Move macaron to chi (#14293)

Use [chi](https://github.com/go-chi/chi) instead of the forked [macaron](https://gitea.com/macaron/macaron). Since macaron and chi have conflicts with session share, this big PR becomes a have-to thing. According my previous idea, we can replace macaron step by step but I'm wrong. :( Below is a list of big changes on this PR.

- [x] Define `context.ResponseWriter` interface with an implementation `context.Response`.
- [x] Use chi instead of macaron, and also a customize `Route` to wrap chi so that the router usage is similar as before.
- [x] Create different routers for `web`, `api`, `internal` and `install` so that the codes will be more clear and no magic .
- [x] Use https://github.com/unrolled/render instead of macaron's internal render
- [x] Use https://github.com/NYTimes/gziphandler instead of https://gitea.com/macaron/gzip
- [x] Use https://gitea.com/go-chi/session which is a modified version of https://gitea.com/macaron/session and removed `nodb` support since it will not be maintained. **BREAK**
- [x] Use https://gitea.com/go-chi/captcha which is a modified version of https://gitea.com/macaron/captcha
- [x] Use https://gitea.com/go-chi/cache which is a modified version of https://gitea.com/macaron/cache
- [x] Use https://gitea.com/go-chi/binding which is a modified version of https://gitea.com/macaron/binding
- [x] Use https://github.com/go-chi/cors instead of https://gitea.com/macaron/cors
- [x] Dropped https://gitea.com/macaron/i18n and make a new one in `code.gitea.io/gitea/modules/translation`
- [x] Move validation form structs from `code.gitea.io/gitea/modules/auth` to `code.gitea.io/gitea/modules/forms` to avoid dependency cycle.
- [x] Removed macaron log service because it's not need any more. **BREAK**
- [x] All form structs have to be get by `web.GetForm(ctx)` in the route function but not as a function parameter on routes definition.
- [x] Move Git HTTP protocol implementation to use routers directly.
- [x] Fix the problem that chi routes don't support trailing slash but macaron did.
- [x] `/api/v1/swagger` now will be redirect to `/api/swagger` but not render directly so that `APIContext` will not create a html render. 

Notices:
- Chi router don't support request with trailing slash
- Integration test `TestUserHeatmap` maybe mysql version related. It's failed on my macOS(mysql 5.7.29 installed via brew) but succeed on CI.

Co-authored-by: 6543 <6543@obermui.de>

3 files changed, 18 insertions, 9 deletions

diff --git a/modules/session/redis.go b/modules/session/redis.go
index c88ebd5769..55e7a85168 100644
--- a/modules/session/redis.go
+++ b/modules/session/redis.go
@@ -23,7 +23,7 @@ import (
 
 	"code.gitea.io/gitea/modules/nosql"
 
-	"gitea.com/macaron/session"
+	"gitea.com/go-chi/session"
 	"github.com/go-redis/redis/v7"
 )
 
diff --git a/modules/session/store.go b/modules/session/store.go
new file mode 100644
index 0000000000..529187d3be
--- /dev/null
+++ b/modules/session/store.go
@@ -0,0 +1,12 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package session
+
+// Store represents a session store
+type Store interface {
+	Get(interface{}) interface{}
+	Set(interface{}, interface{}) error
+	Delete(interface{}) error
+}
diff --git a/modules/session/virtual.go b/modules/session/virtual.go
index 1139cfe89c..3da499d71a 100644
--- a/modules/session/virtual.go
+++ b/modules/session/virtual.go
@@ -9,12 +9,11 @@ import (
 	"fmt"
 	"sync"
 
-	"gitea.com/macaron/session"
-	couchbase "gitea.com/macaron/session/couchbase"
-	memcache "gitea.com/macaron/session/memcache"
-	mysql "gitea.com/macaron/session/mysql"
-	nodb "gitea.com/macaron/session/nodb"
-	postgres "gitea.com/macaron/session/postgres"
+	"gitea.com/go-chi/session"
+	couchbase "gitea.com/go-chi/session/couchbase"
+	memcache "gitea.com/go-chi/session/memcache"
+	mysql "gitea.com/go-chi/session/mysql"
+	postgres "gitea.com/go-chi/session/postgres"
 )
 
 // VirtualSessionProvider represents a shadowed session provider implementation.
@@ -48,8 +47,6 @@ func (o *VirtualSessionProvider) Init(gclifetime int64, config string) error {
 		o.provider = &couchbase.CouchbaseProvider{}
 	case "memcache":
 		o.provider = &memcache.MemcacheProvider{}
-	case "nodb":
-		o.provider = &nodb.NodbProvider{}
 	default:
 		return fmt.Errorf("VirtualSessionProvider: Unknown Provider: %s", opts.Provider)
 	}