From 8cd325eb5a8536708c50bd90dfca2a81cd9bad4c Mon Sep 17 00:00:00 2001
From: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>
Date: Fri, 29 Mar 2024 10:27:33 -0300
Subject: [PATCH] fix: support dir in gomod (#4729)

closes https://github.com/orgs/goreleaser/discussions/4728
---
 internal/pipe/gomod/gomod.go                |  3 +++
 internal/pipe/gomod/gomod_test.go           | 23 +++++++++++++++++++++
 pkg/config/config.go                        |  1 +
 www/docs/customization/verifiable_builds.md |  8 ++++++-
 4 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/internal/pipe/gomod/gomod.go b/internal/pipe/gomod/gomod.go
index 4fb99bfb9..dbbae8a80 100644
--- a/internal/pipe/gomod/gomod.go
+++ b/internal/pipe/gomod/gomod.go
@@ -36,6 +36,9 @@ func (Pipe) Run(ctx *context.Context) error {
 	}
 	cmd := exec.CommandContext(ctx, ctx.Config.GoMod.GoBinary, flags...)
 	cmd.Env = append(ctx.Env.Strings(), ctx.Config.GoMod.Env...)
+	if dir := ctx.Config.GoMod.Dir; dir != "" {
+		cmd.Dir = dir
+	}
 	out, err := cmd.CombinedOutput()
 	result := strings.TrimSpace(string(out))
 	if strings.HasPrefix(result, goPreModulesError) {
diff --git a/internal/pipe/gomod/gomod_test.go b/internal/pipe/gomod/gomod_test.go
index 5587530bc..c43973a73 100644
--- a/internal/pipe/gomod/gomod_test.go
+++ b/internal/pipe/gomod/gomod_test.go
@@ -75,6 +75,29 @@ func TestCustomEnv(t *testing.T) {
 	require.NoError(t, Pipe{}.Run(ctx))
 }
 
+func TestRunCustomDir(t *testing.T) {
+	dir := testlib.Mktmp(t)
+	require.NoError(t, os.MkdirAll(filepath.Join(dir, "src"), 0o755))
+	require.NoError(t, os.WriteFile(
+		filepath.Join(dir, "src/main.go"),
+		[]byte("package main\nfunc main() {println(0)}"),
+		0o666,
+	))
+	require.NoError(t, os.WriteFile(
+		filepath.Join(dir, "src/go.mod"),
+		[]byte("module foo"),
+		0o666,
+	))
+	ctx := testctx.NewWithCfg(config.Project{
+		GoMod: config.GoMod{
+			Dir: filepath.Join(dir, "src"),
+		},
+	})
+	require.NoError(t, Pipe{}.Default(ctx))
+	require.NoError(t, Pipe{}.Run(ctx))
+	require.Equal(t, "foo", ctx.ModulePath)
+}
+
 func TestRunOutsideGoModule(t *testing.T) {
 	dir := testlib.Mktmp(t)
 	require.NoError(t, os.WriteFile(
diff --git a/pkg/config/config.go b/pkg/config/config.go
index b1c214334..06a7e0e96 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -1247,6 +1247,7 @@ type GoMod struct {
 	Env      []string `yaml:"env,omitempty" json:"env,omitempty"`
 	GoBinary string   `yaml:"gobinary,omitempty" json:"gobinary,omitempty"`
 	Mod      string   `yaml:"mod,omitempty" json:"mod,omitempty"`
+	Dir      string   `yaml:"dir,omitempty" json:"dir,omitempty"`
 }
 
 type Announce struct {
diff --git a/www/docs/customization/verifiable_builds.md b/www/docs/customization/verifiable_builds.md
index a2e7c9fc9..47d097a17 100644
--- a/www/docs/customization/verifiable_builds.md
+++ b/www/docs/customization/verifiable_builds.md
@@ -37,6 +37,12 @@ gomod:
   #
   # Default: `go`.
   gobinary: go1.17
+
+  # Directory in which the go.mod file is.
+  #
+  # Default: ''
+  # Since: v1.25
+  dir: ./src
 ```
 
 !!! tip
@@ -49,7 +55,7 @@ gomod:
     VCS Info will not be embedded in the binary, as in practice it is not being
     built from the source, but from the Go Mod Proxy.
 
-!!! warning 
+!!! warning
 
     If you have a `go.work` file, make sure to run `go work sync`, so the main
     module (`.`) is the first line inside the `use` block.