Update stack processor (#68)

* Update stack processor

* Update stack processor

* Update stack processor

* Update stack processor

Makefile

@@ -1,4 +1,8 @@
 SHELL := /bin/bash
+GOOS=darwin
+#GOOS=linux
+GOARCH=amd64
+VERSION=test2
 
 # List of targets the `readme` target should call before generating the readme
 export README_DEPS ?= docs/targets.md
@@ -8,3 +12,9 @@ export README_DEPS ?= docs/targets.md
 ## Lint terraform code
 lint:
 	$(SELF) terraform/install terraform/get-modules terraform/get-plugins terraform/lint terraform/validate
+
+build:
+	env GOOS=${GOOS} GOARCH=${GOARCH} go build -o build/atmos -v -ldflags "-X 'github.com/cloudposse/atmos/cmd.Version=${VERSION}'"
+
+deps:
+	go mod download

internal/config/utils.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"github.com/bmatcuk/doublestar"
 	g "github.com/cloudposse/atmos/internal/globals"
+	s "github.com/cloudposse/atmos/pkg/stack"
 	u "github.com/cloudposse/atmos/pkg/utils"
 	"github.com/fatih/color"
 	"os"
@@ -32,7 +33,7 @@ func findAllStackConfigsInPaths(
 		}
 
 		// Find all matches in the glob
-		matches, err := doublestar.Glob(pathWithExt)
+		matches, err := s.GetGlobMatches(pathWithExt)
 		if err != nil {
 			return nil, nil, false, err
 		}

pkg/component/component_processor.go

@@ -105,7 +105,6 @@ func ProcessComponentInStack(component string, stack string) (map[string]interfa
 			}
 
 			if tenantFound == true && environmentFound == true && stageFound == true {
-				stack = stackName
 				break
 			}
 		}

pkg/stack/stack_processor.go

@@ -2,14 +2,12 @@ package stack
 
 import (
 	"fmt"
-	"github.com/bmatcuk/doublestar"
 	g "github.com/cloudposse/atmos/internal/globals"
 	c "github.com/cloudposse/atmos/pkg/convert"
 	m "github.com/cloudposse/atmos/pkg/merge"
 	"github.com/cloudposse/atmos/pkg/utils"
 	"github.com/pkg/errors"
 	"gopkg.in/yaml.v2"
-	"io/ioutil"
 	"path"
 	"path/filepath"
 	"sort"
@@ -116,12 +114,12 @@ func ProcessYAMLConfigFile(
 
 	var configs []map[interface{}]interface{}
 
-	stackYamlConfig, err := ioutil.ReadFile(filePath)
+	stackYamlConfig, err := getFileContent(filePath)
 	if err != nil {
 		return nil, nil, err
 	}
 
-	stackMapConfig, err := c.YAMLToMapOfInterfaces(string(stackYamlConfig))
+	stackMapConfig, err := c.YAMLToMapOfInterfaces(stackYamlConfig)
 	if err != nil {
 		return nil, nil, err
 	}
@@ -151,7 +149,7 @@ func ProcessYAMLConfigFile(
 			}
 
 			// Find all import matches in the glob
-			importMatches, err := doublestar.Glob(impWithExtPath)
+			importMatches, err := GetGlobMatches(impWithExtPath)
 			if err != nil {
 				return nil, nil, err
 			}

pkg/stack/stack_processor_utils.go

@@ -1,13 +1,22 @@
 package stack
 
 import (
+	"fmt"
+	"github.com/bmatcuk/doublestar"
 	g "github.com/cloudposse/atmos/internal/globals"
 	"github.com/cloudposse/atmos/pkg/utils"
+	"io/ioutil"
 	"os"
 	"path"
 	"path/filepath"
 	"sort"
 	"strings"
+	"sync"
+)
+
+var (
+	getFileContentSyncMap = sync.Map{}
+	getGlobMatchesSyncMap = sync.Map{}
 )
 
 // FindComponentStacks finds all infrastructure stack config files where the component or the base component is defined
@@ -196,3 +205,37 @@ func CreateComponentStackMap(basePath string, filePath string) (map[string]map[s
 
 	return componentStackMap, nil
 }
+
+// getFileContent tries to read and return the file content from the sync map if it exists in the map,
+// otherwise it reads the file, stores its content in the map and returns the content
+func getFileContent(filePath string) (string, error) {
+	existingContent, found := getFileContentSyncMap.Load(filePath)
+	if found == true && existingContent != nil {
+		return fmt.Sprintf("%s", existingContent), nil
+	}
+
+	content, err := ioutil.ReadFile(filePath)
+	if err != nil {
+		return "", err
+	}
+	getFileContentSyncMap.Store(filePath, content)
+
+	return string(content), nil
+}
+
+// GetGlobMatches tries to read and return the Glob matches content from the sync map if it exists in the map,
+// otherwise it finds and returns all files matching the pattern, stores the files in the map and returns the files
+func GetGlobMatches(pattern string) ([]string, error) {
+	existingMatches, found := getGlobMatchesSyncMap.Load(pattern)
+	if found == true && existingMatches != nil {
+		return strings.Split(fmt.Sprintf("%s", existingMatches), ","), nil
+	}
+
+	matches, err := doublestar.Glob(pattern)
+	if err != nil {
+		return nil, err
+	}
+	getGlobMatchesSyncMap.Store(pattern, strings.Join(matches, ","))
+
+	return matches, nil
+}