feat: set array

Fixes #148

README.md

@@ -70,9 +70,14 @@ releases:
           domain: {{ requiredEnv "PLATFORM_ID" }}.my-domain.com
           scheme: {{ env "SCHEME" | default "https" }}
     set:
-    # single value load from a local file, --set-file foo.config=path/to/file
+    # single value loaded from a local file, translates to --set-file foo.config=path/to/file
     - name: foo.config
       file: path/to/file
+    # set a single array value in an array, translates to --set bar[0]={1,2}
+    - name: bar[0]
+      values:
+      - 1
+      - 2
     # will attempt to decrypt it using helm-secrets plugin
     secrets:
       - vault_secret.yaml

state/state.go

@@ -79,9 +79,10 @@ type ReleaseSpec struct {
 
 // SetValue are the key values to set on a helm release
 type SetValue struct {
-	Name  string `yaml:"name"`
-	Value string `yaml:"value"`
-	File  string `yaml:"file"`
+	Name   string   `yaml:"name"`
+	Value  string   `yaml:"value"`
+	File   string   `yaml:"file"`
+	Values []string `yaml:"values"`
 }
 
 // CreateFromTemplateFile loads the helmfile from disk and processes the template
@@ -753,6 +754,13 @@ func (state *HelmState) namespaceAndValuesFlags(helm helmexec.Interface, basePat
 				flags = append(flags, "--set", fmt.Sprintf("%s=%s", escape(set.Name), escape(set.Value)))
 			} else if set.File != "" {
 				flags = append(flags, "--set-file", fmt.Sprintf("%s=%s", escape(set.Name), set.File))
+			} else if len(set.Values) > 0 {
+				items := make([]string, len(set.Values))
+				for i, raw := range set.Values {
+					items[i] = escape(raw)
+				}
+				v := strings.Join(items, ",")
+				flags = append(flags, "--set", fmt.Sprintf("%s={%s}", escape(set.Name), v))
 			}
 		}
 	}

state/state_test.go

@@ -708,6 +708,26 @@ func TestHelmState_SyncReleases(t *testing.T) {
 			helm:         &mockHelmExec{},
 			wantReleases: []mockRelease{{"releaseName", []string{"--set", "foo=FOO", "--set-file", "bar=path/to/bar", "--set", "baz=BAZ"}}},
 		},
+		{
+			name: "set single array value in an array",
+			releases: []ReleaseSpec{
+				{
+					Name:  "releaseName",
+					Chart: "foo",
+					SetValues: []SetValue{
+						{
+							Name: "foo.bar[0]",
+							Values: []string{
+								"A",
+								"B",
+							},
+						},
+					},
+				},
+			},
+			helm:         &mockHelmExec{},
+			wantReleases: []mockRelease{{"releaseName", []string{"--set", "foo.bar[0]={A,B}"}}},
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {