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forgejo/routers/init.go
wxiaoguang 061b68e995
Refactor path & config system (#25330) (#25416) 
Backport #25330

# The problem

There were many "path tricks":

* By default, Gitea uses its program directory as its work path
* Gitea tries to use the "work path" to guess its "custom path" and
"custom conf (app.ini)"
* Users might want to use other directories as work path
* The non-default work path should be passed to Gitea by GITEA_WORK_DIR
or "--work-path"
* But some Gitea processes are started without these values
    * The "serv" process started by OpenSSH server
    * The CLI sub-commands started by site admin
* The paths are guessed by SetCustomPathAndConf again and again
* The default values of "work path / custom path / custom conf" can be
changed when compiling

# The solution

* Use `InitWorkPathAndCommonConfig` to handle these path tricks, and use
test code to cover its behaviors.
* When Gitea's web server runs, write the WORK_PATH to "app.ini", this
value must be the most correct one, because if this value is not right,
users would find that the web UI doesn't work and then they should be
able to fix it.
* Then all other sub-commands can use the WORK_PATH in app.ini to
initialize their paths.
* By the way, when Gitea starts for git protocol, it shouldn't output
any log, otherwise the git protocol gets broken and client blocks
forever.

The "work path" priority is: WORK_PATH in app.ini > cmd arg --work-path
> env var GITEA_WORK_DIR > builtin default

The "app.ini" searching order is: cmd arg --config > cmd arg "work path
/ custom path" > env var "work path / custom path" > builtin default


## ⚠️ BREAKING

If your instance's "work path / custom path / custom conf" doesn't meet
the requirements (eg: work path must be absolute), Gitea will report a
fatal error and exit. You need to set these values according to the
error log.
2023-06-22 16:27:18 +00:00

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// Copyright 2016 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package routers
import (
"context"
"reflect"
"runtime"
"code.gitea.io/gitea/models"
asymkey_model "code.gitea.io/gitea/models/asymkey"
"code.gitea.io/gitea/modules/cache"
"code.gitea.io/gitea/modules/eventsource"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/highlight"
code_indexer "code.gitea.io/gitea/modules/indexer/code"
issue_indexer "code.gitea.io/gitea/modules/indexer/issues"
stats_indexer "code.gitea.io/gitea/modules/indexer/stats"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/markup"
"code.gitea.io/gitea/modules/markup/external"
"code.gitea.io/gitea/modules/notification"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/ssh"
"code.gitea.io/gitea/modules/storage"
"code.gitea.io/gitea/modules/svg"
"code.gitea.io/gitea/modules/system"
"code.gitea.io/gitea/modules/templates"
"code.gitea.io/gitea/modules/translation"
"code.gitea.io/gitea/modules/web"
actions_router "code.gitea.io/gitea/routers/api/actions"
packages_router "code.gitea.io/gitea/routers/api/packages"
apiv1 "code.gitea.io/gitea/routers/api/v1"
"code.gitea.io/gitea/routers/common"
"code.gitea.io/gitea/routers/private"
web_routers "code.gitea.io/gitea/routers/web"
actions_service "code.gitea.io/gitea/services/actions"
"code.gitea.io/gitea/services/auth"
"code.gitea.io/gitea/services/auth/source/oauth2"
"code.gitea.io/gitea/services/automerge"
"code.gitea.io/gitea/services/cron"
"code.gitea.io/gitea/services/mailer"
mailer_incoming "code.gitea.io/gitea/services/mailer/incoming"
markup_service "code.gitea.io/gitea/services/markup"
repo_migrations "code.gitea.io/gitea/services/migrations"
mirror_service "code.gitea.io/gitea/services/mirror"
pull_service "code.gitea.io/gitea/services/pull"
repo_service "code.gitea.io/gitea/services/repository"
"code.gitea.io/gitea/services/repository/archiver"
"code.gitea.io/gitea/services/task"
"code.gitea.io/gitea/services/webhook"
)
func mustInit(fn func() error) {
err := fn()
if err != nil {
ptr := reflect.ValueOf(fn).Pointer()
fi := runtime.FuncForPC(ptr)
log.Fatal("%s failed: %v", fi.Name(), err)
}
}
func mustInitCtx(ctx context.Context, fn func(ctx context.Context) error) {
err := fn(ctx)
if err != nil {
ptr := reflect.ValueOf(fn).Pointer()
fi := runtime.FuncForPC(ptr)
log.Fatal("%s(ctx) failed: %v", fi.Name(), err)
}
}
func syncAppConfForGit(ctx context.Context) error {
runtimeState := new(system.RuntimeState)
if err := system.AppState.Get(runtimeState); err != nil {
return err
}
updated := false
if runtimeState.LastAppPath != setting.AppPath {
log.Info("AppPath changed from '%s' to '%s'", runtimeState.LastAppPath, setting.AppPath)
runtimeState.LastAppPath = setting.AppPath
updated = true
}
if runtimeState.LastCustomConf != setting.CustomConf {
log.Info("CustomConf changed from '%s' to '%s'", runtimeState.LastCustomConf, setting.CustomConf)
runtimeState.LastCustomConf = setting.CustomConf
updated = true
}
if updated {
log.Info("re-sync repository hooks ...")
mustInitCtx(ctx, repo_service.SyncRepositoryHooks)
log.Info("re-write ssh public keys ...")
mustInit(asymkey_model.RewriteAllPublicKeys)
return system.AppState.Set(runtimeState)
}
return nil
}
func InitWebInstallPage(ctx context.Context) {
translation.InitLocales(ctx)
setting.LoadSettingsForInstall()
mustInit(svg.Init)
}
// InitWebInstalled is for global installed configuration.
func InitWebInstalled(ctx context.Context) {
mustInitCtx(ctx, git.InitFull)
log.Info("Git version: %s (home: %s)", git.VersionInfo(), git.HomeDir())
// Setup i18n
translation.InitLocales(ctx)
setting.LoadSettings()
mustInit(storage.Init)
mailer.NewContext(ctx)
mustInit(cache.NewContext)
notification.NewContext()
mustInit(archiver.Init)
highlight.NewContext()
external.RegisterRenderers()
markup.Init(markup_service.ProcessorHelper())
if setting.EnableSQLite3 {
log.Info("SQLite3 support is enabled")
} else if setting.Database.Type.IsSQLite3() {
log.Fatal("SQLite3 support is disabled, but it is used for database setting. Please get or build a Gitea release with SQLite3 support.")
}
mustInitCtx(ctx, common.InitDBEngine)
log.Info("ORM engine initialization successful!")
mustInit(system.Init)
mustInit(oauth2.Init)
mustInitCtx(ctx, models.Init)
mustInit(repo_service.Init)
// Booting long running goroutines.
issue_indexer.InitIssueIndexer(false)
code_indexer.Init()
mustInit(stats_indexer.Init)
mirror_service.InitSyncMirrors()
mustInit(webhook.Init)
mustInit(pull_service.Init)
mustInit(automerge.Init)
mustInit(task.Init)
mustInit(repo_migrations.Init)
eventsource.GetManager().Init()
mustInitCtx(ctx, mailer_incoming.Init)
mustInitCtx(ctx, syncAppConfForGit)
mustInit(ssh.Init)
auth.Init()
mustInit(svg.Init)
actions_service.Init()
// Finally start up the cron
cron.NewContext(ctx)
}
// NormalRoutes represents non install routes
func NormalRoutes(ctx context.Context) *web.Route {
_ = templates.HTMLRenderer()
r := web.NewRoute()
r.Use(common.ProtocolMiddlewares()...)
r.Mount("/", web_routers.Routes(ctx))
r.Mount("/api/v1", apiv1.Routes(ctx))
r.Mount("/api/internal", private.Routes())
if setting.Packages.Enabled {
// This implements package support for most package managers
r.Mount("/api/packages", packages_router.CommonRoutes(ctx))
// This implements the OCI API (Note this is not preceded by /api but is instead /v2)
r.Mount("/v2", packages_router.ContainerRoutes(ctx))
}
if setting.Actions.Enabled {
prefix := "/api/actions"
r.Mount(prefix, actions_router.Routes(ctx, prefix))
// TODO: Pipeline api used for runner internal communication with gitea server. but only artifact is used for now.
// In Github, it uses ACTIONS_RUNTIME_URL=https://pipelines.actions.githubusercontent.com/fLgcSHkPGySXeIFrg8W8OBSfeg3b5Fls1A1CwX566g8PayEGlg/
// TODO: this prefix should be generated with a token string with runner ?
prefix = "/api/actions_pipeline"
r.Mount(prefix, actions_router.ArtifactsRoutes(prefix))
}
return r
}
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