### Overview
This is the implementation of Code Frequency page. This feature was
mentioned on these issues: #18262, #7392.
It adds another tab to Activity page called Code Frequency. Code
Frequency tab shows additions and deletions over time since the
repository existed.
Before:
<img width="1296" alt="image"
src="https://github.com/go-gitea/gitea/assets/32161460/2603504f-aee7-4929-a8c4-fb3412a7a0f6">
After:
<img width="1296" alt="image"
src="https://github.com/go-gitea/gitea/assets/32161460/58c03721-729f-4536-a663-9f337f240963">
---
#### Features
- See additions deletions over time since repository existed
- Click on "Additions" or "Deletions" legend to show only one type of
contribution
- Use the same cache from Contributors page so that the loading of data
will be fast once it is cached by visiting either one of the pages
---------
Co-authored-by: Giteabot <teabot@gitea.io>
Fix#29175
Replace #29207
This PR makes some improvements to the `issue_comment` workflow trigger
event.
1. Fix the bug that pull requests cannot trigger `issue_comment`
workflows
2. Previously the `issue_comment` event only supported the `created`
activity type. This PR adds support for the missing `edited` and
`deleted` activity types.
3. Some events (including `issue_comment`, `issues`, etc. ) only trigger
workflows that belong to the workflow file on the default branch. This
PR introduces the `IsDefaultBranchWorkflow` function to check for these
events.
GitLab generates "system notes" whenever an event happens within the
platform. Unlike Gitea, those events are stored and retrieved as text
comments with no semantic details. The only way to tell whether a
comment was generated in this manner is the `system` flag on the note
type.
This PR adds detection for two specific kinds of events: Scheduling and
un-scheduling of automatic merges on a PR. When detected, they are
downloaded using Gitea's type for these events, and eventually uploaded
into Gitea in the expected format, i.e. with no text content in the
comment.
This PR also updates the template used to render comments to add support
for migrated comments of these two types.
ref:
11bd6dc826/app/services/system_notes/merge_requests_service.rb (L6-L17)
---------
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
https://github.com/go-gitea/gitea/pull/27172#discussion_r1493735466
When cleanup artifacts, it removes storage first. If storage is not
exist (maybe delete manually), it gets error and continue loop. It makes
a dead loop if there are a lot pending but non-existing artifacts.
Now it updates db record at first to avoid keep a lot of pending status
artifacts.
Fix#29166
Add support for the following activity types of `pull_request`
- assigned
- unassigned
- review_requested
- review_request_removed
- milestoned
- demilestoned
There is a missing newline when generating the debian apt repo InRelease
file, which results in output like:
```
[...]
Date: Wed, 14 Feb 2024 05:03:01 UTC
Acquire-By-Hash: yesMD5Sum:
51a518dbddcd569ac3e0cebf330c800a 3018 main-dev/binary-amd64/Packages
[...]
```
It appears this would probably result in apt ignoring the
Acquire-By-Hash setting and not using the by-hash functionality,
although I'm not sure how to confirm it.
Old code is not consistent for generating & decoding the JWT secrets.
Now, the callers only need to use 2 consistent functions:
NewJwtSecretWithBase64 and DecodeJwtSecretBase64
And remove a non-common function Base64FixedDecode from util.go
Continuation of https://github.com/go-gitea/gitea/pull/25439. Fixes#847
Before:
<img width="1296" alt="image"
src="https://github.com/go-gitea/gitea/assets/32161460/24571ac8-b254-43c9-b178-97340f0dc8a9">
----
After:
<img width="1296" alt="image"
src="https://github.com/go-gitea/gitea/assets/32161460/c60b2459-9d10-4d42-8d83-d5ef0f45bf94">
---
#### Overview
This is the implementation of a requested feature: Contributors graph
(#847)
It makes Activity page a multi-tab page and adds a new tab called
Contributors. Contributors tab shows the contribution graphs over time
since the repository existed. It also shows per user contribution graphs
for top 100 contributors. Top 100 is calculated based on the selected
contribution type (commits, additions or deletions).
---
#### Demo
(The demo is a bit old but still a good example to show off the main
features)
<video src="https://github.com/go-gitea/gitea/assets/32161460/9f68103f-8145-4cc2-94bc-5546daae7014" controls width="320" height="240">
<a href="https://github.com/go-gitea/gitea/assets/32161460/9f68103f-8145-4cc2-94bc-5546daae7014">Download</a>
</video>
#### Features:
- Select contribution type (commits, additions or deletions)
- See overall and per user contribution graphs for the selected
contribution type
- Zoom and pan on graphs to see them in detail
- See top 100 contributors based on the selected contribution type and
selected time range
- Go directly to users' profile by clicking their name if they are
registered gitea users
- Cache the results so that when the same repository is visited again
fetching data will be faster
---------
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: hiifong <i@hiif.ong>
Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: yp05327 <576951401@qq.com>
Clarify when "string" should be used (and be escaped), and when
"template.HTML" should be used (no need to escape)
And help PRs like #29059 , to render the error messages correctly.
With this option, it is possible to require a linear commit history with
the following benefits over the next best option `Rebase+fast-forward`:
The original commits continue existing, with the original signatures
continuing to stay valid instead of being rewritten, there is no merge
commit, and reverting commits becomes easier.
Closes#24906
The old code `GetTemplatesFromDefaultBranch(...) ([]*api.IssueTemplate,
map[string]error)` doesn't really follow Golang's habits, then the
second returned value might be misused. For example, the API function
`GetIssueTemplates` incorrectly checked the second returned value and
always responds 500 error.
This PR refactors GetTemplatesFromDefaultBranch to
ParseTemplatesFromDefaultBranch and clarifies its behavior, and fixes the
API endpoint bug, and adds some tests.
And by the way, add proper prefix `X-` for the header generated in
`checkDeprecatedAuthMethods`, because non-standard HTTP headers should
have `X-` prefix, and it is also consistent with the new code in
`GetIssueTemplates`
Outgoing new release e-mail notifications were missing links to the
actual release. An example from Codeberg.org e-mail:
<a href=3D"">View it on Codeberg.org</a>.<br/>
This PR adds `"Link"` context property pointing to the release on the
web interface.
The change was tested using `[mailer] PROTOCOL=dummy`.
Signed-off-by: Wiktor Kwapisiewicz <wiktor@metacode.biz>
Resolves https://github.com/go-gitea/gitea/issues/28704
Example of an entry in the generated `APKINDEX` file:
```
C:Q1xCO3H9LTTEbhKt9G1alSC87I56c=
P:hello
V:2.12-r1
A:x86_64
T:The GNU Hello program produces a familiar, friendly greeting
U:https://www.gnu.org/software/hello/
L:GPL-3.0-or-later
S:15403
I:36864
o:hello
m:
t:1705934118
D:so:libc.musl-x86_64.so.1
p:cmd:hello=2.12-r1
i:foobar=1.0 !baz
k:42
```
the `i:` and `k:` entries are new.
---------
Co-authored-by: KN4CK3R <admin@oldschoolhack.me>
Fixes#28660
Fixes an admin api bug related to `user.LoginSource`
Fixed `/user/emails` response not identical to GitHub api
This PR unifies the user update methods. The goal is to keep the logic
only at one place (having audit logs in mind). For example, do the
password checks only in one method not everywhere a password is updated.
After that PR is merged, the user creation should be next.
Emails from Gitea comments do not contain the username of the commenter
anywhere, only their display name, so it is not possible to verify who
made a comment from the email itself:
From: "Alice" <email@gitea>
X-Gitea-Sender: Alice
X-Gitea-Recipient: Bob
X-GitHub-Sender: Alice
X-GitHub-Recipient: Bob
This comment looks like it's from @alice.
The X-Gitea/X-GitHub headers also use display names, which is not very
reliable for filtering, and inconsistent with GitHub's behavior:
X-GitHub-Sender: lunny
X-GitHub-Recipient: gwymor
This change includes both the display name and username in the From
header, and switches the other headers from display name to username:
From: "Alice (@fakealice)" <email@gitea>
X-Gitea-Sender: fakealice
X-Gitea-Recipient: bob
X-GitHub-Sender: fakealice
X-GitHub-Recipient: bob
This comment looks like it's from @alice.
This change allows act_runner / actions_runner to use jwt tokens for
`ACTIONS_RUNTIME_TOKEN` that are compatible with
actions/upload-artifact@v4.
The official Artifact actions are now validating and extracting the jwt
claim scp to get the runid and jobid, the old artifact backend also
needs to accept the same token jwt.
---
Related to #28853
I'm not familar with the auth system, maybe you know how to improve this
I have tested
- the jwt token is a valid token for artifact uploading
- the jwt token can be parsed by actions/upload-artifact@v4 and passes
their scp claim validation
Next steps would be a new artifacts@v4 backend.
~~I'm linking the act_runner change soonish.~~
act_runner change to make the change effective and use jwt tokens
<https://gitea.com/gitea/act_runner/pulls/471>
In #28691, schedule plans will be deleted when a repo's actions unit is
disabled. But when the unit is enabled, the schedule plans won't be
created again.
This PR fixes the bug. The schedule plans will be created again when the
actions unit is re-enabled
## Purpose
This is a refactor toward building an abstraction over managing git
repositories.
Afterwards, it does not matter anymore if they are stored on the local
disk or somewhere remote.
## What this PR changes
We used `git.OpenRepository` everywhere previously.
Now, we should split them into two distinct functions:
Firstly, there are temporary repositories which do not change:
```go
git.OpenRepository(ctx, diskPath)
```
Gitea managed repositories having a record in the database in the
`repository` table are moved into the new package `gitrepo`:
```go
gitrepo.OpenRepository(ctx, repo_model.Repo)
```
Why is `repo_model.Repository` the second parameter instead of file
path?
Because then we can easily adapt our repository storage strategy.
The repositories can be stored locally, however, they could just as well
be stored on a remote server.
## Further changes in other PRs
- A Git Command wrapper on package `gitrepo` could be created. i.e.
`NewCommand(ctx, repo_model.Repository, commands...)`. `git.RunOpts{Dir:
repo.RepoPath()}`, the directory should be empty before invoking this
method and it can be filled in the function only. #28940
- Remove the `RepoPath()`/`WikiPath()` functions to reduce the
possibility of mistakes.
---------
Co-authored-by: delvh <dev.lh@web.de>
Fixes#28699
This PR implements the `MigrateRepository` method for `actionsNotifier`
to detect the schedules from the workflow files in the migrated
repository.
The method can't be called with an outer transaction because if the user
is not a collaborator the outer transaction will be rolled back even if
the inner transaction uses the no-error path.
`has == 0` leads to `return nil` which cancels the transaction. A
standalone call of this method does nothing but if used with an outer
transaction, that will be canceled.
Sometimes you need to work on a feature which depends on another (unmerged) feature.
In this case, you may create a PR based on that feature instead of the main branch.
Currently, such PRs will be closed without the possibility to reopen in case the parent feature is merged and its branch is deleted.
Automatic target branch change make life a lot easier in such cases.
Github and Bitbucket behave in such way.
Example:
$PR_1$: main <- feature1
$PR_2$: feature1 <- feature2
Currently, merging $PR_1$ and deleting its branch leads to $PR_2$ being closed without the possibility to reopen.
This is both annoying and loses the review history when you open a new PR.
With this change, $PR_2$ will change its target branch to main ($PR_2$: main <- feature2) after $PR_1$ has been merged and its branch has been deleted.
This behavior is enabled by default but can be disabled.
For security reasons, this target branch change will not be executed when merging PRs targeting another repo.
Fixes#27062Fixes#18408
---------
Co-authored-by: Denys Konovalov <kontakt@denyskon.de>
Co-authored-by: delvh <dev.lh@web.de>
Fixes#22236
---
Error occurring currently while trying to revert commit using read-tree
-m approach:
> 2022/12/26 16:04:43 ...rvices/pull/patch.go:240:AttemptThreeWayMerge()
[E] [63a9c61a] Unable to run read-tree -m! Error: exit status 128 -
fatal: this operation must be run in a work tree
> - fatal: this operation must be run in a work tree
We need to clone a non-bare repository for `git read-tree -m` to work.
bb371aee6e
adds support to create a non-bare cloned temporary upload repository.
After cloning a non-bare temporary upload repository, we [set default
index](https://github.com/go-gitea/gitea/blob/main/services/repository/files/cherry_pick.go#L37)
(`git read-tree HEAD`).
This operation ends up resetting the git index file (see investigation
details below), due to which, we need to call `git update-index
--refresh` afterward.
Here's the diff of the index file before and after we execute
SetDefaultIndex: https://www.diffchecker.com/hyOP3eJy/
Notice the **ctime**, **mtime** are set to 0 after SetDefaultIndex.
You can reproduce the same behavior using these steps:
```bash
$ git clone https://try.gitea.io/me-heer/test.git -s -b main
$ cd test
$ git read-tree HEAD
$ git read-tree -m 1f085d7ed8 1f085d7ed8 9933caed00
error: Entry '1' not uptodate. Cannot merge.
```
After which, we can fix like this:
```
$ git update-index --refresh
$ git read-tree -m 1f085d7ed8 1f085d7ed8 9933caed00
```
As more and more options can be set for creating the repository, I don't
think we should put all of them into the creation web page which will
make things look complicated and confusing.
And I think we need some rules about how to decide which should/should
not be put in creating a repository page. One rule I can imagine is if
this option can be changed later and it's not a MUST on the creation,
then it can be removed on the page. So I found trust model is the first
one.
This PR removed the trust model selections on creating a repository web
page and kept others as before.
This is also a preparation for #23894 which will add a choice about SHA1
or SHA256 that cannot be changed once the repository created.
Fixes#26548
This PR refactors the rendering of markup links. The old code uses
`strings.Replace` to change some urls while the new code uses more
context to decide which link should be generated.
The added tests should ensure the same output for the old and new
behaviour (besides the bug).
We may need to refactor the rendering a bit more to make it clear how
the different helper methods render the input string. There are lots of
options (resolve links / images / mentions / git hashes / emojis / ...)
but you don't really know what helper uses which options. For example,
we currently support images in the user description which should not be
allowed I think:
<details>
<summary>Profile</summary>
https://try.gitea.io/KN4CK3R
</details>
---------
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Fixes#27114.
* In Gitea 1.12 (#9532), a "dismiss stale approvals" branch protection
setting was introduced, for ignoring stale reviews when verifying the
approval count of a pull request.
* In Gitea 1.14 (#12674), the "dismiss review" feature was added.
* This caused confusion with users (#25858), as "dismiss" now means 2
different things.
* In Gitea 1.20 (#25882), the behavior of the "dismiss stale approvals"
branch protection was modified to actually dismiss the stale review.
For some users this new behavior of dismissing the stale reviews is not
desirable.
So this PR reintroduces the old behavior as a new "ignore stale
approvals" branch protection setting.
---------
Co-authored-by: delvh <dev.lh@web.de>
Fix#28157
This PR fix the possible bugs about actions schedule.
## The Changes
- Move `UpdateRepositoryUnit` and `SetRepoDefaultBranch` from models to
service layer
- Remove schedules plan from database and cancel waiting & running
schedules tasks in this repository when actions unit has been disabled
or global disabled.
- Remove schedules plan from database and cancel waiting & running
schedules tasks in this repository when default branch changed.
- If there's a error with the Git command in `checkIfPRContentChanged`
the stderr wasn't concatendated to the error, which results in still not
knowing why an error happend.
- Adds concatenation for stderr to the returned error.
- Ref: https://codeberg.org/forgejo/forgejo/issues/2077
Co-authored-by: Gusted <postmaster@gusted.xyz>
I noticed the `BuildAllRepositoryFiles` function under the Alpine folder
is unused and I thought it was a bug.
But I'm not sure about this. Was it on purpose?
#28361 introduced `syncBranchToDB` in `CreateNewBranchFromCommit`. This
PR will revert the change because it's unnecessary. Every push will
already be checked by `syncBranchToDB`.
This PR also created a test to ensure it's right.
Introduce the new generic deletion methods
- `func DeleteByID[T any](ctx context.Context, id int64) (int64, error)`
- `func DeleteByIDs[T any](ctx context.Context, ids ...int64) error`
- `func Delete[T any](ctx context.Context, opts FindOptions) (int64,
error)`
So, we no longer need any specific deletion method and can just use
the generic ones instead.
Replacement of #28450Closes#28450
---------
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Using the Go Official tool `golang.org/x/tools/cmd/deadcode@latest`
mentioned by [go blog](https://go.dev/blog/deadcode).
Just use `deadcode .` in the project root folder and it gives a list of
unused functions. Though it has some false alarms.
This PR removes dead code detected in `models/issues`.
Nowadays, cache will be used on almost everywhere of Gitea and it cannot
be disabled, otherwise some features will become unaviable.
Then I think we can just remove the option for cache enable. That means
cache cannot be disabled.
But of course, we can still use cache configuration to set how should
Gitea use the cache.
The 4 functions are duplicated, especially as interface methods. I think
we just need to keep `MustID` the only one and remove other 3.
```
MustID(b []byte) ObjectID
MustIDFromString(s string) ObjectID
NewID(b []byte) (ObjectID, error)
NewIDFromString(s string) (ObjectID, error)
```
Introduced the new interfrace method `ComputeHash` which will replace
the interface `HasherInterface`. Now we don't need to keep two
interfaces.
Reintroduced `git.NewIDFromString` and `git.MustIDFromString`. The new
function will detect the hash length to decide which objectformat of it.
If it's 40, then it's SHA1. If it's 64, then it's SHA256. This will be
right if the commitID is a full one. So the parameter should be always a
full commit id.
@AdamMajer Please review.
Update golang.org/x/crypto for CVE-2023-48795 and update other packages.
`go-git` is not updated because it needs time to figure out why some
tests fail.
- Remove `ObjectFormatID`
- Remove function `ObjectFormatFromID`.
- Use `Sha1ObjectFormat` directly but not a pointer because it's an
empty struct.
- Store `ObjectFormatName` in `repository` struct
Refactor Hash interfaces and centralize hash function. This will allow
easier introduction of different hash function later on.
This forms the "no-op" part of the SHA256 enablement patch.
## Changes
- Add deprecation warning to `Token` and `AccessToken` authentication
methods in swagger.
- Add deprecation warning header to API response. Example:
```
HTTP/1.1 200 OK
...
Warning: token and access_token API authentication is deprecated
...
```
- Add setting `DISABLE_QUERY_AUTH_TOKEN` to reject query string auth
tokens entirely. Default is `false`
## Next steps
- `DISABLE_QUERY_AUTH_TOKEN` should be true in a subsequent release and
the methods should be removed in swagger
- `DISABLE_QUERY_AUTH_TOKEN` should be removed and the implementation of
the auth methods in question should be removed
## Open questions
- Should there be further changes to the swagger documentation?
Deprecation is not yet supported for security definitions (coming in
[OpenAPI Spec version
3.2.0](https://github.com/OAI/OpenAPI-Specification/issues/2506))
- Should the API router logger sanitize urls that use `token` or
`access_token`? (This is obviously an insufficient solution on its own)
---------
Co-authored-by: delvh <dev.lh@web.de>
- Currently there's code to recover gracefully from panics that happen
within the execution of cron tasks. However this recover code wasn't
being run, because `RunWithShutdownContext` also contains code to
recover from any panic and then gracefully shutdown Forgejo. Because
`RunWithShutdownContext` registers that code as last, that would get run
first which in this case is not behavior that we want.
- Move the recover code to inside the function, so that is run first
before `RunWithShutdownContext`'s recover code (which is now a noop).
Fixes: https://codeberg.org/forgejo/forgejo/issues/1910
Co-authored-by: Gusted <postmaster@gusted.xyz>
Fix#28056
This PR will check whether the repo has zero branch when pushing a
branch. If that, it means this repository hasn't been synced.
The reason caused that is after user upgrade from v1.20 -> v1.21, he
just push branches without visit the repository user interface. Because
all repositories routers will check whether a branches sync is necessary
but push has not such check.
For every repository, it has two states, synced or not synced. If there
is zero branch for a repository, then it will be assumed as non-sync
state. Otherwise, it's synced state. So if we think it's synced, we just
need to update branch/insert new branch. Otherwise do a full sync. So
that, for every push, there will be almost no extra load added. It's
high performance than yours.
For the implementation, we in fact will try to update the branch first,
if updated success with affect records > 0, then all are done. Because
that means the branch has been in the database. If no record is
affected, that means the branch does not exist in database. So there are
two possibilities. One is this is a new branch, then we just need to
insert the record. Another is the branches haven't been synced, then we
need to sync all the branches into database.
The function `GetByBean` has an obvious defect that when the fields are
empty values, it will be ignored. Then users will get a wrong result
which is possibly used to make a security problem.
To avoid the possibility, this PR removed function `GetByBean` and all
references.
And some new generic functions have been introduced to be used.
The recommand usage like below.
```go
// if query an object according id
obj, err := db.GetByID[Object](ctx, id)
// query with other conditions
obj, err := db.Get[Object](ctx, builder.Eq{"a": a, "b":b})
```
- Push commits updates are run in a queue and updates can come from less
traceable places such as Git over SSH, therefor add more information
about on which repository the pushUpdate failed.
Refs: https://codeberg.org/forgejo/forgejo/pulls/1723
(cherry picked from commit 37ab9460394800678d2208fed718e719d7a5d96f)
Co-authored-by: Gusted <postmaster@gusted.xyz>
- Say to the binding middleware which locale should be used for the
required error.
- Resolves https://codeberg.org/forgejo/forgejo/issues/1683
(cherry picked from commit 5a2d7966127b5639332038e9925d858ab54fc360)
Co-authored-by: Gusted <postmaster@gusted.xyz>
Changed behavior to calculate package quota limit using package `creator
ID` instead of `owner ID`.
Currently, users are allowed to create an unlimited number of
organizations, each of which has its own package limit quota, resulting
in the ability for users to have unlimited package space in different
organization scopes. This fix will calculate package quota based on
`package version creator ID` instead of `package version owner ID`
(which might be organization), so that users are not allowed to take
more space than configured package settings.
Also, there is a side case in which users can publish packages to a
specific package version, initially published by different user, taking
that user package size quota. Version in fix should be better because
the total amount of space is limited to the quota for users sharing the
same organization scope.
Fixes https://codeberg.org/forgejo/forgejo/issues/1458
Some mails such as issue creation mails are missing the reply-to-comment
address. This PR fixes that and specifies which comment types should get
a reply-possibility.
Fixes#27819
We have support for two factor logins with the normal web login and with
basic auth. For basic auth the two factor check was implemented at three
different places and you need to know that this check is necessary. This
PR moves the check into the basic auth itself.
- On user deletion, delete action runners that the user has created.
- Add a database consistency check to remove action runners that have
nonexistent belonging owner.
- Resolves https://codeberg.org/forgejo/forgejo/issues/1720
(cherry picked from commit 009ca7223dab054f7f760b7ccae69e745eebfabb)
Co-authored-by: Gusted <postmaster@gusted.xyz>
The steps to reproduce it.
First, create a new oauth2 source.
Then, a user login with this oauth2 source.
Disable the oauth2 source.
Visit users -> settings -> security, 500 will be displayed.
This is because this page only load active Oauth2 sources but not all
Oauth2 sources.
After many refactoring PRs for the "locale" and "template context
function", now the ".locale" is not needed for web templates any more.
This PR does a clean up for:
1. Remove `ctx.Data["locale"]` for web context.
2. Use `ctx.Locale` in `500.tmpl`, for consistency.
3. Add a test check for `500 page` locale usage.
4. Remove the `Str2html` and `DotEscape` from mail template context
data, they are copy&paste errors introduced by #19169 and #16200 . These
functions are template functions (provided by the common renderer), but
not template data variables.
5. Make email `SendAsync` function mockable (I was planning to add more
tests but it would make this PR much too complex, so the tests could be
done in another PR)
Due to a bug in the GitLab API, the diff_refs field is populated in the
response when fetching an individual merge request, but not when
fetching a list of them. That field is used to populate the merge base
commit SHA.
While there is detection for the merge base even when not populated by
the downloader, that detection is not flawless. Specifically, when a
GitLab merge request has a single commit, and gets merged with the
squash strategy, the base branch will be fast-forwarded instead of a
separate squash or merge commit being created. The merge base detection
attempts to find the last commit on the base branch that is also on the
PR branch, but in the fast-forward case that is the PR's only commit.
Assuming the head commit is also the merge base results in the import of
a PR with 0 commits and no diff.
This PR uses the individual merge request endpoint to fetch merge
request data with the diff_refs field. With its data, the base merge
commit can be properly set, which—by not relying on the detection
mentioned above—correctly imports PRs that were "merged" by
fast-forwarding the base branch.
ref: https://gitlab.com/gitlab-org/gitlab/-/issues/29620
Before this PR, the PR migration code populates Gitea's MergedCommitID
field by using GitLab's merge_commit_sha field. However, that field is
only populated when the PR was merged using a merge strategy. When a
squash strategy is used, squash_commit_sha is populated instead.
Given that Gitea does not keep track of merge and squash commits
separately, this PR simply populates Gitea's MergedCommitID by using
whichever field is present in the GitLab API response.
