Fix relative dir calculation with multiple configs

Resolves #25

config/config.go

@@ -78,7 +78,8 @@ type Project struct {
 	// The paths of the docker compose files for this project. Can be
 	// relative or absolute paths.
 	DockerComposeFilenames []string `mapstructure:"docker_compose_files"`
-	// The path of the root of the project (or its basename). Do we need this?
+	// Directory is the full-path to the location of the dev configuration
+	// file that contains this project configuration.
 	Directory string `mapstructure:"directory"`
 	// Ignored if set by user.
 	Name string `mapstructure:"name"`
@@ -202,6 +203,11 @@ func setDefaults(config *Dev) {
 		if project.Name == "" {
 			project.Name = name
 		}
+		// Have to remember where the project was defined so we can
+		// figure out relative directories when launching commands. See
+		// Project.Shell. This is also passed in when parsing docker-compose
+		// files where it used to load env files.
+		project.Directory = filepath.Dir(config.Filename)
 	}
 }
 

project.go

@@ -3,7 +3,6 @@ package dev
 import (
 	"fmt"
 	"os"
-	"path/filepath"
 	"strings"
 
 	log "github.com/sirupsen/logrus"
@@ -78,9 +77,9 @@ func (p *Project) Shell(appConfig *c.Dev, args []string) {
 	if err != nil {
 		log.Fatalf("Failed to get current directory: %s", err)
 	}
-	configDir := filepath.Dir(appConfig.Filename)
 
 	relativePath := ""
+	configDir := p.Config.Directory
 	if strings.HasPrefix(cwd, configDir) {
 		start := strings.Index(cwd, configDir) + len(configDir) + 1
 		if start < len(cwd) {