From a04fc567b454f1600c8f0f43a82da852bb075df3 Mon Sep 17 00:00:00 2001
From: parnic <github@parnic.com>
Date: Sat, 6 Aug 2022 21:37:48 -0500
Subject: [PATCH] Use request timeout for git service rpc (#20689) (#20693)

This enables git.Command's Run to optionally use the given context directly so its deadline will be respected. Otherwise, it falls back to the previous behavior of using the supplied timeout or a default timeout value of 360 seconds.

repo's serviceRPC() calls now use the context's deadline (which is unset/unlimited) instead of the default 6-minute timeout. This means that large repo clones will no longer arbitrarily time out on the upload-pack step, and pushes can take longer than 6 minutes on the receive-pack step.

Fixes #20680
---
 modules/git/command.go   | 25 +++++++++++++++++--------
 routers/web/repo/http.go | 11 ++++++-----
 2 files changed, 23 insertions(+), 13 deletions(-)

diff --git a/modules/git/command.go b/modules/git/command.go
index a1bacbb707..b24d32dbe8 100644
--- a/modules/git/command.go
+++ b/modules/git/command.go
@@ -95,14 +95,15 @@ func (c *Command) AddArguments(args ...string) *Command {
 	return c
 }
 
-// RunOpts represents parameters to run the command
+// RunOpts represents parameters to run the command. If UseContextTimeout is specified, then Timeout is ignored.
 type RunOpts struct {
-	Env            []string
-	Timeout        time.Duration
-	Dir            string
-	Stdout, Stderr io.Writer
-	Stdin          io.Reader
-	PipelineFunc   func(context.Context, context.CancelFunc) error
+	Env               []string
+	Timeout           time.Duration
+	UseContextTimeout bool
+	Dir               string
+	Stdout, Stderr    io.Writer
+	Stdin             io.Reader
+	PipelineFunc      func(context.Context, context.CancelFunc) error
 }
 
 func commonBaseEnvs() []string {
@@ -171,7 +172,15 @@ func (c *Command) Run(opts *RunOpts) error {
 		desc = fmt.Sprintf("%s %s [repo_path: %s]", c.name, strings.Join(args, " "), opts.Dir)
 	}
 
-	ctx, cancel, finished := process.GetManager().AddContextTimeout(c.parentContext, opts.Timeout, desc)
+	var ctx context.Context
+	var cancel context.CancelFunc
+	var finished context.CancelFunc
+
+	if opts.UseContextTimeout {
+		ctx, cancel, finished = process.GetManager().AddContext(c.parentContext, desc)
+	} else {
+		ctx, cancel, finished = process.GetManager().AddContextTimeout(c.parentContext, opts.Timeout, desc)
+	}
 	defer finished()
 
 	cmd := exec.CommandContext(ctx, c.name, c.args...)
diff --git a/routers/web/repo/http.go b/routers/web/repo/http.go
index 6a85bca16b..5aa2bcd134 100644
--- a/routers/web/repo/http.go
+++ b/routers/web/repo/http.go
@@ -474,11 +474,12 @@ func serviceRPC(ctx gocontext.Context, h serviceHandler, service string) {
 	cmd := git.NewCommand(h.r.Context(), service, "--stateless-rpc", h.dir)
 	cmd.SetDescription(fmt.Sprintf("%s %s %s [repo_path: %s]", git.GitExecutable, service, "--stateless-rpc", h.dir))
 	if err := cmd.Run(&git.RunOpts{
-		Dir:    h.dir,
-		Env:    append(os.Environ(), h.environ...),
-		Stdout: h.w,
-		Stdin:  reqBody,
-		Stderr: &stderr,
+		Dir:               h.dir,
+		Env:               append(os.Environ(), h.environ...),
+		Stdout:            h.w,
+		Stdin:             reqBody,
+		Stderr:            &stderr,
+		UseContextTimeout: true,
 	}); err != nil {
 		if err.Error() != "signal: killed" {
 			log.Error("Fail to serve RPC(%s) in %s: %v - %s", service, h.dir, err, stderr.String())