Substitute `@variant` inside legacy JS APIs ([#​19263](tailwindlabs/tailwindcss#19263)) - Prevent occasional crash on Windows when loaded into a worker thread ([#​19242](tailwindlabs/tailwindcss#19242)) ### [`v4.1.16`](https://github.com/tailwindlabs/tailwindcss/blob/HEAD/CHANGELOG.md#4116---2025-10-23) [Compare Source](tailwindlabs/tailwindcss@v4.1.15...v4.1.16) ##### Fixed - Discard candidates with an empty data type ([#​19172](tailwindlabs/tailwindcss#19172)) - Fix canonicalization of arbitrary variants with attribute selectors ([#​19176](tailwindlabs/tailwindcss#19176)) - Fix invalid colors due to nested `&` ([#​19184](tailwindlabs/tailwindcss#19184)) - Improve canonicalization for `& > :pseudo` and `& :pseudo` arbitrary variants ([#​19178](tailwindlabs/tailwindcss#19178)) ### [`v4.1.15`](https://github.com/tailwindlabs/tailwindcss/blob/HEAD/CHANGELOG.md#4115---2025-10-20) [Compare Source](tailwindlabs/tailwindcss@v4.1.14...v4.1.15) ##### Fixed - Fix Safari devtools rendering issue due to `color-mix` fallback ([#​19069](tailwindlabs/tailwindcss#19069)) - Suppress Lightning CSS warnings about `:deep`, `:slotted`, and `:global` ([#​19094](tailwindlabs/tailwindcss#19094)) - Fix resolving theme keys when starting with the name of another theme key in JS configs and plugins ([#​19097](tailwindlabs/tailwindcss#19097)) - Allow named groups in combination with `not-*`, `has-*`, and `in-*` ([#​19100](tailwindlabs/tailwindcss#19100)) - Prevent important utilities from affecting other utilities ([#​19110](tailwindlabs/tailwindcss#19110)) - Don’t index into strings with the `theme(…)` function ([#​19111](tailwindlabs/tailwindcss#19111)) - Fix parsing issue when `\t` is used in at-rules ([#​19130](tailwindlabs/tailwindcss#19130)) - Upgrade: Canonicalize utilities containing `0` values ([#​19095](tailwindlabs/tailwindcss#19095)) - Upgrade: Migrate deprecated `break-words` to `wrap-break-word` ([#​19157](tailwindlabs/tailwindcss#19157)) ##### Changed - Remove the `postinstall` script from oxide (\[[#​19149](https://github.com/tailwindlabs/tailwindcss/issues/19149)])([#​19149](https://github.com/tailwindlabs/tailwindcss/pull/19149)) ### [`v4.1.14`](https://github.com/tailwindlabs/tailwindcss/blob/HEAD/CHANGELOG.md#4114---2025-10-01) [Compare Source](tailwindlabs/tailwindcss@v4.1.13...v4.1.14) ##### Fixed - Handle `'` syntax in ClojureScript when extracting classes ([#​18888](tailwindlabs/tailwindcss#18888)) - Handle `@variant` inside `@custom-variant` ([#​18885](tailwindlabs/tailwindcss#18885)) - Merge suggestions when using `@utility` ([#​18900](tailwindlabs/tailwindcss#18900)) - Ensure that file system watchers created when using the CLI are always cleaned up ([#​18905](tailwindlabs/tailwindcss#18905)) - Do not generate `grid-column` utilities when configuring `grid-column-start` or `grid-column-end` ([#​18907](tailwindlabs/tailwindcss#18907)) - Do not generate `grid-row` utilities when configuring `grid-row-start` or `grid-row-end` ([#​18907](tailwindlabs/tailwindcss#18907)) - Prevent duplicate CSS when overwriting a static utility with a theme key ([#​18056](tailwindlabs/tailwindcss#18056)) - Show Lightning CSS warnings (if any) when optimizing/minifying ([#​18918](tailwindlabs/tailwindcss#18918)) - Use `default` export condition for `@tailwindcss/vite` ([#​18948](tailwindlabs/tailwindcss#18948)) - Re-throw errors from PostCSS nodes ([#​18373](tailwindlabs/tailwindcss#18373)) - Detect classes in markdown inline directives ([#​18967](tailwindlabs/tailwindcss#18967)) - Ensure files with only `@theme` produce no output when built ([#​18979](tailwindlabs/tailwindcss#18979)) - Support Maud templates when extracting classes ([#​18988](tailwindlabs/tailwindcss#18988)) - Upgrade: Do not migrate `variant = 'outline'` during upgrades ([#​18922](tailwindlabs/tailwindcss#18922)) - Upgrade: Show version mismatch (if any) when running upgrade tool ([#​19028](tailwindlabs/tailwindcss#19028)) - Upgrade: Ensure first class inside `className` is migrated ([#​19031](tailwindlabs/tailwindcss#19031)) - Upgrade: Migrate classes inside `*ClassName` and `*Class` attributes ([#​19031](tailwindlabs/tailwindcss#19031)) ### [`v4.1.13`](https://github.com/tailwindlabs/tailwindcss/blob/HEAD/CHANGELOG.md#4113---2025-09-03) [Compare Source](tailwindlabs/tailwindcss@v4.1.12...v4.1.13) ##### Changed - Drop warning from browser build ([#​18731](tailwindlabs/tailwindcss#18731)) - Drop exact duplicate declarations when emitting CSS ([#​18809](tailwindlabs/tailwindcss#18809)) ##### Fixed - Don't transition `visibility` when using `transition` ([#​18795](tailwindlabs/tailwindcss#18795)) - Discard matched variants with unknown named values ([#​18799](tailwindlabs/tailwindcss#18799)) - Discard matched variants with non-string values ([#​18799](tailwindlabs/tailwindcss#18799)) - Show suggestions for known `matchVariant` values ([#​18798](tailwindlabs/tailwindcss#18798)) - Replace deprecated `clip` with `clip-path` in `sr-only` ([#​18769](tailwindlabs/tailwindcss#18769)) - Hide internal fields from completions in `matchUtilities` ([#​18820](tailwindlabs/tailwindcss#18820)) - Ignore `.vercel` folders by default (can be overridden by `@source …` rules) ([#​18855](tailwindlabs/tailwindcss#18855)) - Consider variants starting with `@-` to be invalid (e.g. `@-2xl:flex`) ([#​18869](tailwindlabs/tailwindcss#18869)) - Do not allow custom variants to start or end with a `-` or `_` ([#​18867](tailwindlabs/tailwindcss#18867), [#​18872](tailwindlabs/tailwindcss#18872)) - Upgrade: Migrate `aria` theme keys to `@custom-variant` ([#​18815](tailwindlabs/tailwindcss#18815)) - Upgrade: Migrate `data` theme keys to `@custom-variant` ([#​18816](tailwindlabs/tailwindcss#18816)) - Upgrade: Migrate `supports` theme keys to `@custom-variant` ([#​18817](tailwindlabs/tailwindcss#18817)) </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0MS4xNDguNCIsInVwZGF0ZWRJblZlciI6IjQyLjAuMyIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==--> Reviewed-on: https://git.in.csmpro.ru/csmpro/csm-mapban/pulls/28 Co-authored-by: Renovate Bot <renovate@csmpro.ru> Co-committed-by: Renovate Bot <renovate@csmpro.ru>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Add this suggestion to a batch that can be applied as a single commit. This suggestion is invalid because no changes were made to the code. Suggestions cannot be applied while the pull request is closed. Suggestions cannot be applied while viewing a subset of changes. Only one suggestion per line can be applied in a batch. Add this suggestion to a batch that can be applied as a single commit. Applying suggestions on deleted lines is not supported. You must change the existing code in this line in order to create a valid suggestion. Outdated suggestions cannot be applied. This suggestion has been applied or marked resolved. Suggestions cannot be applied from pending reviews. Suggestions cannot be applied on multi-line comments. Suggestions cannot be applied while the pull request is queued to merge. Suggestion cannot be applied right now. Please check back later.
This PR fixes an issue where sometimes people try to run the upgrade tool, reset the changes and then try again.
If this happens, then the
package.jsonand/or your lock file will point to the old Tailwind CSS v3 version, but the actual installed version will be v4.This will also cause the upgrade tool to now upgrade from v4 to v4, which is not what most people want if they were trying to upgrade from v3 to v4. This in turn will cause some issues because now we won't try to migrate the config file, or v3-specific classes that also exist in v4 but are only safe to upgrade from v3 to v4.
This PR uses
npm ls tailwindcssto determine the actual installed version. This command already errors if there is a mismatch between the installed version and the version inpackage.jsonor the lock file. This also happens to work in pnpm and bun projects (added integration tests for these).If for whatever reason we can't determine the expected version, we fall back to the old behavior of just upgrading. In this scenario, the changes introduced in #19026 will at least give you a hint of what version was actually installed.
Test plan
Tested it in a v3 project where I performed the following steps:
npx tailwindcss-upgrade)git reset --hard && git clean -df)This resulted in the following output:
Added some integration tests to make sure this also works in pnpm, bun and normal npm projects.
[ci-all]