reStructuredText doesn't have explicit section levels but sets them in
the order of appearance. Since level 1 is already set from the title in
the front matter it makes more sense to start with level 2 when
converting with rst2html.
This commit completes the "The Revival of the Archetypes!"
If `.Site` is used in the arcetype template, the site is built and added to the template context.
Note that this may be potentially time consuming for big sites.
A more complete example would then be for the section `newsletter` and the archetype file `archetypes/newsletter.md`:
```
---
title: "{{ replace .TranslationBaseName "-" " " | title }}"
date: {{ .Date }}
tags:
- x
categories:
- x
draft: true
---
<!--more-->
{{ range first 10 ( where .Site.RegularPages "Type" "cool" ) }}
* {{ .Title }}
{{ end }}
```
And then create a new post with:
```bash
hugo new newsletter/the-latest-cool.stuff.md
```
**Hot Tip:** If you set the `newContentEditor` configuration variable to an editor on your `PATH`, the newly created article will be opened.
The above _newsletter type archetype_ illustrates the possibilities: The full Hugo `.Site` and all of Hugo's template funcs can be used in the archetype file.
Fixes#1629
Join calls Clean as it says in docs.
Minor performance improvement:
Before:
Average time per operation: 432ms
Average memory allocated per operation: 127322kB
Average allocations per operation: 2138137
After:
Average time per operation: 428ms
Average memory allocated per operation: 127350kB
Average allocations per operation: 2137892
This commit moves almost all of the template functions into separate
packages under tpl/ and adds a namespace framework. All changes should
be backward compatible for end users, as all existing function names in
the template funcMap are left intact.
Seq and DoArithmatic have been moved out of the helpers package and into
template namespaces.
Most of the tests involved have been refactored, and many new tests have
been written. There's still work to do, but this is a big improvement.
I got a little overzealous and added some new functions along the way:
- strings.Contains
- strings.ContainsAny
- strings.HasSuffix
- strings.TrimPrefix
- strings.TrimSuffix
Documentation is forthcoming.
Fixes#3042
This commit adds a work flow aroung GoReleaser to get the Hugo release process automated and more uniform:
* It can be run fully automated or in two steps to allow for manual edits of the relase notes.
* It supports both patch and full releases.
* It fetches author, issue, repo info. etc. for the release notes from GitHub.
* The file names produced are mainly the same as before, but we no use tar.gz as archive for all Unix versions.
* There isn't a fully automated CI setup in place yet, but the release tag is marked in the commit message with "[ci deploy]"
Fixes#3358
This is a pretty fundamental change in Hugo, but absolutely needed if we should have any hope of getting "multiple outputs" done.
This commit's goal is to say:
* Every file target path is created by `createTargetPath`, i.e. one function for all.
* That function takes every page and site parameter into account, to avoid fragile string parsing to uglify etc. later on.
* The path creation logic has full test coverage.
* All permalinks, paginator URLs etc. are then built on top of that same logic.
Fixes#1252Fixes#2110Closes#2374Fixes#1885Fixes#3102Fixes#3179Fixes#1641Fixes#1989
This commit fixes the base template lookup order to match the behaviour of regular templates.
```
1. <current-path>/<template-name>-baseof.<suffix>, e.g. list-baseof.<suffix>.
2. <current-path>/baseof.<suffix>
3. _default/<template-name>-baseof.<suffix>, e.g. list-baseof.<suffix>.
4. _default/baseof.<suffix>
For each of the steps above, it will first look in the project, then, if theme is set,
in the theme's layouts folder.
```
Fixes#2783
All config variables starts with low-case and uses camelCase.
If there is abbreviation at the beginning of the name, the whole
abbreviation will be written in low-case.
If there is abbreviation at the end of the name, the
whole abbreviation will be written in upper-case.
For example, rssURI.
The gain, given the "real sites benchmark" below, is obvious:
```
benchmark old ns/op new ns/op delta
BenchmarkHugo-4 14497594101 13084156335 -9.75%
benchmark old allocs new allocs delta
BenchmarkHugo-4 57404335 48282002 -15.89%
benchmark old bytes new bytes delta
BenchmarkHugo-4 9933505624 9721984424 -2.13%
```
Fixes#2495
Add logging of the errors/warnings which rst2html outputs to its stderr
stream when rendering rst documents. Note that rst2html outputs warnings
and errors to stderr but it also adds them to the generated html. ->
hugo logs everything in stderr as error.
Add / complete adding page context (path to file being rendered) to
anything logged by getRstContent and getAsciidocContent.
See #2570
Add DocumentName (path to the file being rendered) to RenderingContext
and use that information to include the path in the error print.
See #2399Closes#2567
Add logging of the errors which asciidoc and asciidoctor output to their
stderr stream when converting asciidoc documents. Note that
asciidoctor's exit code may be SUCCESS even if there are ERROR messages
in its stderr output (tested with Asciidoctor 0.1.4 and 1.5.5).
Therefore log the stderr output whenever it is non-empty.
See #2399
This avoids having to execute these expensive operations for sites not using these values.
This commit sums up a set of wordcounting and autosummary related performance improvements.
The effect of these kind of depends on what features your site use, but a benchmark from 4 Hugo sites in the wild shows promise:
```
benchmark old ns/op new ns/op delta
BenchmarkHugo-4 21293005843 20032857342 -5.92%
benchmark old allocs new allocs delta
BenchmarkHugo-4 65290922 65186032 -0.16%
benchmark old bytes new bytes delta
BenchmarkHugo-4 9771213416 9681866464 -0.91%
```
Closes#2378
It is obviously more efficient when we do not care about the actual words.
```
BenchmarkTotalWords-4 100000 18795 ns/op 0 B/op 0 allocs/op
BenchmarkTotalWordsOld-4 30000 46751 ns/op 6400 B/op 1 allocs/op
```
For people using autogenerated summaries, this is one of the hot spots in the memory department.
We don't need to split al the content into words to do proper summary truncation.
This is obviously more effective:
```
BenchmarkTestTruncateWordsToWholeSentence-4 300000 4720 ns/op 0 B/op 0 allocs/op
BenchmarkTestTruncateWordsToWholeSentenceOld-4 100000 17699 ns/op 3072 B/op 3 allocs/op
```
Hugo 0.16 announced support for symbolic links for the root folders, /content, /static etc., but this got broken pretty fast.
The main problem this commit tries to solve is the matching of file change events to "what changed".
An example:
ContentDir: /mysites/site/content where /mysites/site/content is a symlink to /mycontent
/mycontent:
/mypost1.md
/post/mypost2.md
* A change to mypost1.md (on OS X) will trigger a file change event with name "/mycontent/mypost1.md"
* A change to mypost2.md gives event with name "/mysites/site/content/mypost2.md"
The first change will not trigger a correct update of Hugo before this commit. This commit fixes this by doing a two-step check:
1. Check if "/mysites/site/content/mypost2.md" is within /mysites/site/content
2. Check if "/mysites/site/content/mypost2.md" is within the real path that /mysites/site/content points to
Fixes#2265Closes#2273
This is the nth attempt to fix an issue by changing the placeholder token pattern, but
now we actually have tests for all the historic trouble cases.
Fixes#2223
For people having trouble building this.
Now `hugo version` should print something like:
```
Hugo Static Site Generator v0.17-MULTILINGUAL BuildDate: 2016-08-10T08:20:36+02:00
```
The current "rendering language" is needed outside of Site. This commit moves the Language type to the helpers package, and then used to get correct correct language configuration in the markdownify template func.
This commit also adds two new template funcs: relLangURL and absLangURL.
See #2309
This is needed to make shortcode users happy with the new multilanguage support,
but it will also solve many other related posts about "stuff not available in the shortcode".
We will have to revisit this re the handler chain at some point, but that will be easier
now as the integration test story has improved so much.
As part of this commit, the site-building tests in page_test.go is refreshed, they now
tests for all the rendering engines (when available), and all of them now uses the
same code-path as used in production.
Fixes#1229Fixes#2323
Fixes ##1076
Work In Progress!
This commit makes a rework of the build and rebuild process to better suit a multi-site setup.
This also includes a complete overhaul of the site tests. Previous these were a messy mix that
were testing just small parts of the build chain, some of it testing code-paths not even used in
"real life". Now all tests that depends on a built site follows the same and real production code path.
See #2309Closes#2211Closes#477Closes#1744
Implements:
* support to render:
* content/post/whatever.en.md to /en/2015/12/22/whatever/index.html
* content/post/whatever.fr.md to /fr/2015/12/22/whatever/index.html
* gets enabled when `Multilingual:` is specified in config.
* support having language switchers in templates, that know
where the translated page is (with .Page.Translations)
(when you're on /en/about/, you can have a "Francais" link pointing to
/fr/a-propos/)
* all translations are in the `.Page.Translations` map, including the current one.
* easily tweak themes to support Multilingual mode
* renders in a single swift, no need for two config files.
Adds a couple of variables useful for multilingual sites
Adds documentation (content/multilingual.md)
Added language prefixing for all URL generation/permalinking see in the
code base.
Implements i18n. Leverages the great github.com/nicksnyder/go-i18n lib.. thanks Nick.
* Adds "i18n" and "T" template functions..
This issue was introduced as a fix to shortcode not working in RST.
One could argue that Blackfriday and friends should handle `#` in titles, but that will be a discussion
for another day.
The new placeholder pattern should be RST safe and work with titles.
And now with a test so this doesn't break again.
Fixes#2192Fixes#2209Closes#2210
This disables highlighting for fenced code blocks without explicitly specified language. It also introduces a new `PygmentsCodeFencesGuessSyntax` config option (defaulting to false).
To enable syntax guessing again, add the following to your config file: `PygmentsCodeFencesGuessSyntax = true`
This is a breaking change.
This also includes a refactor of the hugofs package and its usage.
The motivation for that is:
The Afero filesystems are brilliant. Hugo's way of adding a dozen of global variables for the different filesystems was a mistake. In readFile (and also in some other places in Hugo today) we need a way to restrict the access inside the working dir. We could use ioutil.ReadFile and implement the path checking, checking the base path and the dots ("..") etc. But it is obviously better to use an Afero BasePathFs combined witha ReadOnlyFs. We could create a use-once-filesystem and handle the initialization ourselves, but since this is also useful to others and the initialization depends on some other global state (which would mean to create a new file system on every invocation), we might as well do it properly and encapsulate the predefined set of filesystems. This change also leads the way, if needed, to encapsulate the file systems in a struct, making it possible to have several file system sets in action at once (parallel multilanguage site building? With Moore's law and all...)
Fixes#1551
This uses the Emoji map from https://github.com/kyokomi/emoji -- but with a custom replacement implementation.
The built-in are fine for most use cases, but in Hugo we do care about pure speed.
The benchmarks below are skewed in Hugo's direction as the source and result is a byte slice,
Kyokomi's implementation works best with strings.
Curious: The easy-to-use `strings.Replacer` is also plenty fast.
```
BenchmarkEmojiKyokomiFprint-4 20000 86038 ns/op 33960 B/op 117 allocs/op
BenchmarkEmojiKyokomiSprint-4 20000 83252 ns/op 38232 B/op 122 allocs/op
BenchmarkEmojiStringsReplacer-4 100000 21092 ns/op 17248 B/op 25 allocs/op
BenchmarkHugoEmoji-4 500000 5728 ns/op 624 B/op 13 allocs/op
```
Fixes#1891
Started to increase coverage in helpers package, now at 74.9% of statements.
In the process, also a few minor changes have been applied to content.go.
* Content.go has undergone a formatting refactor regarding comments
* Unused function TruncateWords has been removed
* RenderingContext's "mmark" has been changed to use MmarkRender
* Content_test.go added to cover content.go's functionality
especially when the given `--source` path is a relative directory.
Also, when `--source` is specified, make WorkingDir an absolute path
from the very beginning, to be consistent with the case when `--source`
is not given. Otherwise, the function name helpers.AbsPathify(), which
prepends WorkingDir to a relative path, does not really make sense.
Fixes#1721
To allow the end users to disable any form of smart dashes
(LaTeX-style or not) while keeping the rest of Blackfriday
SmartyPants features.
Depends on https://github.com/russross/blackfriday/pull/190
"Add HTML_SMARTYPANTS_DASHES for toggling smart dashes"
to be accepted by Blackfriday developers.
Inserts a code tag into Pygments output with the language-info that is present when using client-side highlighting (useful for CSS hooks)
```html
<code class="language-go" data-lang="go">
```
closes#1490
* add global `hasCJKLanguage` flag, if true, turn on auto-detecting CJKLanguage
* add `isCJKLanguage` frontmatter to force specify whether is CJKLanguage or not
* For .Summary: If isCJKLanguage is true, use the runes as basis for truncation, else keep as today.
* For WordCount: If isCJKLanguage is true, use the runes as basis for calculation, else keep as today.
* Unexport RuneCount
Fixes#1377
It currently handles --baseUrl to --baseURL, and --uglyUrls to --uglyURLs.
Special thanks to Eric Paris (@eparis) for writing the
"normalized name" support in Cobra, and for showing us
how it is used in Kubernetes.
See Issue #959
This simplifies the retrieval of the HTML (no more need to extract the
part within body) and also removes the unwanted "Last Updated" part in
the article.
This commit adds a new PygmentsCodeFences config option (default false), which if true will allow GitHub style backtick code fences around code, which will then be rendered by Pygments.
For example:
``` language
your code
```
can be used instead of {{< highlight language >}}your code {{< /highlight >}}.
Fixes#362
Previously if no language was specified, then illegal args would be passed to pygments, for example `pygments -l -fhtml`, which would result in pygments printing an error.
Reduce duplication (`x + FilePathSeparator + y` a few lines away from `filepath.Join(x, y)`) and add a `GetThemeDir()` function to get the current theme's directory.
Also add a comment complaining about the `GetThemesDirPath()` function, which doesn't seem to do what its name would suggest. This might be a candidate for deprecation?
So the taxonomy `Gérard Depardieu` gives paths on the form `gerard-depardieu`.
Unfortunately this introduces two imports from the `golang.org/`, but Unicode-normalization isn't something we'd want to write from scratch.
See https://blog.golang.org/normalization
See #1180
Section names are also used as the title of the list pages, but naming section folders as `Fish and Chips` and similar didn't work very well.
This commit fixes that.
This commit also changes the title casing of the section titles. Some may argue that this is a breaking change, but the old behaviour was also pretty broken,
even for languages that use title capitalizations, as it didn't follow any particular style guide, `fish and chips` became `Fish And Chips` etc.
Now it just turns the first letter into upper case, so `Fish and Chips` will be left as `Fish and Chips`.
People wanting the good old behaviour can use the `title` template func.
Fixes#1176
Setting `RelativeURLs` to `true` will make all relative URLs in the site *really* relative.
And will do so with speed.
So:
In `/post/myblogpost.html`:
`/mycss.css` becomes `../mycss.css`
The same in `/index.html` will become:
`./mycss.css` etc.
Note that absolute URLs will not be touched (either external resources, or URLs constructed with `BaseURL`).
The speediness is about the same as before:
```
benchmark old ns/op new ns/op delta
BenchmarkAbsURL 17462 18164 +4.02%
BenchmarkAbsURLSrcset 18842 19632 +4.19%
BenchmarkXMLAbsURLSrcset 18643 19313 +3.59%
BenchmarkXMLAbsURL 9283 9656 +4.02%
benchmark old allocs new allocs delta
BenchmarkAbsURL 24 28 +16.67%
BenchmarkAbsURLSrcset 29 32 +10.34%
BenchmarkXMLAbsURLSrcset 27 30 +11.11%
BenchmarkXMLAbsURL 12 14 +16.67%
benchmark old bytes new bytes delta
BenchmarkAbsURL 3154 3404 +7.93%
BenchmarkAbsURLSrcset 2376 2573 +8.29%
BenchmarkXMLAbsURLSrcset 2569 2763 +7.55%
BenchmarkXMLAbsURL 1888 1998 +5.83%
```
Fixes#1104Fixes#622Fixes#937Fixes#157
Many minor fixes to make test logs more consistent and correct a
mispelling.
Standardize on "[%i] got X but expected Y" for log messages. Using
a consistent layout makes it easier to read the test results. This
was mostly changing "Got" to "got". Swapped the order of values on
several calls to bring them in line with the convention.
A few log messages had a sequence number added to identify the
exact scenario that failed. Otherwise, there would be no way to
ascertain which failed When there are many scenarios.
Correct spelling of "expected."
Fixes#1028
Merged be2097e1ad
[close#1040]
Fixes part of issue 1030. Previously hugo only listed the content
directory as being watched. Now we list all files being watched
according to `commands.getDirList()`. We also introduce a RemoveSubpaths
function and test in the helpers module to reduce noise in the command
line output by not showing subdirectories of ones already being watched.
For example, instead of:
`Watching for changes in $HOME/blog/content`
We get:
`Watching for changes in
$HOME/blog/{data,content,layouts,static,themes/my-theme}`
`Paginate`now returns error when
1) `.Paginate` is called after `.Paginator`
2) `.Paginate` is repeatedly called with different arguments
This should help remove some confusion.
This commit also introduces DistinctErrorLogger, to prevent spamming the log for duplicate rendering errors from the pagers.
Fixes#993
As views looks like a regular template, but doesn't need a base template, we have to look inside it.
Altough really not needed by this commit, reading the full file content into memory just to do a substring search is a waste.
So this commit implements a `ReaderContains` func that in most cases should be much faster than doing an `ioutil.ReadAll` and `bytes.Contains`:
```
benchmark old ns/op new ns/op delta
BenchmarkReaderContains 78452 20260 -74.18%
benchmark old allocs new allocs delta
BenchmarkReaderContains 46 20 -56.52%
benchmark old bytes new bytes delta
BenchmarkReaderContains 46496 1258 -97.29%
```
Fixes#999
Put version handling into the helpers package so it can be used by many,
and split version and suffix to make it possible to calculate the next Hugo version.
Thanks to @bep's new, brilliant helpers.Deprecated() function,
the following functions or variables are transitioned to their
new names, preserving backward compatibility for v0.14
and warning the user of upcoming obsolescence in v0.15:
* .Url → .URL (for node, menu and paginator)
* .Site.BaseUrl → .Site.BaseURL
* .Site.Indexes → .Site.Taxonomies
* .Site.Recent → .Site.Pages
* getJson → getJSON
* getCsv → getCSV
* safeHtml → safeHTML
* safeCss → safeCSS
* safeUrl → safeURL
Also fix related initialisms in strings and comments.
Continued effort in fixing #959.
See #470
* Based on existing support for reStructuredText files
* Handles content files with extensions `.asciidoc` and `.ad`
* Pipes content through `asciidoctor --safe -`.
If `asciidoctor` is not installed, then `asciidoc --safe -`.
* To make sure `asciidoctor` or `asciidoc` is found, after adding
a piece of AsciiDoc content, run `hugo` with the `-v` flag
and look for this message:
INFO: 2015/01/23 Rendering with /usr/bin/asciidoctor ...
Caveats:
* The final "Last updated" timestamp is currently not stripped.
* When `hugo` is run with `-v`, you may see a lot of these messages
INFO: 2015/01/23 Rendering with /usr/bin/asciidoctor ...
if you have lots of `*.ad`, `*.adoc` or `*.asciidoc` files.
* Some versions of `asciidoc` may have trouble with its safe mode.
To test if you are affected, try this:
$ echo "Hello" | asciidoc --safe -
asciidoc: ERROR: unsafe: ifeval invalid
asciidoc: FAILED: ifeval invalid safe document
If so, I recommend that you install `asciidoctor` instead.
Feedback and patches welcome!
Ideally, we should be using https://github.com/VonC/asciidocgo,
@VonC's wonderful Go implementation of Asciidoctor. However,
there is still a bit of work needed for asciidocgo to expose
its API so that Hugo can actually use it.
Until then, hope this "experimental AsciiDoc support through external
helpers" can serve as a stopgap solution for our community. :-)
2015-01-30: Updated for the replaceShortcodeTokens() syntax change
2015-02-21: Add `.adoc` extension as suggested by @Fale
Conflicts:
helpers/content.go
First step to use initialisms that golint suggests,
for example:
Line 116: func GetHtmlRenderer should be GetHTMLRenderer
as see on http://goreportcard.com/report/spf13/hugo
Thanks to @bep for the idea!
Note that command-line flags (cobra and pflag)
as well as struct fields like .BaseUrl and .Url
that are used in Go HTML templates need more work
to maintain backward-compatibility, and thus
are NOT yet dealt with in this commit.
First step in fixing #959.
Make sure that the file separator is added to the temp dir in all cases.
This prevents cache temp files being written to the root temp folder.
Fixes#910
Temporary workaround for the bug fix and resulting
behavioral change in purell.NormalizeURLString():
a leading '/' was inadvertently to relative links,
but no longer, see #878.
I think the real solution is to allow Hugo to
make relative URL with relative path,
e.g. "../../post/hello-again/", as wished by users
in issues #157, #622, etc., without forcing
relative URLs to begin with '/'.
Once the fixes are in, let's remove this kludge
and restore SanitizeUrl() to the way it was.
Fixes#878
Allocates less memory:
benchmark old ns/op new ns/op delta
BenchmarkStripHTML 6572 6695 +1.87%
benchmark old allocs new allocs delta
BenchmarkStripHTML 5 4 -20.00%
benchmark old bytes new bytes delta
BenchmarkStripHTML 848 737 -13.09%
Compared to 0.12:
benchmark old ns/op new ns/op delta
BenchmarkStripHTML 10210 6695 -34.43%
benchmark old allocs new allocs delta
BenchmarkStripHTML 6 4 -33.33%
benchmark old bytes new bytes delta
BenchmarkStripHTML 1456 737 -49.38%
go test -test.run=NONE -bench=".*" -test.benchmem=true ./helpers
Old vs new impl (string.Replace vs string.Replacer):
benchmark old ns/op new ns/op delta
BenchmarkStripHTML 10210 6572 -35.63%
benchmark old allocs new allocs delta
BenchmarkStripHTML 6 5 -16.67%
benchmark old bytes new bytes delta
BenchmarkStripHTML 1456 848 -41.76%
The variable scope in the Go templates makes it hard, if possible at all, to write templates with counter variables or similar state.
This commit fixes that by adding a writable context to Node, backed by a map: Scratch.
This context has three methods, Get, Set and Add. The Add is tailored for counter variables, but can be used for any built-in numeric values or strings.
The paths were seen as changed but not static because of the backslashes in
ev.Name. Once the backslashes were added, I discovered that the JSON
sent to livereload was invalid and failed to work because it had backslashes.
Hence the code to replace the backslashes from the path to make them work
in JSON and for the URL.
With this fix, changes to a stylesheet are shown on the page, and if it's a
single file that changed, it's reflected in the browser without reloading the whole
page.
Two new configuration properties, `Paginate` (default `0`) and `PaginatePath` (default `page`) are added.
Setting `paginate` to a positive value will split the list pages for the home page, sections and taxonomies into chunks of size of the `paginate` property.
A `.Paginator` is provided to help building a pager menu.
There are two ways to configure a `.Paginator`:
1. The simplest way is just to call `.Paginator.Pages` from a template. It will contain the pages for "that page" (`.Data.Pages` will (like today) contain all the pages).
2. Select a sub-set of the pages with the available template functions and pass the slice to `.Paginate` : `{{ range (.Paginate (where .Data.Pages "Type" "post")).Pages }}`
**NOTE:** For a given Node, it's one of the options above. It's perfectly legitimate to iterate over the same pager more than once, but it's static and cannot change.
The `.Paginator` contains enough information to build a full-blown paginator interface.
The pages are built on the form (note: BLANK means no value, i.e. home page):
```
[SECTION/TAXONOMY/BLANK]/index.html
[SECTION/TAXONOMY/BLANK]/page/1/index.html => redirect to [SECTION/TAXONOMY/BLANK]/index.html
[SECTION/TAXONOMY/BLANK]/page/2/index.html
....
```
Fixes#96
Make Blackfriday's `HTML_SMARTYPANTS_FRACTIONS` option
user-configurable. Defaults to `true` as before. See
discussions at:
http://discuss.gohugo.io/t/any-way-to-disable-smart-fractions/328
Thanks to @bjornerik and @spf13 for laying the groundwork
making it easy to expose Blackfriday's underlying configurable
options.
canonifyUrls=true, RelPermalink and baseUrl with sub-path did not work.
This fixes that by adding a check for canonifyUrl=trues=true in RelPermalink().
So given
- baseUrl "http://somehost.com/sub/"
- the path "some-path/file.html"
For canonifyUrls=false RelPermalink() returns "/sub/some-path/file.html"
For canonifyUrls=true RelPermalink() returns "/some-path/file.html"
In the last case, the Url will be made absolute and clickable in a later step.
This commit also makes the menu urls defined in site config releative. To make them work with canonifying of urls, the context root is prepended if canonifying is turned off.
Fixes#519Fixes#711
(Experimental) reStructuredText support was working in v0.12,
but was no longer handled after some refactoring in v0.13-DEV.
That experimental support is now restored.
Furthermore, check for both rst2html and rst2html.py in the PATH,
and execute whichever is found.
See #472 for more information.
