Comments (71)
It's a bit rude to link to that. While true, no reason to have to come off as a jerk about saying no.
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So the new "files" will hold all source files, and "main" will hold compiled versions again?
If so, I'd vote for proposal 1, it's simple enough.
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With proposal 2 I think you have the potential to accept valid MIME types as the category list. By doing this, it's not up to you to figure out what kinds of files people need and you offload that to a different organization where it is getting close monitoring. Personally, I prefer proposal 2 as I feel there is more clarity which would be useful to users who are new or inexperienced with a project.
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Does this mean that the dist/movement.css
used in the example of the current spec can be in main
? Because if that's the case, nothing really changes. Except the hard-exclude of movement.css
is out of the way.
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@alber70g It doesn't read that way to me — this would put them in a separate files
block. main
would retain source files only is my understanding of the OP's post.
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So we can expect half a year of wiredep not working and dependency mayhem... Nice.
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files
is an array of all the files required to use the package. Filepaths may include globs.
files
differs frommain
in thatmain
only lists single files per filetype, whereas files should include every file.We recommend listing source files in
files
, rather than compiled distribution files.
The second line implies that we should keep only ONE file per filetype in main
The last line implies that we should put into files
what is now in main
in a sense that .less
(or scss
) is not allowed to be in main
(which is the case, by looking at the current spec).
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Who is files
meant to be consumed by? Any sufficiently advanced packer should be able to parse the assets listed in main
and resolve all other dependencies (scripts, styles, images, fonts, etc.).
The problem is that naive dependency resolvers like wiredep
don't have much file specific knowledge, they just want to resolve paths and group assets by extension. Depending on the file extension, they are injected into html
or returned in an object (organized by extension/dependency) for further tools to consume.
There are several kinds of information I would find useful from a package (property names aren't important here):
main
: entry points for various file types that can be directly referenced from a browser. Not all file types support imports (e.g. ES5) and therefore concat + minification may be desirable for some.metadata
: e.g..d.ts
or.less
files with typing or variable information, but that compile down to nothing. Useful when doing development.sources
: a list of source entry point files in the component that are needed for compilation (if no sources use imports/exports, then all source files should be listed). Don't list intermediate representations (e.g.ts
->js
->min.js
, thejs
files should not be listed).assets
: a list of static assets that are referenced by various other files (e.g. fonts, images, etc.) that should be copied into production so that unneeded files (sources
,metadata
) can be filtered out.
It may also be useful to offer different collections of files in the package that can be combined together with main as needed by the consumer (think various sizes, legacy support, languages):
{
"main": [
"js/motion-base.js"
],
"options": {
"lite": [
"js/motion-lite.js"
],
"full": [
"js/motion-full.js"
],
"huge": [
"js/motion-huge.js"
],
"legacy": [
"js/motion-legacy.js"
]
}
}
There would likely need to be some way for the consumer to specify which option(s) they want to be combined with main
.
I think this gives enough information for a consumer to take the bower.json
and pipe the various file lists into their tools of choice.
metadata
is used by the consumer to build their own projects/do developmentsources
can go to a compiler (and thenmain
should be ignored as you don't want to include stuff twice)main
+options
are injected as paths intohtml
(or whatever you want to do with file paths)assets
are retained when shipping to production so all unneccessary files can be stripped out (I already minified all js and therefore don't need to ship it)
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- Re: Proposal 1:
files
flat list:- Couldn't tools just do
ls -R .
and then subtract out theignore
entries and get the same result? If yes, I don't see the point; Bower or the tools could just generate the list programmatically at runtime instead.
- Couldn't tools just do
- Re: Proposal 2: asset-type object:
- Better, but I think it would be good to tie precompiled CSS to the preprocessor file that it originated from, which this proposal doesn't do.
- Example/strawman:
"files": {
"styles": {
"dist/css/bootstrap.css": "less/bootstrap.less",
"dist/css/bootstrap-theme.css": "less/theme.less"
}
}
Other issues:
- What about
bootstrap.min.css.map
?- Can we assume the
<foo>.map
naming convention and not explicitly list these and just have tools check for them?
- Can we assume the
- What about
bootstrap.min.css
andbootstrap.min.js
?- Can we similarly assume the
<foo>.min.<bar>
naming convention?
- Can we similarly assume the
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I think proposal 1 is better, build tools will easily adopt it I believe
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Proposal one works for wiredep 👍 I wouldn't vote for globs, however. It would just slow things down and the publisher should be able to explicitly list what files are important per release. They've been doing it with main
already anyway.
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+1 for Option 1 files
, that is compatible with both wiredep and NPM specification...
Mime-types of Option 2 can be easily extracted automatically..
I'd go without globs, but with special behavior of npm:
The "files" field is an array of files to include in your project. If you name a folder in the array, then it will also include the files inside that folder. (Unless they would be ignored by another rule.)
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@sheerun What becomes the purpose/use of ignore
then?
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@cvrebert It would be the same as .npmignore
, but without separate file:
You can also provide a ".npmignore" file in the root of your package, which will keep files from being included, even if they would be picked up by the
files
array. The ".npmignore" file works just like a ".gitignore".
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@sheerun Alrighty.
@paulmillr Does Brunch have any thoughts about the proposals?
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I'm fine with globs.
However... we should note what problems we want to solve here... and which not.
- What is with minified/optimized code/assets?
- What is with "dynamic" code/assets as seen in https://github.com/angular/bower-angular-i18n where we only need one locale-specific file?
- What is our solution to different builds (compatible-modes for older browsers, etc.)? A current problem for RxJS Reactive-Extensions/RxJS#724.
- What is with source maps?
Do we answer these questions here or in a different place? I would like to solve real problems here.
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By the way, while we're at it, why don't we choose a more descriptive name, such as "sourceFiles" or "source".
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I've just read why you want files
introduced..
I think Bower made mistake by encouraging to include only source files in main
. Maybe we should roll-back a little and accept this pull-request: https://github.com/bower/bower.json-spec/pull/46/files
That said, I think files
is good idea anyway, as a more explicit way of listing all files to include in package (not main entry-points, that's what main
is for). It can be useful for packages without main files, like CSS libraries.
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+1 for @sheerun, please do!
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Would this exclude Less files from "main"
? I don't know if I like that :/
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@donaldpipowitch No, less can be library entry-point as well. If you use less
, you probably would be more interested in consuming .less
main files. If you use sass, you would be interested in consuming .sass
or .scss
. If you use plain html, you want to use .css
main files. Bower for better of worse tries to be language-agnostic..
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Okay, thanks. I asked because of this line in the pull request:
"This means that the files can be used without compiling for use by the consuming party."
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Technically .less
and .scss
files don't need compilation to be consumed by less
, sass
tools... But maybe it needs clarification.
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@sheerun @donaldpipowitch I've updated my pull request to give more clarification about 'high level' sources (less, sass, ts etc): alber70g@a93cd95
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@alber70g Now it's better, but you probably linked wrong commit. This is correct:
https://github.com/bower/bower.json-spec/pull/46/files
Note that images / fonts are not entry-points because you can't just "use them by default". They always need to be included from another resource (HTML / CSS). That's why they should be listed only in files
(my opinion).
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Thank you all. That's better!
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@sheerun Yea, I linked the commit instead of the pull request
Well, you can reference fonts as library. For example if you are building a new 'bootstrap' and you want to include 3rd party fonts, they can be part of wiredep when you inject them into your less
For example:
newBootstrap.less
/*inject:fonts*/
/*endinject*/
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@cvrebert I don't like idea of including minified files in.
Brunch minifies the result. Non-minified ver is useful for debugging.
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Thanks for all the input.
I'm not keen on rolling-back main
. I see a functional difference between main
and files
:
main
is for entry-point files. Useful for RequireJS, LESS, Sass, and tools that read file source to pull in additional dependencies.files
is for build tools that do not read file sources, like Wiredep, and need to know all the files that should be included.
Build tools should build from source files.
I see this as the root dilemma, as exhibited by the Bootstrap/Wiredep issue. Bootstrap's source styles are in .less
files. Build tools should build from those .less
files. Packages should avoid pointing to compiled files — i.e. Bootstrap's dist
.css
file. Wiredep in fact does work with .less
files. A LESS compiler can be added to the build workflow, either by Wiredep, or on the users build process' side.
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.less
files are a relatively simple transformation and a quick compilation step. What about languages like TypeScript that are more expensive to compile? If a component author wants to write their component in TypeScript, should all downstream users be required to setup the TypeScript compiler in order to use the component, even though they only care about the javascript?
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I don't know if it is practical, but maybe we need two bower modules then. One exposing the TypeScript and one exposing the JavaScript...? Or it should just add the .d.ts and .js, but never .ts.
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If this field, files
, has the same behaviour as npm
, all minified files should also be included.
It is a inverse of a potential ".bowerignore" file. Anything that's not in this list should be excluded when publishing.
wiredep
would not know if a file is minified or not.
Tools shouldn't use this field as files
just means all files that are dumped to the registry.
For the main field, I don't think the current spec justifies the definition of a "main" entry. Usually user would expect the main would be able to consumed by the end-user directly. However now we put coffee
or sass
in this fields so the user cannot use them before they compile them. Think of npm
, would you put coffee
in the main entry? You only put the compiled js
in the field.
I don't think neither these fields are supposed to be used by build tools. A field with more comprehensive information should be defined.
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Well you could put a .coffee
file into the package.json
. We did something similar for a short time with .es6
files for non-public modules so we don't needed to use Babel for every release in every module while we were in a prototyping phase.
We currently use "main"
in Bower very heavily for Less files.
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I have a thought. We can defined a dist
field, just like the directory name. Simple and easy to understand.
Under the dist
field, we can defined each file purpose.
for example:
wiredep install -s index.html -dist product
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@desandro main
is for entry-points of different file formats. Compiled files are another file format so who not put them in main
.. If someone has less compiler he can consume main entry of .less format. If someone doesn't want to use it, she/he can consume pre-compiled .css file. I think "source files" requirement can be superfluous, and the only thing that matters is "one file per format".
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I think we should make things simpler. keep main
and files
exactly the same as npm
(@donaldpipowitch I'm not sure about putting a coffee
file into package.json though). adding another field just for defining different types so that tools can better pick up.
Think about this, npm
is supporting browser side as well (either with browserify or not), they are not gonna make main
an array of files even if they decide to support client side even better. They don't worry about other file types such as css that much. So on top of that we could add another field just for this purpose.
Benefits are:
- It won't confuse the
npm
users. - Ideas or concepts between package managers are similar.
Once bower matures they will probably learn from bower.
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Or we make it completely different and look into this discussion again: bower/bower#1520. npm is fine with hijacking it and just add custom bower fields. If we try to align more with npm (which is good), we could just build Bower on top of npm and add frontend related fields (to import Less files or whatever).
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@sheerun Okay, I see your point. Listing both a .less
file and .css
that have the same functionality file wouldn't be such a bad thing as build tools can use one or the other. I still worry that we're leading build tools to build with files with duplicate functionality, sounds like that's just me :P
@stevemao #47 (comment) files is not just the anti-ignore. For example, the package (like Packery) may include multiple .js
files and a single compiled dist .js
. I include both in the bower package because they're both useful in different ways. But I only include one set or the other in files
.
@stevemao #47 (comment) Yeah, I'd like to think Bower is the (one of the) first package managers to address this issue. Front-end is messy because of wide variety of tools.
Sounds like things are coalescing. Here's a revised shot at the spec:
files
is an array of all the files required to use the package.
files
differs from main in thatmain
only lists single files per filetype, whereasfiles
should include every file.Adding a folder will include every file in that folder.
"files": [
"js/motion.js",
"js/run.js",
"js/walk.js",
"sass/motion.scss",
"sass/run.scss",
"sass/walk.scss",
"dist/movement.css",
"img/motion.png",
"img/walk.png",
"img/run.png",
"fonts/icons.woff2",
"fonts/icons.woff"
]
With this example (using the files listed in the main
example), both the .scss
files are and the dist .css
file are listed. The dist .js
file is not listed as it would be duplicated by the other .js
files.
dist
files concern me because they may include source code from other packages. That's how all my packages work at least. If they contain only source code from that package, they're good, i.e. Bootstrap. But once extra-package source code gets in dist
file, it could lead to duplicated code.
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This sounds reasonable, but I think it should be made very clear in the documentation that files
should not include multiple files of the same type that would result in code duplication.
How should dist
files be handled by bower? Will there be another property for them, or should they be documented and referenced directly by consumers?
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I think the reason here we can't agree on certain things is we are trying to solve too many things at once (by changing the things that are already good and stable enough). We also mix up the ideas with other package managers.
@donaldpipowitch bower in fundamentally different than npm no matter what you do. I see two things about the it:
- npm does WELL with
files
andmain
entry. There is absolutely no confusion about them. Since they made it very well we could just borrow the idea (especially now that the bower core team members can't agree on things). It's not wrong to learn and align with something good. - npm does NOT do well with other file types. This could be addressed by another field (In my early comments).
@desandro I think your idea is very clear and makes sense but I wouldn't modify the existing fields that are proven (by other package managers maybe, but doesn't matter) to be good. Again I would put these in a new field.
I still worry that we're leading build tools to build with files with duplicate functionality
This is exactly why I think listing both js
and coffee
files in main
isn't ideal and I can't see your proposed files
field can fundamentally solve it.
I think there is nothing wrong to keep main
and files
the same as npm. We should instead address the problem with npm (and other package managers) by not modifying main
, files
or other fields that are already good enough. Introduce something new instead. This also makes each entry fields duty very atomic.
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bower in fundamentally different than npm no matter what you do.
- npm does NOT do well with other file types. This could be addressed by another field (In my early comments).
Looks like they don't differ that much and we're allowed to add new fields to package.json
. :)
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I don't think bower should breaks it previous rules.
main is good enough, file and main are duplicated.
for entry point for some application, maybe you can change the structure from
main : [ 'file1']
to
main : [ {name: 'file1', entry: true}]
which is not only that rules will be consitent with previous bower version but also new adjustment can be adopted for further use.
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I don't think bower should breaks it previous rules.
@calidion The whole problem is that its previous rules were so vague that it wasn't clear what the boundary was between correct and incorrect.
Is main.sass
"required"? For Sass users, obviously yes. For other users, no.
Is dist.css
"required"? For Sass users, obviously no. For other users, yes.
Thus, these two files were simultaneously absolutely required and completely optional, depending on your interpretation, making the correct value of main
clear as mud.
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@cvrebert
thanks for the explanation.
I think user defined configuration may play the main role.
if the users choose to use sass
, they may define their configure in bower.conf
files: 'sass'
default styling would be 'default' or none.
then in new introduced files field, we introduce two configuration versions of files.
- simple version:
"files": [
"js/motion.js",
"js/run.js",
"js/walk.js",
"sass/motion.scss",
"sass/run.scss",
"sass/walk.scss",
"img/motion.png",
"img/walk.png",
"img/run.png",
"fonts/icons.woff2",
"fonts/icons.woff"
]
- complicated version.
"files": {
'default': //mostly for js, css only, no sass or less
[
"js/motion.js",
"js/run.js",
"js/walk.js",
"sass/motion.scss",
"sass/run.scss",
"sass/walk.scss",
"img/motion.png",
"img/walk.png",
"img/run.png",
"fonts/icons.woff2",
"fonts/icons.woff"
],
'sass': [],
'less': [],
...
}
which will meet all possible needs for different uses and different configurations.
if the bower.conf is files: 'sass'
,
then the sass
of the files
will be choose by wiredep or some other tools.
Thought, I would like bower.json to keep main entry rules from previous version until time is ready to remove other files.
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@calidion Your "complicated version" is basically #21.
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a little different is that it will include all kind types of files.
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files
should just be anti-ignore. A "complicated" field should be defined for different consumers.
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@stevemao Would files
be optional for those of us who already set a proper ignore
value? As a package maintainer, I see no point in semi-manually maintaining a field that bower/wiredep could so extremely easily compute itself using ls -R
.
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@desandro While this is still being hashed out, is it worth considering reverting the spec change? I'm happy to tag wiredep along with wherever the Bower boat steers us, but for the sake of the users, it would be great to allow main
to live on as it has been interpreted by the community thus far, and consider other metadata options for the gaps.
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What a mess. Got here from a build failure scratching my head. The de-facto meaning of main has been betrayed! Nooo! Now to wait for other build packages to catch up or patch things with custom main
and then wait for the eventual breakage again when those tools use the new files
field. Sigh.
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@calidion maybe a good idea to respect people and their ideas rather than posting what you just did.
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@calidion You're way off-base. None of that gives you a right to treat people like dirt. Seeing as an apology is unlikely forthcoming, I'm going to mute this issue.
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@benschwarz I apology for what i have said, but I hope as a base system, considering more on every changes you made, and what would be the subsequences for client projects.
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Just thought https://atom.io/docs/v1.0.3/hacking-atom-package-word-count#package-json might inspire you guys :)
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+1 for files with flat list
As an aside - the changes to main also break this grunt task - https://github.com/yatskevich/grunt-bower-task - I think "files" is actually what this copy functionality needs rather than main.
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After letting things cool off for a while... 🐧 I think ditching this proposal and reverting main
back to including all files may be the way to go. This is already the common place practice. This will get Wiredep support back on track. As @notbrain points out, advocating for adopting a new field will likely have its own difficulties.
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As for me I'm convinced that listing only one file per extension in main
, and extracting all the needed dependencies from them (using e.g. webpack) is the way to go. Listing needed files manually is too error prone and doesn't capture e.g. dependencies between assets..
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Technologies are like products, when they fit for demands, they will grow, otherwise, they will die.
compatibility is the key to success for technologies, Anyone who breaks it will be published.
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But breaking compatability is how new standards and best practices are made. To only look at the short term is short sightsighted and misses the big picture goals
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@kkirsche but what this boils down to is a naming convention preference. The main
files list can be used as the de-facto standard for compiled/assets (as @stephenplusplus points out) and a new list files
or whatever it will be called can be used to list all core source files. I'd call it sources
or rawsrc
or something since main
still makes more sense as a list of files that allow me to use a package as a library, not as a main entry point to files that need further processing. We shouldn't need to process main
files, especially if up until this change we didn't need to.
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@desandro Whilst it might be simple for bower to take this approach, those who utilise bower will have to deal with the breaking change in specification. It doesn't just affect the direct consumers of bower, but those who use components which use bower (think grunt/gulp tasks). This is mostly a pain because there's no good mechanism for communicating the new specification to all consumers.
For me, Bower is a tool which allows devs to get on with the work that really matters to them... If any tool takes more effort to maintain than the primary goal, people just stop using the tool. This will be a real pain for CI builds.
It took a long time to settle on a specification. Personally I feel it would be unwise to change it now rather than extend it as originally proposed in this post.
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Is there a reason to not just revert this change and re-release this version then do a major version bump to forcefully deprecate the old spec while moving to a new version with a new spec? I can only understand the frustration when there isn't a major version change. With one, sorry but breaking changes are the entire reason for major version numbers.
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Is there a reason to not just revert this change and re-release this version
Just to clear something up: we already changed main
#43 this change would be add a new field files
As for me I'm convinced that listing only one file per extension in main, and extracting all the needed dependencies from them (using e.g. webpack) is the way to go. Listing needed files manually is too error prone and doesn't capture e.g. dependencies between assets.
Thanks for this confirmation. Current main
spec follows this.
Now I'm flip-flopping on my previous comment. "main
listing one-per-type" is a good change. It does break backwards compatibility with some tools like Wiredep. However, by adding a new field, these tools can maintain compatibility with packages that use main
the old way. A fix would look like checking for files
before using main
.
// use files field if there, otherwise fall back to main field
var files = manifestJson.files || manifestJson.main
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I was looking up to see if bower contained something similar to npm's file list to simplify my module (I'd rather be explicit with what I want included versus maintaining an ever growing list of ignores) which ended with my stumbling across this thread. This issue has been open since June and adding a files property would bring yet another thing of bower's to parity with npm; why wasn't that simply done and merged in? This is just a huge issue of arguments over using main
or source
or sourceFiles
or min vs full vs other assets.
Just make a file list that includes everything that should be downloaded by bower. When a developer wants to use one file versus another, in their deployment scripts they can decide what is or isn't taken and that's it. That's how most other package managers do it and it's easy. The simpler the better.
Besides the more parity with how npm works the easier bower/bower#1520 is to close (in one direction or another).
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npm's files
is something different than proposed here (it's simply an inverse of ignore
)
We could include it as well, but I don't like attaching it the meaning of "of all the files required to use the package". I especially don't like the idea of build tools using this list to select files to auto-require in project.
If we introduce files
as just inverse of ignore
, I'm perfectly fine with that.
If wiredep wants to interpret this list as all files to include in project, I cannot stop them from doing so, but I think it's a wrong approach. It's better to extract dependencies with tools like webpack.
How files
would be implemented in bower? Any files not listed in files
would be removed after downloading project. It means files
needs to list even optional dependencies. Just like npm does it.
Additionally we'll make it clear files
don't specify the order to load these files (some people assume main
does it...). files
will be non-ordered list files to include in the package. It can include globs.
Are you OK with it?
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attaching it the meaning of "of all the files required to use the package"
But that's not what it means in the npm world; those are simply the files bundled with an npm install and nothing more. Yes some are required but not all. You typically pull down more files than what is required (documentation, sometimes examples, etc).
If we introduce files as just inverse of ignore, I'm perfectly fine with that.
👍 ship it :). I'd work on the merge request but I'm unlikely to have time for a few more weeks (though if no one does it I'll certainly just do it).
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+1 for Proposal 2
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@desandro after a year and a half has anything happened to this?
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The reason I ask is I ended up in in a 20+ page rabbit hole to find this page with multiple different projects relying on each other's issues. I wouldn't have asked otherwise.
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@OmgImAlexis A year later, I'd say the recommended approach for developers is to use webpack to automatically discover assets that really need to be bundled. If you're package author, you can still use ignore
field of bower.json to exclude unnecessary files.
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Related Issues (20)
- bower validate? HOT 1
- Should `main` contain individual JS files or one concatenated JS file? HOT 4
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- How should local components be specified and consumed to avoid duplication? HOT 1
- Version the spec itself HOT 5
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