Commit graph

50 commits

Author SHA1 Message Date
Bjørn Erik Pedersen
29ccb36069 Fix /static performance regression from Hugo 0.103.0
In `v0.103.0` we added support for `resources.PostProcess` for all file types, not just HTML. We had benchmarks that said we were fine in that department, but those did not consider the static file syncing.

This fixes that by:

* Making sure that the /static syncer always gets its own file system without any checks for the post process token.
* For dynamic files (e.g. rendered HTML files) we add an additional check to make sure that we skip binary files (e.g. images)

Fixes #10328
2022-09-26 19:02:25 +02:00
satotake
6f7fbe03b1 basefs: add noBuildLock flag
If the flag is enabled, `.hugo_build.lock` will not be created.
This ensures safe running on read-only filesystem etc.
Close #9780
2022-05-24 13:57:23 +02:00
Bjørn Erik Pedersen
f2946da9e8 Improve error messages, esp. when the server is running
* Add file context to minifier errors when publishing
* Misc fixes (see issues)
* Allow custom server error template in layouts/server/error.html

To get to this, this commit also cleans up and simplifies the code surrounding errors and files. This also removes the usage of `github.com/pkg/errors`, mostly because of https://github.com/pkg/errors/issues/223 -- but also because most of this is now built-in to Go.

Fixes #9852
Fixes #9857
Fixes #9863
2022-05-06 19:43:22 +02:00
Bjørn Erik Pedersen
30c2e54c25 Replace all usage of CopyOnWriteFs with OverlayFs
Fixes #9761
2022-04-10 13:49:31 +02:00
Bjørn Erik Pedersen
d070bdf10f
Rework the Destination filesystem to make --renderStaticToDisk work
See #9626
2022-04-08 13:26:17 +02:00
Bjørn Erik Pedersen
0a56f2af4e
Revert "Revert "Allow rendering static files to disk and dynamic to memory in server mode""
This reverts commit 64b7b7a897.
2022-04-08 13:26:16 +02:00
Bjørn Erik Pedersen
1c0e7c1ae1 Make sure file mounts higher up wins
Fixes #9693
2022-03-20 20:23:03 +01:00
Bjørn Erik Pedersen
64b7b7a897 Revert "Allow rendering static files to disk and dynamic to memory in server mode"
This reverts commit 7d8011ed63.

Updates #9647
2022-03-11 13:10:47 +01:00
SatowTakeshi
7d8011ed63 Allow rendering static files to disk and dynamic to memory in server mode
Updates #9625
2022-03-08 19:27:54 +01:00
Bjørn Erik Pedersen
0e0d672bcb Remove the decorator from the fs used in ReadDir
There have been a site breakage reported in the wild after 0.93.1. With this commit we shoudl be back to how it behaved in 0.92.2.

Closes #9609
2022-03-08 09:51:59 +01:00
Bjørn Erik Pedersen
673cde1eb1 tpl/os: Revert readDir in theme behaviour
Fixes #9599
2022-03-04 08:43:47 +01:00
Bjørn Erik Pedersen
aee9e11a40 Make sure we always create the /public folder
* Before this commit, when you had static files in the root of /content and no /public folder, that folder would not be created unless the /static syncer had already run.
* So, with a common pattern doing `rm -rf public && hugo` would the fail now and then because /static and /content are processed in parallel (unless you have cleanDestinationDir=true)
* This was even worse before commit 0b918e131f – a frozen build.

Closes #8166
2021-12-23 15:09:27 +01:00
Bjørn Erik Pedersen
2e70f61fb0 Fix content dir resolution when main project is a Hugo Module
Fixes #9177
2021-11-16 20:42:34 +01:00
Bjørn Erik Pedersen
b8155452ac Improve error when we cannot determine content directory in "hugo new"
See #9166
2021-11-15 11:21:39 +01:00
Bjørn Erik Pedersen
2b01c85d14 Fix path resolution in hugo new
With theme and project with content directories and command on the form `hugo new posts/test.md`.

Fixes #9129
2021-11-08 14:10:46 +01:00
Bjørn Erik Pedersen
471ed91c60 hugofs: Add includeFiles and excludeFiles to mount configuration
Fixes #9042
2021-10-20 05:00:17 +02:00
Bjørn Erik Pedersen
ba35e69856 Add a cross process build lock and use it in the archetype content builder
Fixes #9048
2021-10-18 12:13:13 +02:00
Bjørn Erik Pedersen
9185e11eff Reimplement archetypes
The old implementation had some issues, mostly related to the context (e.g. name, file paths) passed to the template.

This new implementation is using the exact same code path for evaluating the pages as in a regular build.

This also makes it more robust and easier to reason about in a multilingual setup.

Now, if you are explicit about the target path, Hugo will now always pick the correct mount and language:

```bash
hugo new content/en/posts/my-first-post.md
```

Fixes #9032
Fixes #7589
Fixes #9043
Fixes #9046
Fixes #9047
2021-10-16 15:22:03 +02:00
Bjørn Erik Pedersen
022c479551
hugofs: Make FileMeta a struct
This commit started out investigating a `concurrent map read write` issue, ending by replacing the map with a struct.

This is easier to reason about, and it's more effective:

```
name                                  old time/op    new time/op    delta
SiteNew/Regular_Deep_content_tree-16    71.5ms ± 3%    69.4ms ± 5%    ~     (p=0.200 n=4+4)

name                                  old alloc/op   new alloc/op   delta
SiteNew/Regular_Deep_content_tree-16    29.7MB ± 0%    27.9MB ± 0%  -5.82%  (p=0.029 n=4+4)

name                                  old allocs/op  new allocs/op  delta
SiteNew/Regular_Deep_content_tree-16      313k ± 0%      303k ± 0%  -3.35%  (p=0.029 n=4+4)
```

See #8749
2021-07-15 17:14:26 +02:00
Bjørn Erik Pedersen
d90e37e0c6 all: Format code with gofumpt
See https://github.com/mvdan/gofumpt
2020-12-03 13:12:58 +01:00
Bjørn Erik Pedersen
78f227b664
js: Let ESBuild handle all imports from node_modules
This commit fixes some issues where modules in /assets share the same name as in node_modules.

This was not intended, and with this commit the node_modules-components should be isolated. If you want to redefine something inside node_modules, use the `defines` option.

Fixes #7948
2020-11-13 08:54:29 +01:00
Bjørn Erik Pedersen
fdfa4a5fe6 Allow getJSON errors to be ignored
This change is mostly motivated to get a more stable CI build (we're building the Hugo site there, with Instagram and Twitter shortcodes sometimes failing).

Fixes #7866
2020-10-22 09:09:29 +02:00
Bjørn Erik Pedersen
85ba9bfffb Add "hugo mod npm pack"
This commit also introduces a convention where these common JS config files, including `package.hugo.json`, gets mounted into:

```
assets/_jsconfig
´``

These files mapped to their real filename will be added to the environment when running PostCSS, Babel etc., so you can do `process.env.HUGO_FILE_TAILWIND_CONFIG_JS` to resolve the real filename.

But do note that `assets` is a composite/union filesystem, so if your config file is not meant to be overridden, name them something specific.

This commit also adds adds `workDir/node_modules` to `NODE_PATH` and `HUGO_WORKDIR` to the env when running the JS tools above.

Fixes #7644
Fixes #7656
Fixes #7675
2020-09-13 20:55:29 +02:00
Bjørn Erik Pedersen
2f721f8ec6
Add basic "post resource publish support"
Fixes #7146
2020-04-07 21:59:20 +02:00
Bjørn Erik Pedersen
eada236f87
Introduce a tree map for all content
This commit introduces a new data structure to store pages and their resources.

This data structure is backed by radix trees.

This simplies tree operations, makes all pages a bundle,  and paves the way for #6310.

It also solves a set of annoying issues (see list below).

Not a motivation behind this, but this commit also makes Hugo in general a little bit faster and more memory effective (see benchmarks). Especially for partial rebuilds on content edits, but also when taxonomies is in use.

```
name                                   old time/op    new time/op    delta
SiteNew/Bundle_with_image/Edit-16        1.32ms ± 8%    1.00ms ± 9%  -24.42%  (p=0.029 n=4+4)
SiteNew/Bundle_with_JSON_file/Edit-16    1.28ms ± 0%    0.94ms ± 0%  -26.26%  (p=0.029 n=4+4)
SiteNew/Tags_and_categories/Edit-16      33.9ms ± 2%    21.8ms ± 1%  -35.67%  (p=0.029 n=4+4)
SiteNew/Canonify_URLs/Edit-16            40.6ms ± 1%    37.7ms ± 3%   -7.20%  (p=0.029 n=4+4)
SiteNew/Deep_content_tree/Edit-16        56.7ms ± 0%    51.7ms ± 1%   -8.82%  (p=0.029 n=4+4)
SiteNew/Many_HTML_templates/Edit-16      19.9ms ± 2%    18.3ms ± 3%   -7.64%  (p=0.029 n=4+4)
SiteNew/Page_collections/Edit-16         37.9ms ± 4%    34.0ms ± 2%  -10.28%  (p=0.029 n=4+4)
SiteNew/Bundle_with_image-16             10.7ms ± 0%    10.6ms ± 0%   -1.15%  (p=0.029 n=4+4)
SiteNew/Bundle_with_JSON_file-16         10.8ms ± 0%    10.7ms ± 0%   -1.05%  (p=0.029 n=4+4)
SiteNew/Tags_and_categories-16           43.2ms ± 1%    39.6ms ± 1%   -8.35%  (p=0.029 n=4+4)
SiteNew/Canonify_URLs-16                 47.6ms ± 1%    47.3ms ± 0%     ~     (p=0.057 n=4+4)
SiteNew/Deep_content_tree-16             73.0ms ± 1%    74.2ms ± 1%     ~     (p=0.114 n=4+4)
SiteNew/Many_HTML_templates-16           37.9ms ± 0%    38.1ms ± 1%     ~     (p=0.114 n=4+4)
SiteNew/Page_collections-16              53.6ms ± 1%    54.7ms ± 1%   +2.09%  (p=0.029 n=4+4)

name                                   old alloc/op   new alloc/op   delta
SiteNew/Bundle_with_image/Edit-16         486kB ± 0%     430kB ± 0%  -11.47%  (p=0.029 n=4+4)
SiteNew/Bundle_with_JSON_file/Edit-16     265kB ± 0%     209kB ± 0%  -21.06%  (p=0.029 n=4+4)
SiteNew/Tags_and_categories/Edit-16      13.6MB ± 0%     8.8MB ± 0%  -34.93%  (p=0.029 n=4+4)
SiteNew/Canonify_URLs/Edit-16            66.5MB ± 0%    63.9MB ± 0%   -3.95%  (p=0.029 n=4+4)
SiteNew/Deep_content_tree/Edit-16        28.8MB ± 0%    25.8MB ± 0%  -10.55%  (p=0.029 n=4+4)
SiteNew/Many_HTML_templates/Edit-16      6.16MB ± 0%    5.56MB ± 0%   -9.86%  (p=0.029 n=4+4)
SiteNew/Page_collections/Edit-16         16.9MB ± 0%    16.0MB ± 0%   -5.19%  (p=0.029 n=4+4)
SiteNew/Bundle_with_image-16             2.28MB ± 0%    2.29MB ± 0%   +0.35%  (p=0.029 n=4+4)
SiteNew/Bundle_with_JSON_file-16         2.07MB ± 0%    2.07MB ± 0%     ~     (p=0.114 n=4+4)
SiteNew/Tags_and_categories-16           14.3MB ± 0%    13.2MB ± 0%   -7.30%  (p=0.029 n=4+4)
SiteNew/Canonify_URLs-16                 69.1MB ± 0%    69.0MB ± 0%     ~     (p=0.343 n=4+4)
SiteNew/Deep_content_tree-16             31.3MB ± 0%    31.8MB ± 0%   +1.49%  (p=0.029 n=4+4)
SiteNew/Many_HTML_templates-16           10.8MB ± 0%    10.9MB ± 0%   +1.11%  (p=0.029 n=4+4)
SiteNew/Page_collections-16              21.4MB ± 0%    21.6MB ± 0%   +1.15%  (p=0.029 n=4+4)

name                                   old allocs/op  new allocs/op  delta
SiteNew/Bundle_with_image/Edit-16         4.74k ± 0%     3.86k ± 0%  -18.57%  (p=0.029 n=4+4)
SiteNew/Bundle_with_JSON_file/Edit-16     4.73k ± 0%     3.85k ± 0%  -18.58%  (p=0.029 n=4+4)
SiteNew/Tags_and_categories/Edit-16        301k ± 0%      198k ± 0%  -34.14%  (p=0.029 n=4+4)
SiteNew/Canonify_URLs/Edit-16              389k ± 0%      373k ± 0%   -4.07%  (p=0.029 n=4+4)
SiteNew/Deep_content_tree/Edit-16          338k ± 0%      262k ± 0%  -22.63%  (p=0.029 n=4+4)
SiteNew/Many_HTML_templates/Edit-16        102k ± 0%       88k ± 0%  -13.81%  (p=0.029 n=4+4)
SiteNew/Page_collections/Edit-16           176k ± 0%      152k ± 0%  -13.32%  (p=0.029 n=4+4)
SiteNew/Bundle_with_image-16              26.8k ± 0%     26.8k ± 0%   +0.05%  (p=0.029 n=4+4)
SiteNew/Bundle_with_JSON_file-16          26.8k ± 0%     26.8k ± 0%   +0.05%  (p=0.029 n=4+4)
SiteNew/Tags_and_categories-16             273k ± 0%      245k ± 0%  -10.36%  (p=0.029 n=4+4)
SiteNew/Canonify_URLs-16                   396k ± 0%      398k ± 0%   +0.39%  (p=0.029 n=4+4)
SiteNew/Deep_content_tree-16               317k ± 0%      325k ± 0%   +2.53%  (p=0.029 n=4+4)
SiteNew/Many_HTML_templates-16             146k ± 0%      147k ± 0%   +0.98%  (p=0.029 n=4+4)
SiteNew/Page_collections-16                210k ± 0%      215k ± 0%   +2.44%  (p=0.029 n=4+4)
```

Fixes #6312
Fixes #6087
Fixes #6738
Fixes #6412
Fixes #6743
Fixes #6875
Fixes #6034
Fixes #6902
Fixes #6173
Fixes #6590
2020-02-18 09:49:42 +01:00
Bjørn Erik Pedersen
80dd6ddde2 Fix module mount in sub folder
This addresses a specific issue, but is a also a major simplification of the filesystem file mounts.

Fixes #6730
2020-02-04 00:17:10 +01:00
Bjørn Erik Pedersen
17af79a03e Fix 0.62.1 server rebuild slowdown regression
Fixes #6784
2020-01-23 11:50:02 +01:00
Bjørn Erik Pedersen
ff6253bc7c Support files in content mounts
This commit is a general improvement of handling if single file mounts.

Fixes #6684
Fixes #6696
2020-01-01 18:19:49 +01:00
Bjørn Erik Pedersen
ad6504e6b5 Fix abs path handling in module mounts
Fixes #6622
2019-12-19 18:51:59 +01:00
Bjørn Erik Pedersen
e625088ef5
Add render template hooks for links and images
This commit also

* revises the change detection for templates used by content files in server mode.
* Adds a Page.RenderString method

Fixes #6545
Fixes #4663
Closes #6043
2019-12-18 11:44:40 +01:00
Bjørn Erik Pedersen
952a319496 Fix live reload mount logic with sub paths
Fixes #6209
2019-08-15 19:14:22 +02:00
Bjørn Erik Pedersen
166a394a2f Fix static sync issue with virtual mounts
Fixes #6165
2019-08-09 10:18:28 +02:00
Bjørn Erik Pedersen
d7c233afee commands: Add "hugo config mounts" command
This prints the effective file mounts in a project.

Fixes #6144
2019-07-31 12:10:05 +02:00
Bjørn Erik Pedersen
4b6c5eba30 Move the mount duplicate filter to the modules package
Also simplify the mount validation logic. There are plenty of ways a user can create mount configs that behaves oddly.
2019-07-31 12:10:05 +02:00
Bjørn Erik Pedersen
edf9f0a354 Allow overlap in module mounts
Fixes #6146
2019-07-31 12:10:05 +02:00
Bjørn Erik Pedersen
e5f2299741 Block symlink dir traversal for /static
This is in line with how it behaved before, but it was lifted a little for the project mount for Hugo Modules,
but that could create hard-to-detect loops.
2019-07-25 11:27:25 +02:00
Bjørn Erik Pedersen
9f5a92078a
Add Hugo Modules
This commit implements Hugo Modules.

This is a broad subject, but some keywords include:

* A new `module` configuration section where you can import almost anything. You can configure both your own file mounts nd the file mounts of the modules you import. This is the new recommended way of configuring what you earlier put in `configDir`, `staticDir` etc. And it also allows you to mount folders in non-Hugo-projects, e.g. the `SCSS` folder in the Bootstrap GitHub project.
* A module consists of a set of mounts to the standard 7 component types in Hugo: `static`, `content`, `layouts`, `data`, `assets`, `i18n`, and `archetypes`. Yes, Theme Components can now include content, which should be very useful, especially in bigger multilingual projects.
* Modules not in your local file cache will be downloaded automatically and even "hot replaced" while the server is running.
* Hugo Modules supports and encourages semver versioned modules, and uses the minimal version selection algorithm to resolve versions.
* A new set of CLI commands are provided to manage all of this: `hugo mod init`,  `hugo mod get`,  `hugo mod graph`,  `hugo mod tidy`, and  `hugo mod vendor`.

All of the above is backed by Go Modules.

Fixes #5973
Fixes #5996
Fixes #6010
Fixes #5911
Fixes #5940
Fixes #6074
Fixes #6082
Fixes #6092
2019-07-24 09:35:53 +02:00
Bjørn Erik Pedersen
b5f39d23b8 all: Apply staticcheck recommendations 2019-03-24 16:14:51 +01:00
Bjørn Erik Pedersen
f9b4eb4f39 Handle themes in the new file cache (for images, assets)
In the newly consolidated file cache implementation, we forgot that we also look in the theme(s) for assets (SCSS transformations etc.), which is not good for Netlify and the demo sites.

Fixes #5460
2018-11-23 21:09:00 +01:00
Bjørn Erik Pedersen
f7aeaa6129 Add a consolidated file cache
This commits reworks how file caching is performed in Hugo. Now there is only one way, and it can be configured.

This is the default configuration:

```toml
[caches]
[caches.getjson]
dir = ":cacheDir"
maxAge = -1
[caches.getcsv]
dir = ":cacheDir"
maxAge = -1
[caches.images]
dir = ":resourceDir/_gen"
maxAge = -1
[caches.assets]
dir = ":resourceDir/_gen"
maxAge = -1
```

You can override any of these cache setting in your own `config.toml`.

The placeholders explained:

`:cacheDir`: This is the value of the `cacheDir` config option if set (can also be set via OS env variable `HUGO_CACHEDIR`). It will fall back to `/opt/build/cache/hugo_cache/` on Netlify, or a `hugo_cache` directory below the OS temp dir for the others.
`:resourceDir`: This is the value of the `resourceDir` config option.

`maxAge` is the time in seconds before a cache entry will be evicted, -1 means forever and 0 effectively turns that particular cache off.

This means that if you run your builds on Netlify, all caches configured with `:cacheDir` will be saved and restored on the next build. For other CI vendors, please read their documentation. For an CircleCI example, see 6c3960a8f4/.circleci/config.yml

Fixes #5404
2018-11-13 14:19:42 +01:00
Bjørn Erik Pedersen
78578632f5 Fix archetype handling of directories in theme
Fixes #5318
2018-10-26 12:16:28 +02:00
Bjørn Erik Pedersen
f916814697 Prevent symbolic links from themes 2018-09-23 17:18:35 +02:00
Cameron Moore
1ed8c36336 hugolib: Remove extraneous createStaticFs call
This looks like a copy+paste error.  We have the same line a few lines
below this call and we actually handle the err value there.
2018-08-30 22:31:29 +02:00
Cameron Moore
e03eb90a36 hugolib: Fix godoc comment 2018-08-30 22:31:29 +02:00
Bjørn Erik Pedersen
166483fe12 resource/scss: Add IncludePaths config option
Takes paths relative to the current working dir.

Fixes #4921
2018-07-20 17:50:44 +02:00
Bjørn Erik Pedersen
5c9d5413a4 hugolib/filesystems: Fix theme config for Work Fs
Which was the reason why `PostCSS´ from theme(s) was not picked up.

Fixes #4951
2018-07-18 11:39:04 +02:00
Bjørn Erik Pedersen
80c8f3b81a hugolib: Fix static filesystem for themed multihost sites
Multihost is where each language has its own `baseURL`. In this configuration, static files from the theme was not picked up.

This was a regression in Hugo `0.42`. This commit also adds proper tests for this, so that does not happen again.

Fixes #4929
2018-07-12 12:18:56 +02:00
Yang Li
3cea2932e1 Fix typos 2018-07-07 12:29:56 +02:00
Bjørn Erik Pedersen
dea71670c0
Add Hugo Piper with SCSS support and much more
Before this commit, you would have to use page bundles to do image processing etc. in Hugo.

This commit adds

* A new `/assets` top-level project or theme dir (configurable via `assetDir`)
* A new template func, `resources.Get` which can be used to "get a resource" that can be further processed.

This means that you can now do this in your templates (or shortcodes):

```bash
{{ $sunset := (resources.Get "images/sunset.jpg").Fill "300x200" }}
```

This also adds a new `extended` build tag that enables powerful SCSS/SASS support with source maps. To compile this from source, you will also need a C compiler installed:

```
HUGO_BUILD_TAGS=extended mage install
```

Note that you can use output of the SCSS processing later in a non-SCSSS-enabled Hugo.

The `SCSS` processor is a _Resource transformation step_ and it can be chained with the many others in a pipeline:

```bash
{{ $css := resources.Get "styles.scss" | resources.ToCSS | resources.PostCSS | resources.Minify | resources.Fingerprint }}
<link rel="stylesheet" href="{{ $styles.RelPermalink }}" integrity="{{ $styles.Data.Digest }}" media="screen">
```

The transformation funcs above have aliases, so it can be shortened to:

```bash
{{ $css := resources.Get "styles.scss" | toCSS | postCSS | minify | fingerprint }}
<link rel="stylesheet" href="{{ $styles.RelPermalink }}" integrity="{{ $styles.Data.Digest }}" media="screen">
```

A quick tip would be to avoid the fingerprinting part, and possibly also the not-superfast `postCSS` when you're doing development, as it allows Hugo to be smarter about the rebuilding.

Documentation will follow, but have a look at the demo repo in https://github.com/bep/hugo-sass-test

New functions to create `Resource` objects:

* `resources.Get` (see above)
* `resources.FromString`: Create a Resource from a string.

New `Resource` transformation funcs:

* `resources.ToCSS`: Compile `SCSS` or `SASS` into `CSS`.
* `resources.PostCSS`: Process your CSS with PostCSS. Config file support (project or theme or passed as an option).
* `resources.Minify`: Currently supports `css`, `js`, `json`, `html`, `svg`, `xml`.
* `resources.Fingerprint`: Creates a fingerprinted version of the given Resource with Subresource Integrity..
* `resources.Concat`: Concatenates a list of Resource objects. Think of this as a poor man's bundler.
* `resources.ExecuteAsTemplate`: Parses and executes the given Resource and data context (e.g. .Site) as a Go template.

Fixes #4381
Fixes #4903
Fixes #4858
2018-07-06 11:46:12 +02:00
Bjørn Erik Pedersen
80230f26a3
Add support for theme composition and inheritance
This commit adds support for theme composition and inheritance in Hugo.

With this, it helps thinking about a theme as a set of ordered components:

```toml
theme = ["my-shortcodes", "base-theme", "hyde"]
```

The theme definition example above in `config.toml` creates a theme with the 3 components with presedence from left to right.

So, Hugo will, for any given file, data entry etc., look first in the project, and then in `my-shortcode`, `base-theme` and lastly `hyde`.

Hugo uses two different algorithms to merge the filesystems, depending on the file type:

* For `i18n` and `data` files, Hugo merges deeply using the translation id and data key inside the files.
* For `static`, `layouts` (templates) and `archetypes` files, these are merged on file level. So the left-most file will be chosen.

The name used in the `theme` definition above must match a folder in `/your-site/themes`, e.g. `/your-site/themes/my-shortcodes`. There are  plans to improve on this and get a URL scheme so this can be resolved automatically.

Also note that a component that is part of a theme can have its own configuration file, e.g. `config.toml`. There are currently some restrictions to what a theme component can configure:

* `params` (global and per language)
* `menu` (global and per language)
* `outputformats` and `mediatypes`

The same rules apply here: The left-most param/menu etc. with the same ID will win. There are some hidden and experimental namespace support in the above, which we will work to improve in the future, but theme authors are encouraged to create their own namespaces to avoid naming conflicts.

A final note: Themes/components can also have a `theme` definition in their `config.toml` and similar, which is the "inheritance" part of this commit's title. This is currently not supported by the Hugo theme site. We will have to wait for some "auto dependency" feature to be implemented for that to happen, but this can be a powerful feature if you want to create your own theme-variant based on others.

Fixes #4460
Fixes #4450
2018-06-10 23:55:20 +02:00