* Move to goldmark

Markdown rendering moved from blackfriday to the goldmark.

Multiple subtle changes required to the goldmark extensions to keep
current rendering and defaults.

Can go further with goldmark linkify and have this work within markdown
rendering making the link processor unnecessary.

Need to think about how to go about allowing extensions - at present it
seems that these would be hard to do without recompilation.

* linter fixes

Co-authored-by: Lauris BH <lauris@nix.lv>

* Prefix all user-generated IDs in markup
* Add user-content- to IDs in unit-tests
* fixup markdown_test.go
* update the hrefs for the wiki test
* Add blackfriday extension regex

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Convert EOL to UNIX-style to render MD properly

* Update modules/markup/markdown/markdown.go

Co-Authored-By: zeripath <art27@cantab.net>

* Fix lint optimization

* Check for empty content before conversion

* Update modules/util/util.go

Co-Authored-By: zeripath <art27@cantab.net>

* Improved checks and tests

* Add paragraph render test

* Improve speed even more, improve tests

* Small improvement by @gary-kim

* Fix test for DOS

* More improvements

* Restart CI

* Rewrite markdown rendering to blackfriday v2.0

* Fix style

* Fix go mod with golang 1.13

* Fix blackfriday v2 import

* Inital orgmode renderer migration to go-org

* Vendor go-org dependency

* Ignore errors :/

* Update go-org to latest version

* Update test

* Fix go-org test

* Remove unneeded code

* Fix comments

* Fix markdown test

* Fix blackfriday regression rendering HTML block

* Check commit message hashes before making links

Previously, when formatting commit messages, anything
that looked like SHA1 hashes was turned into a link
using regex. This meant that certain phrases or numbers
such as `777777` or `deadbeef` could be recognized as a commit
even if the repository has no commit with those hashes.

This change will make it so that anything that looks
like a SHA1 hash using regex will then also be checked
to ensure that there is a commit in the repository
with that hash before making a link.

Signed-off-by: Gary Kim <gary@garykim.dev>

* Use gogit to check if commit exists

This commit modifies the commit hash check
in the render for commit messages to use
gogit for better performance.

Signed-off-by: Gary Kim <gary@garykim.dev>

* Make code cleaner

Signed-off-by: Gary Kim <gary@garykim.dev>

* Use rev-parse to check if commit exists

Signed-off-by: Gary Kim <gary@garykim.dev>

* Add and modify tests for checking hashes in html link rendering

Signed-off-by: Gary Kim <gary@garykim.dev>

* Return error in sha1CurrentPatternProcessor

Co-Authored-By: mrsdizzie <info@mrsdizzie.com>

* Import Gitea log module

Signed-off-by: Gary Kim <gary@garykim.dev>

* Revert "Return error in sha1CurrentPatternProcessor"

This reverts commit 28f561cac4.

Signed-off-by: Gary Kim <gary@garykim.dev>

* Add debug logging to sha1CurrentPatternProcessor

This will log errors by the git command run in
sha1CurrentPatternProcessor if the error is one
that was unexpected.

Signed-off-by: Gary Kim <gary@garykim.dev>

No need to convert to the same type.

Since #6273 was merged, we now have access to proper context metas
always. Update SHA generated links to use these instead of urlPrefix.

Update tests as well.

Fixes #4536.

* Improve issue autolinks

Update autolinks to match what github does here:

Issue in same repo: #1
Issue in different repo: org/repo#1

Fixes #6264

* Use setting.AppURL when parsing URL

Using setting.AppURL here is a more reliable way of parsing the current
URL and what other functions in this file seem to use.

* Make ComposeMetas always return a valid context

* Add per repository markdown renderers for better context

* Update for use of context metas

Now that we include the user and repo name inside context metas, update
various code and tests for this new logic

* Markdown: enable some more extensions

Improve Markdown-rendering by enabling some extensions:

- enable definitions lists
- enable footnotes
- enable header-ids and automatically generate header-ids (for linking to README-sections or creating table-of-contents for larger READMEs)

* Markdown: update and exted tests

Update and add tests for additionally enabled Markdown-extensions.

* Fix markdown image with link

* Add gitea copyright notice

* add a test for markdown image with link

* remove svg related variables

* Get rid of autolink

* autolink in markdown

* Replace email addresses with mailto links

* better handling of links

* Remove autolink.js from footer

* Refactor entire html.go

* fix some bugs

* Make tests green, move what we can to html_internal_test, various other changes to processor logic

* Make markdown tests work again

This is just a description to allow me to force push in order to restart
the drone build.

* Fix failing markdown tests in routers/api/v1/misc

* Add license headers, log errors, future-proof <body>

* fix formatting

* Populate URL field of API commits

* fix orgmode_test

* add init support of orgmode document type on file view and readme

* fix imports

* fix imports and readmeExist

* fix imports order

* fix format

* remove unnecessary convert