From 6804284cb3d68863f06b88ce99abed067453e50b Mon Sep 17 00:00:00 2001
From: David Mattia <8922077+dmattia@users.noreply.github.com>
Date: Mon, 25 Jan 2021 14:29:17 -0600
Subject: [PATCH] Allow ignoring dependency blocks (#106)

Co-authored-by: dmattia <david@transcend.io>
---
 README.md                                     |  1 +
 cmd/generate.go                               |  4 +++-
 cmd/generate_test.go                          |  9 +++++++++
 cmd/golden/terragrunt_dependency_ignored.yaml | 17 +++++++++++++++++
 4 files changed, 30 insertions(+), 1 deletion(-)
 create mode 100644 cmd/golden/terragrunt_dependency_ignored.yaml

diff --git a/README.md b/README.md
index 90073049..bb155c18 100644
--- a/README.md
+++ b/README.md
@@ -120,6 +120,7 @@ One way to customize the behavior of this module is through CLI flag values pass
 | `--output`                   | Path of the file where configuration will be generated. Typically, you want a file named "atlantis.yaml". Default is to write to `stdout`.                                      | ""                |
 | `--root`                     | Path to the root directory of the git repo you want to build config for.                                                                                                        | current directory |
 | `--terraform-version`        | Default terraform version to specify for all modules. Can be overriden by locals                                                                                                | ""                |
+| `--ignore-dependency-blocks` | When true, dependencies found in `dependency` and `dependencies` blocks will be ignored                                                                                         | false             |
 
 ## All Locals
 
diff --git a/cmd/generate.go b/cmd/generate.go
index cb16b20e..7bab740b 100644
--- a/cmd/generate.go
+++ b/cmd/generate.go
@@ -100,7 +100,7 @@ func getDependencies(path string, terragruntOptions *options.TerragruntOptions)
 	}
 
 	// Get deps from `dependencies` and `dependency` blocks
-	if parsedConfig.Dependencies != nil {
+	if parsedConfig.Dependencies != nil && !ignoreDependencyBlocks {
 		for _, parsedPaths := range parsedConfig.Dependencies.Paths {
 			dependencies = append(dependencies, filepath.Join(parsedPaths, "terragrunt.hcl"))
 		}
@@ -400,6 +400,7 @@ var gitRoot string
 var autoPlan bool
 var autoMerge bool
 var ignoreParentTerragrunt bool
+var ignoreDependencyBlocks bool
 var parallel bool
 var createWorkspace bool
 var createProjectName bool
@@ -428,6 +429,7 @@ func init() {
 	generateCmd.PersistentFlags().BoolVar(&autoPlan, "autoplan", false, "Enable auto plan. Default is disabled")
 	generateCmd.PersistentFlags().BoolVar(&autoMerge, "automerge", false, "Enable auto merge. Default is disabled")
 	generateCmd.PersistentFlags().BoolVar(&ignoreParentTerragrunt, "ignore-parent-terragrunt", true, "Ignore parent terragrunt configs (those which don't reference a terraform module). Default is enabled")
+	generateCmd.PersistentFlags().BoolVar(&ignoreDependencyBlocks, "ignore-dependency-blocks", false, "When true, dependencies found in `dependency` blocks will be ignored")
 	generateCmd.PersistentFlags().BoolVar(&parallel, "parallel", true, "Enables plans and applys to happen in parallel. Default is enabled")
 	generateCmd.PersistentFlags().BoolVar(&createWorkspace, "create-workspace", false, "Use different workspace for each project. Default is use default workspace")
 	generateCmd.PersistentFlags().BoolVar(&createProjectName, "create-project-name", false, "Add different name for each project. Default is false")
diff --git a/cmd/generate_test.go b/cmd/generate_test.go
index 9dfdfd45..13110c13 100644
--- a/cmd/generate_test.go
+++ b/cmd/generate_test.go
@@ -25,6 +25,7 @@ func resetForRun() error {
 	autoMerge = false
 	cascadeDependencies = true
 	ignoreParentTerragrunt = true
+	ignoreDependencyBlocks = false
 	parallel = true
 	createWorkspace = false
 	createProjectName = false
@@ -166,6 +167,14 @@ func TestTerragruntDependencies(t *testing.T) {
 	})
 }
 
+func TestIgnoringTerragruntDependencies(t *testing.T) {
+	runTest(t, filepath.Join("golden", "terragrunt_dependency_ignored.yaml"), []string{
+		"--root",
+		filepath.Join("..", "test_examples", "terragrunt_dependency"),
+		"--ignore-dependency-blocks",
+	})
+}
+
 func TestCustomWorkflowName(t *testing.T) {
 	runTest(t, filepath.Join("golden", "different_workflow_names.yaml"), []string{
 		"--root",
diff --git a/cmd/golden/terragrunt_dependency_ignored.yaml b/cmd/golden/terragrunt_dependency_ignored.yaml
new file mode 100644
index 00000000..4c13e945
--- /dev/null
+++ b/cmd/golden/terragrunt_dependency_ignored.yaml
@@ -0,0 +1,17 @@
+automerge: false
+parallel_apply: true
+parallel_plan: true
+projects:
+- autoplan:
+    enabled: false
+    when_modified:
+    - '*.hcl'
+    - '*.tf*'
+  dir: dependency
+- autoplan:
+    enabled: false
+    when_modified:
+    - '*.hcl'
+    - '*.tf*'
+  dir: depender
+version: 3