Dedupe dependencies.

[wtgtybhertgeghgtwtg]

Several of the packages on which postcss-cssnext depends share dependencies (postcss, balanced-match, et cetera). However, since some of them are pinned to difference versions than others, multiple versions of these sub dependencies are downloaded. For [email protected], it looks like four versions of color, three versions of balanced-match, and two versions of each supports-color, postcss-selector-parser, color-string, color-name, and color-convert are required. I am not sure if it is an actionable issue, but could something be done so that these can be deduped?

[MoOx]

I guess one thing to do is to contribute to each dependencies.

[wtgtybhertgeghgtwtg]

I compiled a list of packages to be updated to dedupe the dependencies.

• Bump color in postcss-color-rebeccapurple. PR filed.
• Bump color in postcss-color-gray. This is already done, but they have yet to publish the patch to NPM.
• Bump color in postcss-color-hwb. PR filed.
• Bump balanced-match in postcss-selector-not. PR filed.
• Bump balanced-match in postcss-custom-properties. PR filed.
• Bump supports-color in chalk. This is already done, but they have yet to publish the patch to NPM.
• Bump postcss-selector-parser in postcss-pseudo-class-any-link.

I will see if they accept PR's for these.

[MoOx]

I am the author of most packages so there won't be any problem for most ;)

[MoOx]

I merged the PR you made including this one MoOx/reduce-function-call#5.
I checked some boxes in your previous comment :)

chalk updates for supports-color has landed a while ago. it seems to be in 1.1.2.

[wtgtybhertgeghgtwtg]

I don't know how I missed that chalk thing.
PR's filed for postcss-selector-not and postcss-custom-properties.

[wtgtybhertgeghgtwtg]

The latest version ofpostcss-pseudo-class-any-link uses the latest version of postcss-selector-parser, but the minimum supported node version is too high to use.
Not strictly part of this issue, but Nyalab/caniuse-api#54 would also help reduce dependencies.

[MoOx]

@wtgtybhertgeghgtwtg any update on the work done here?

[wtgtybhertgeghgtwtg]

More duplicates have sprung up. I will compile a list shortly.

[MoOx]

Ouch. Anything to share on how to catch these?

[wtgtybhertgeghgtwtg]

There's a visualization tool: http://npm.anvaka.com/#/view/2d/postcss-cssnext
The duplicates are supports-color, balanced-match, ansi-styles, has-flag, chalk, postcss, browserslist, color, color-string, and reduce-css-calc.
I think the best way to get some of this out of the way would be to get the packages that still use postcss@5 up to postcss@6. That would be postcss-color-rgba-fallback, postcss-pseudoelements, and pixrem.

[MoOx]

#401 might help... My bad on this...

[MoOx]

postcss-cssnext has been deprecated in favor of postcss-preset-env. Read more at https://moox.io/blog/deprecating-cssnext/