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	Support changing git config through app.ini, use diff.algorithm=histogram by default (#24860)
				
					
				
			Close #13454 , Close #23255, Close #14697 (and maybe more related issues) Many users have the requirement to customize the git config. This PR introduces an easy way: put the options in Gitea's app.ini `[git.config]`, then the config options will be applied to git config. And it can support more flexible default config values, eg: now `diff.algorithm=histogram` by default. According to: https://stackoverflow.com/a/32367597/4754037 , `histogram diff` is efficient and doesn't like to cause server-side problems. --------- Co-authored-by: silverwind <me@silverwind.io> Co-authored-by: KN4CK3R <admin@oldschoolhack.me> Co-authored-by: Giteabot <teabot@gitea.io>
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		@@ -1054,12 +1054,7 @@ Default templates for project boards:
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- `DISABLE_CORE_PROTECT_NTFS`: **false** Set to true to forcibly set `core.protectNTFS` to false.
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- `DISABLE_PARTIAL_CLONE`: **false** Disable the usage of using partial clones for git.
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## Git - Reflog settings (`git.reflog`)
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- `ENABLED`: **true** Set to true to enable Git to write changes to reflogs in each repo.
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- `EXPIRATION`: **90** Reflog entry lifetime, in days. Entries are removed opportunistically by Git.
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## Git - Timeout settings (`git.timeout`)
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### Git - Timeout settings (`git.timeout`)
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- `DEFAULT`: **360**: Git operations default timeout seconds.
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- `MIGRATE`: **600**: Migrate external repositories timeout seconds.
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@@ -1068,6 +1063,18 @@ Default templates for project boards:
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- `PULL`: **300**: Git pull from internal repositories timeout seconds.
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- `GC`: **60**: Git repository GC timeout seconds.
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### Git - Reflog settings (`git.reflog`)
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- `ENABLED`: **true** Set to true to enable Git to write changes to reflogs in each repo.
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- `EXPIRATION`: **90** Reflog entry lifetime, in days. Entries are removed opportunistically by Git.
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### Git - Config options (`git.config`)
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The key/value pairs in this section will be used as git config.
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This section only does "set" config, a removed config key from this section won't be removed from git config automatically. The format is `some.configKey = value`.
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- `diff.algorithm`: **histogram**
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## Metrics (`metrics`)
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- `ENABLED`: **false**: Enables /metrics endpoint for prometheus.
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@@ -282,6 +282,22 @@ Place custom files in corresponding sub-folder under `custom/options`.
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To add custom .gitignore, add a file with existing [.gitignore rules](https://git-scm.com/docs/gitignore) in it to `$GITEA_CUSTOM/options/gitignore`
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## Customizing the git configuration
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Starting with Gitea 1.20, you can customize the git configuration via the `git.config` section.
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### Enabling signed git pushes
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To enable signed git pushes, set these two options:
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```ini
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[git.config]
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receive.advertisePushOptions = true
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receive.certNonceSeed = <randomstring>
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```
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`certNonceSeed` should be set to a random string and be kept secret.
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### Labels
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Starting with Gitea 1.19, you can add a file that follows the [YAML label format](https://github.com/go-gitea/gitea/blob/main/options/label/Advanced.yaml) to `$GITEA_CUSTOM/options/label`:
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