Add a Files stanza to the FPM config

This allows for extra files to be passed into FPM packages.

config/config.go

@@ -118,6 +118,7 @@ type FPM struct {
 	Maintainer   string            `yaml:",omitempty"`
 	Description  string            `yaml:",omitempty"`
 	License      string            `yaml:",omitempty"`
+	Files        map[string]string `yaml:",omitempty"`
 
 	// Capture all undefined fields and should be empty after loading
 	XXX map[string]interface{} `yaml:",inline"`

pipeline/fpm/fpm.go

@@ -112,6 +112,17 @@ func create(ctx *context.Context, format, folder, arch string, binaries []contex
 		))
 	}
 
+	for src, dest := range ctx.Config.FPM.Files {
+		log.WithField("src", src).
+			WithField("dest", dest).
+			Info("passed extra file to fpm")
+		options = append(options, fmt.Sprintf(
+			"%s=%s",
+			src,
+			dest,
+		))
+	}
+
 	if out, err := exec.Command("fpm", options...).CombinedOutput(); err != nil {
 		return errors.New(string(out))
 	}

pipeline/fpm/fpm_test.go

@@ -99,9 +99,24 @@ func TestCreateFileDoesntExist(t *testing.T) {
 			Dist: dist,
 			FPM: config.FPM{
 				Formats: []string{"deb"},
+				Files: map[string]string{
+					"testdata/testfile.txt": "/var/lib/test/testfile.txt",
+				},
 			},
 		},
 	}
 	ctx.AddBinary("linuxamd64", "mybin", "mybin", filepath.Join(dist, "mybin", "mybin"))
 	assert.Error(Pipe{}.Run(ctx))
 }
+
+func TestRunPipeWithExtraFiles(t *testing.T) {
+	var assert = assert.New(t)
+	var ctx = &context.Context{
+		Config: config.Project{
+			FPM: config.FPM{
+				Formats: []string{"deb"},
+			},
+		},
+	}
+	assert.NoError(Pipe{}.Run(ctx))
+}

pipeline/fpm/testdata/testfile.txt

@@ -0,0 +1 @@
+this is a test file