This PR fixes #7598 by providing a configurable way of signing commits across the Gitea instance. Per repository configurability and import/generation of trusted secure keys is not provided by this PR - from a security PoV that's probably impossible to do properly. Similarly web-signing, that is asking the user to sign something, is not implemented - this could be done at a later stage however.

## Features
- [x] If commit.gpgsign is set in .gitconfig sign commits and files created through repofiles. (merges should already have been signed.)
- [x] Verify commits signed with the default gpg as valid
- [x] Signer, Committer and Author can all be different
    - [x] Allow signer to be arbitrarily different - We still require the key to have an activated email on Gitea. A more complete implementation would be to use a keyserver and mark external-or-unactivated with an "unknown" trust level icon.
- [x] Add a signing-key.gpg endpoint to get the default gpg pub key if available
    - Rather than add a fake web-flow user I've added this as an endpoint on /api/v1/signing-key.gpg
    - [x] Try to match the default key with a user on gitea - this is done at verification time
- [x] Make things configurable?
    - app.ini configuration done
    - [x] when checking commits are signed need to check if they're actually verifiable too
- [x] Add documentation

I have decided that adjusting the docker to create a default gpg key is not the correct thing to do and therefore have not implemented this.

* Make link last commit massages in repository home page and commit tables

* Use RenderCommitMessageLink instead surround with a

* deleted __debug_bin file

* Exclude email to link from latest commit title

* Exclude email processor from commit table

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

* Add class parameter to a html element creator functions.
Make links underline dashed that are not commit

* fix tests

* Show dashed underline when also not hovered

* Provide links in commit summaries in commits table/view list

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

* Check that hashes are commits before making them links

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

* Revert "Check that hashes are commits before making them links"

This reverts commit a88564b8bc.

* Add Commit Message Links to Files List

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

* Prevent Commit Status From Overflowing On Branch Page

It is possible for the commit ci status
on the branches page for a repository to
become an ellipsis due to overflowing.

This commit will fix that issue by
using flex.

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

* Fix multiple overflowing issues in commits table

It was possible that the commit message would
overflow hiding the expand commits button
and commit status. This change ensures that
the correct elements overflow without hiding
anything else.

This change also reverts using flex in the
commits list because it was causing issues
in Blink based browsers.

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

* Remove unnecessary html element and fix indentation issues

- Fix layout overflow in repo file list.
- Fix invisible status icon in file view and commit list. In file view,
  the icon was moved to the left because I could not figure out a proper
  fix because of HTML tables.
- Added title attribute to commit messages.
- Fixed two CSS linter warnings in existing CSS.
- Fixed CI variable check in 'make css'.

Fixes: https://github.com/go-gitea/gitea/issues/7180

* Supports tags when comparing commits or branches

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Hide headline when only comparing and don't load unused data

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Merges compare logics to allow comparing branches, commits and tags with eachother

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Display branch or tag instead of commit when used for comparing

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Show pull request form after click on button

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Transfers relevant pull.go changes from master to compare.go

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Fixes error when comparing forks against a commit or tag

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Removes console.log from JavaScript file

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Show icon next to commit reference when comparing branch or tag

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Updates css file

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Fixes import order

* Renames template variable

* Update routers/repo/compare.go

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

* Update from master

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Allow short-shas in compare

* Renames prInfo to compareInfo

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Check PR permissions only if compare is pull request

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Adjusts comment

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Use compareInfo instead of prInfo

* Don't post process commit summary in templates

Don't run summary through render/post process to avoid it generating
links and breaking certain views where the summary is already expected
to be a link to the commit. For consistancy, disable processing of
summary in all locations.

Fixes #6809

* Do process title on diff page

On second thought, the title is often the only place a pull request
number will exists so do process it on the individual diff page. This
fixes the list view and still gives easy access to the PR link

* Support searching commits with prefix syntax

For now, support auther: committer:
When more than one prefix is supplied is presented, the result is the union.
When different prefixes are supplied, the result is the intersection.

For example,
"author:alice author:bob"
=> the result is all commits authored by Alice OR Bob

"hello committer:alice"
=> the result is all commits committed by Alice AND has the keyword
'hello' in the message.

Note that there should NOT have any space after the colon(:) of the prefix.
For example,
"author:bill" => correct
"author: bill" => wrong

* Remove unneeded logging

* Add missing files of test repository

* Add missing repo_unit entries to test fixtures

* Update test cases

* Add tooltip for commits search button

* Update tooltip text

I have no idea about how to format it with line breaks.

* Make the usage example more real

* Add a test case

* Add new options struct for SearchCommits

* Prefer len(s) > 0 over s != ""

* Add NewSearchCommitsOptions

* Prevent 500 if there is no common mergebase
* Prevent creation of PR with no history

Signed-off-by: Robin Durner <github@nubenum.de>

I wanted navigation to the page "first" and the page
"last" of the pages of commits. I discovered this
has already been implemented in one of the templates.

Signed-off-by: Tan Pheng Heong <phtan90@gmail.com>

The choice regarding which forms should or should not trigger a warning
is subjective. I tried to be consistent and not warn about forms that:
 - run an action, rather than edit data: search, send an email.
 - delete data: a warning about losing data would be confusing

Note that forms on sign-in pages were already ignored (using a selector,
rather than an explicit class on the form element).

Fixes #3698.

* Viewport meta tag

* responsive: dashboard

* responsive: issues page

* responsive: Explore page

* responsive: navbar, and some navbar css refactoring

* responsive: button for collapsing navbar in mobile view

* Mark the hamburger button as active when pressed

* better homepage for responsive views

* Bring back jump class in navbar

The class was necessary, because this way the
dropdown doesn't assume the contents of the
selected item.

* make repository homes responsive

* Make file view page responsive

* Make forms look good on responsive views

* make commits and commit diff view responsive

* issues and PRs

* responsive wiki

* Don't place auto-init far off the page

* Minor changes to amend broken stuff

minor improvements

- make login/sign up in navbar stackable
- make navbar in explore and sign in not stackable

Change selected class in TestPullCompare

Fix typo that happened when rebasing

fix dashboard on org view

improve profile UI

Use clearing on file diff to fix broken UI caused by floating elements

remove unresolved merge conflict, and | Sanitize

Fix repo home not loading

* Initial working state of expandable commit bodies

* Fix all commits having showing button for multiline commits

* Refactor checking multiline messages method

* Force newlines with <br> in commit body

* Show multiple lines in the list view of repositories

* Fixed proper newlines and minor refactor

Use <pre> instead of <p>, this is so we can use \n instead of having to manually place <br> into the HTML. Makes it easier to display commit bodies.

* Fix commit list messages jumping around

* Fix indentation in view_list.tmpl

* Use vertical-align: baseline instead of top

* Refactor commit button toggle function

* Remove RenderCommitBodyLink function

* Add comments

* Add newline at the end of _repository.less

* Fix long commit bodies not properly wrapping inside <pre>

* Don't split on double newlines

* Show the commit body in commit view

* Update stylesheets

* Add/fix comments and run make fmt

* Fix spaces not being tabs

* Fix issue link rendering in commit messages

* Update page.tmpl

* No links for parens

* remove comment

* Make URL scheme unambiguous

Redirect old routes to new routes

* Fix redirects to new URL scheme, and update template

* Fix branches/_new endpoints, and update integration test

* Display commit status on landing page of repo

* improve last status of commits and add link to ci

* fix last commit status since the order of ids are desc

* Show commit status icon in commits table

* Add comments

* Fix icons

* Few more places where commit table is displayed

* Change integration test to use goquery for parsing html

* Add integration tests for commit table and status icons

* Fix status to return lates status correctly on all databases

* Rewrote lates commit status selects

* Fix button text to be consisstent with rest of UI

* Make all commits checkbox look nicer

* GPG commit validation

* Add translation

+ some little fix

* Move hash calc after retrieving of potential key + missing translation

* Add some little test

Signed-off-by: Stephen Brown <steve@evolvedlight.co.uk>

and updating the vendor directory

This commit improves templates readability, since all of them use consistent
indent with all template command blocks indented too.

1. Indents both HTML containers such as <div>, <p> and Go HTML template blocks
   such as {{if}} {{with}}

2. Cleans all trailing white-space

3. Adds trailing last line-break to each file

Most commit in Git are expected to follow standard of single header line,
followed by description paragraphs, separated by empty line from previous block.

Previously Gogs were treating everything as single header. Now we are trying to
render only first line as header, but following lines (description chunks) as a
verbatim.

Current green SHA1 labels are more pronounced than other UI elements attracting
attention as if they were most important thing in the UI, while they are not as
important, especially without real Git client.

Using grey SHA1 labels makes the UI more balanced, less aggressive and lets
user to focus on other content elements.

NOTE: Neither GitHub or Bitbucket uses so heavy pronunciation as Gogs.

Instead using own ellipsis, uses Semantic UI fixed single line table which
effectively applies ellipsis to all overflowing table cells.

NOTE: File list cannot use colspan="2" for 1st "Last commit" elements,
otherwise layout breaks with fixed table.

- update russian locale