Merge pull request #4 from mhlias/support_TF_target_resource

Add support for terraform targeted resources in plan and apply.

README.md

@@ -12,7 +12,7 @@ This tool wraps terraform execution forcing a specific structure while providing
 	- Creates an S3 bucket in the current account and enables versioning.
 	- Configures remote terraform state on the created S3 bucket.
 	- Provides management of remote git/github terraform modules using the Terrafile concept.
-	- Provides plan and apply functionality and keeps the local & remote states in sync.
+	- Provides plan and apply functionality with resources target support and keeps the local & remote states in sync.
 
 
 ### Setup Requirements
@@ -98,6 +98,7 @@ The tool accepts the following parameters:
   -p	Terraform Plan
   -s	Sync remote S3 state
   -u	Fetch and update modules from remote repo
+	-t  Terraform resources to target only, (-t resourcetype.resource resourcetype2.resource2)
 
 ```
 

main.go

@@ -29,6 +29,19 @@ type conf struct {
 	account          string
 }
 
+type multiflag []string
+
+func (d *multiflag) String() string {
+	return fmt.Sprintf("%d", *d)
+}
+
+func (d *multiflag) Set(value string) error {
+	*d = append(*d, value)
+	return nil
+}
+
+var targetsTF multiflag
+
 func main() {
 
 	use_mfa := true
@@ -40,6 +53,7 @@ func main() {
 	modulesPtr := flag.Bool("u", false, "Fetch and update modules from remote repo")
 	outputsPtr := flag.Bool("o", false, "Display Terraform outputs")
 	configPtr := flag.Bool("c", false, "Force reconfiguration of Tholos")
+	flag.Var(&targetsTF, "t", "Terraform resources to target only, (-t resourcetype.resource resourcetype2.resource2)")
 
 	flag.Parse()
 
@@ -105,6 +119,7 @@ func main() {
 		State_filename:   fmt.Sprintf("%s-%s-%s.tfstate", project_config.Project, project_config.account, project_config.environment),
 		Versioning:       true,
 		Encrypt_s3_state: project_config.Encrypt_s3_state,
+		TargetsTF:        targetsTF,
 	}
 
 	modules := &tf_helper.Modules{}

tf_helper/apply.go

@@ -1,6 +1,7 @@
 package tf_helper
 
 import (
+	"fmt"
 	"log"
 )
 
@@ -10,6 +11,12 @@ func (c *Config) Apply() {
 
 	exec_args := []string{"apply", "plans/plan.tfplan"}
 
+	if len(c.TargetsTF) > 0 {
+		for _, t := range c.TargetsTF {
+			exec_args = append(exec_args, fmt.Sprintf("-target=%s", t))
+		}
+	}
+
 	log.Println("[INFO] Applying Terraform plan.")
 
 	if !ExecCmd(cmd_name, exec_args) {

tf_helper/plan.go

@@ -1,6 +1,7 @@
 package tf_helper
 
 import (
+	"fmt"
 	"log"
 
 	"github.com/mhlias/tholos/tholos"
@@ -42,6 +43,12 @@ func (c *Config) Plan(tholos_conf *tholos.Tholos_config) {
 
 	exec_args = []string{"plan", "-module-depth=3", "-refresh=true", "-out=plans/plan.tfplan", "-var-file=params/env.tfvars"}
 
+	if len(c.TargetsTF) > 0 {
+		for _, t := range c.TargetsTF {
+			exec_args = append(exec_args, fmt.Sprintf("-target=%s", t))
+		}
+	}
+
 	log.Println("[INFO] Running Terraform plan.")
 
 	if !ExecCmd(cmd_name, exec_args) {

tf_helper/state.go

@@ -14,6 +14,7 @@ type Config struct {
 	State_filename   string
 	Encrypt_s3_state bool
 	Versioning       bool
+	TargetsTF        []string
 }
 
 func (c *Config) Create_bucket(client interface{}) bool {