fixed getzola#2195

* Reuse Client when checking urls and add timeout for requests

* Implement replace_re filter

* Cargo fmt

* add regex caching

* cargo fmt

* update docs, update unit test

* rename replace_re -> regex_replace

Relative links in the entry content do not currently have a base URI, so
will be resolved relative to the feed URI:

Given an entry with the content:

    <a href="some-resource.bin">

And URIS of:

 * entry: https://example.org/blog/some-entry/
 * feed:  https://example.org/atom.xml

The link URI will end up as:

    https://example.org/some-resource.bin

rather than the URI that ends up resolved in the rendered page:

   https://example.org/blog/some-entry/some-resource.bin

The atom and RSS formats allow for an xml:base attribute (itself
specified in [1]) to provide a base URI of a subset of a document. This
change adds xml:base attributes to each entry, using the page permalink.

This gives us something equivalent to:

    <entry>
     <content xml:base="https://example.org/blog/some-entry/">
      <![CDATA[
       <a href="some-resource.bin">
      ]]>
     </content>
    </entry>

[1]: https://www.w3.org/TR/xmlbase/

Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>

* Fix multi-ligual json index

* multi-lingual search Fix cargo fmt

…tzola#2196)

* Add search into the serialized config (getzola#2165)

* Only expose index_format

* Create config.search struct

* cargo fmt

* Fix hard link panic and add better error info to std:fs errors

* cargo fmt

* Remove erroneously committed config change

* Remove console import; Use with context to provide additional error info

* improve error wording

* Add optional decoding="async" loading="lazy" for img

In theory, they can make the page load faster and show content faster.

There’s one problem: CommonMark allows arbitrary inline elements in alt text.
If I want to get the correct alt text, I need to match every inline event.

I think most people will only use plain text, so I only match Event::Text.

* Add very basic test for img

This is the reason why we should use plain text when lazy_async_image is enabled.

* Explain lazy_async_image in documentation

* Add test with empty alt and special characters

I totaly forgot one can leave the alt text empty.
I thought I need to eliminate the alt attribute in that case,
but actually empty alt text is better than not having an alt attribute at all:
https://www.w3.org/TR/WCAG20-TECHS/H67.html
https://www.boia.org/blog/images-that-dont-need-alternative-text-still-need-alt-attributes
Thus I will leave the empty alt text.

Another test is added to ensure alt text is properly escaped.
I will remove the redundant escaping code after this commit.

* Remove manually escaping alt text

After removing the if-else inside the arm of Event::Text(text),
the alt text is still escaped.
Indeed they are redundant.

* Use insta for snapshot testing

`cargo insta review` looks cool!

I wanted to dedup the cases variable,
but my Rust skill is not good enough to declare a global vector.

…atter (getzola#2237)

* Prevent spans crossing line boundaries in class formatter

* Add snapshot tests for classed highlighting

* sort page.assets by filename

Uses .to_str() to sort files and subfolders.

The .unwrap() may need work or be replaced by unwrap_or_default(). Given
earlier checks in the function it should work however.

* add tests for assets sorting

* fix rustfmt

* use existing loop instead of windows

* also check the non-recursive test

* use .zip() and add assert msg

* templates:atom: add support for multiple authors

Atom 1.0 [0] support multiple `<author>` entries in the feed. This commit
modified the template to generate as many `<author>` as the page's
metadata contains.

[0] https://validator.w3.org/feed/docs/atom.html#recommendedEntryElements

* Test we can have multiple authors in ATOM feeds

The `rel` and `type` HTML attributes are needed in the `base_url` (or
`section.permalink`) link so feed aggregators know that's the HTML page
that corresponds to the atom feed.

Note: The RSS template doesn't have this issue.

…fig file not present (getzola#2262)

* use fs canonicalize to prevent path traversal

* fix cargo fmt

* Add ignored_static to config

* Make  handle ignored static files correctly

* cargo fmt

* Match on relative path rather than incorrect target path

* path -> partial path for serve static ignore

* remove debug println

* copy static directory if there is no ignored globset

* Update docs

* Deduplicate code with additional Option argument

* cargo fmt

* template:feeds: add extra block

* add missing >

* Revert "add missing >"

This reverts commit 45c6b9c.

* Revert "template:feeds: add extra block"

This reverts commit 596f7f1.

* Update docs for feed templates

)

* Introduce option to force directory when running the serve command

* Update documentation about the force flag on the serve command

* Resolve cargo fmt issue

* Reword new serve flag documentation

…etzola#2287)

The warning about unknown highlight languages was displayed even when
code highlighting was disabled via `markdown.highlight_code = false`.
This commit adds a condition to check this setting before issuing the
warning, effectively suppressing it when code highlighting is disabled.

Issue: getzola#2280

* Fixed "unnecessary mut" warning

* Fixed minor typo

* Use more than 8 threads for links checking if hardware supports it

* Fixed failing azure Linux check

* Avoid unnecessary HTTP requests to the same, already checked links

This allows benefitting from some bugfixes (potentially breaking but
better compatibility with the reference Sass impl)

Co-authored-by: Sandor Apati <s.apati@mito.hu>

Closes getzola#2065

* Make a test that replicates the issue regarding section paths not respecting page parents

* Add a very rudimentary working implementation that passes the test

* Rewrite solution to be more idiomatic rust