revert: tea 1.0 rewrite (#1122–#1126) (#1146)

Reverts #1126, #1125, #1124, #1123 and #1122. `go.mod` keeps the Go 1.26 line with toolchain `go1.26.9` (instead of the original `go1.26.6`) so the security fix from #1131 isn't lost. reopens #69 reopens #141 reopens #162 reopens #172 reopens #197 reopens #232 reopens #240 reopens #246 reopens #323 reopens #325 reopens #326 reopens #328 reopens #344 reopens #351 reopens #373 reopens #403 reopens #406 reopens #417 reopens #430 reopens #457 reopens #480 reopens #482 reopens #489 reopens #490 reopens #498 reopens #500 reopens #504 reopens #510 reopens #516 reopens #523 reopens #556 reopens #560 reopens #569 reopens #571 reopens #602 reopens #632 reopens #633 reopens #643 reopens #666 reopens #670 reopens #672 reopens #677 reopens #683 reopens #697 reopens #726 reopens #737 reopens #770 reopens #779 reopens #804 reopens #817 reopens #831 reopens #833 reopens #834 reopens #908 reopens #966 reopens #1023 reopens #1029 reopens #1032 reopens #1050 reopens #1052 reopens #1069 reopens #1073 reopens #1087 reopens #1091 reopens #1094 reopens #1110 reopens #1115 reopens #1116 reopens #1118 Reviewed-on: https://gitea.com/gitea/tea/pulls/1146 Reviewed-by: TheFox0x7 <95654+thefox0x7@noreply.gitea.com>
2026-10-26 11:01:25 +01:00 · 2026-10-18 20:56:33 +00:00
1 parent 33bb12729e
commit c5f674111a
@@ -0,0 +1,103 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package git
+
+import (
+	"fmt"
+	"sort"
+	"sync"
+)
+
+var backendRegistry = struct {
+	sync.RWMutex
+	current  string
+	backends map[string]Backend
+}{
+	backends: make(map[string]Backend),
+}
+
+func init() {
+	mustRegisterBackend(cliBackend{})
+	mustUseBackend("cli")
+}
+
+// RegisterBackend makes a git backend available for later switching.
+func RegisterBackend(backend Backend) error {
+	if backend == nil {
+		return fmt.Errorf("git backend is nil")
+	}
+	name := backend.Name()
+	if name == "" {
+		return fmt.Errorf("git backend name is empty")
+	}
+
+	backendRegistry.Lock()
+	defer backendRegistry.Unlock()
+	backendRegistry.backends[name] = backend
+	if backendRegistry.current == "" {
+		backendRegistry.current = name
+	}
+	return nil
+}
+
+func mustRegisterBackend(backend Backend) {
+	if err := RegisterBackend(backend); err != nil {
+		panic(err)
+	}
+}
+
+// UseBackend switches the active git backend implementation.
+func UseBackend(name string) error {
+	backendRegistry.Lock()
+	defer backendRegistry.Unlock()
+	if _, ok := backendRegistry.backends[name]; !ok {
+		return fmt.Errorf("git backend %q is not registered", name)
+	}
+	backendRegistry.current = name
+	return nil
+}
+
+func mustUseBackend(name string) {
+	if err := UseBackend(name); err != nil {
+		panic(err)
+	}
+}
+
+// CurrentBackendName returns the active backend name.
+func CurrentBackendName() string {
+	backendRegistry.RLock()
+	defer backendRegistry.RUnlock()
+	return backendRegistry.current
+}
+
+// RegisteredBackends returns all registered backend names.
+func RegisteredBackends() []string {
+	backendRegistry.RLock()
+	defer backendRegistry.RUnlock()
+	out := make([]string, 0, len(backendRegistry.backends))
+	for name := range backendRegistry.backends {
+		out = append(out, name)
+	}
+	sort.Strings(out)
+	return out
+}
+
+func currentBackend() Backend {
+	backendRegistry.RLock()
+	defer backendRegistry.RUnlock()
+	return backendRegistry.backends[backendRegistry.current]
+}
+
+func setBackendForTesting(t testingT, backend Backend) {
+	t.Helper()
+	prev := CurrentBackendName()
+	mustRegisterBackend(backend)
+	mustUseBackend(backend.Name())
+	t.Cleanup(func() { mustUseBackend(prev) })
+}
+
+type testingT interface {
+	Cleanup(func())
+	Helper()
+}