Feature/73 guarantee unique project names (#175)

* Guarantee unique project names to prevent image name collisions

* Guarantee unique project names to prevent image name collisions

* Update GetWorkingDir to expect err and update ConfigSettings to look for strippedProjectName

airflow/docker.go

@@ -3,6 +3,7 @@ package airflow
 import (
 	"bytes"
 	"context"
+	"crypto/md5"
 	"fmt"
 	"html/template"
 	"os"
@@ -56,6 +57,24 @@ type ComposeConfig struct {
 	AirflowWebserverPort string
 }
 
+// projectNameUnique creates a reasonably unique project name based on the hashed
+// path of the project. This prevents collisions of projects with identical dir names
+// in different paths. ie (~/dev/project1 vs ~/prod/project1)
+func projectNameUnique() (string, error) {
+	projectName := config.CFG.ProjectName.GetString()
+
+	pwd, err := fileutil.GetWorkingDir()
+
+	if err != nil {
+		return "", errors.Wrap(err, "error retrieving working directory")
+	}
+
+	b := md5.Sum([]byte(pwd))
+	s := fmt.Sprintf("%x", b[:])
+
+	return projectName + "_" + s[0:6], nil
+}
+
 // repositoryName creates an airflow repository name
 func repositoryName(name string) string {
 	return fmt.Sprintf("%s/%s", name, componentName)
@@ -157,7 +176,12 @@ func createProject(projectName, airflowHome string, envFile string) (project.API
 // Start starts a local airflow development cluster
 func Start(airflowHome string, envFile string) error {
 	// Get project name from config
-	projectName := config.CFG.ProjectName.GetString()
+	projectName, err := projectNameUnique()
+	strippedProjectName := strings.Replace(projectName, "_", "", -1)
+
+	if err != nil {
+		return errors.Wrap(err, "error retrieving working directory")
+	}
 
 	// Create a libcompose project
 	project, err := createProject(projectName, airflowHome, envFile)
@@ -216,7 +240,8 @@ func Start(airflowHome string, envFile string) error {
 
 	if fileState {
 		for _, info := range psInfo {
-			if strings.Contains(info["Name"], fmt.Sprintf("%s_scheduler", projectName)) {
+			if strings.Contains(info["Name"], strippedProjectName) &&
+				strings.Contains(info["Name"], "webserver") {
 				settings.ConfigSettings(info["Id"])
 			}
 		}
@@ -233,7 +258,11 @@ func Start(airflowHome string, envFile string) error {
 // Kill stops a local airflow development cluster
 func Kill(airflowHome string) error {
 	// Get project name from config
-	projectName := config.CFG.ProjectName.GetString()
+	projectName, err := projectNameUnique()
+
+	if err != nil {
+		return errors.Wrap(err, "error retrieving working directory")
+	}
 
 	// Create a libcompose project
 	project, err := createProject(projectName, airflowHome, "")
@@ -290,7 +319,12 @@ func Logs(airflowHome string, webserver, scheduler, follow bool) error {
 // Stop a running docker project
 func Stop(airflowHome string) error {
 	// Get project name from config
-	projectName := config.CFG.ProjectName.GetString()
+	projectName, err := projectNameUnique()
+
+	if err != nil {
+		return errors.Wrap(err, "error retrieving working directory")
+	}
+
 	// Create a libcompose project
 	project, err := createProject(projectName, airflowHome, "")
 	if err != nil {
@@ -309,7 +343,11 @@ func Stop(airflowHome string) error {
 // PS prints the running airflow containers
 func PS(airflowHome string) error {
 	// Get project name from config
-	projectName := config.CFG.ProjectName.GetString()
+	projectName, err := projectNameUnique()
+
+	if err != nil {
+		return errors.Wrap(err, "error retrieving working directory")
+	}
 
 	// Create a libcompose project
 	project, err := createProject(projectName, airflowHome, "")

docker/docker.go

@@ -64,6 +64,5 @@ func AirflowCommand(id string, airflowCommand string) string {
 	}
 
 	stringOut := string(out)
-
 	return stringOut
 }