Use only parent env vars when executing if no others provided

go.sum

@@ -42,6 +42,7 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
+github.com/docker/docker v1.13.1 h1:IkZjBSIc8hBjLpqeAbeE5mca5mNgeatLHBy3GO78BWo=
 github.com/fatih/color v1.7.0 h1:DkWD4oS2D8LGGgTQ6IvwJJXSL5Vp2ffcQg58nFV38Ys=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
@@ -142,6 +143,7 @@ github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrk
 github.com/mitchellh/go-testing-interface v1.0.0 h1:fzU/JVNcaqHQEcVFAKeR41fkiLdIPrefOvVG1VZ96U0=
 github.com/mitchellh/go-testing-interface v1.0.0/go.mod h1:kRemZodwjscx+RGhAo8eIhFbs2+BFgRtFPeD/KE+zxI=
 github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
+github.com/moby/moby v1.13.1 h1:mC5WwQwCXt/dYxZ1cIrRsnJAWw7VdtcTZUIGr4tXzOM=
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e h1:fD57ERR4JtEqsWbfPhv4DMiApHyliiK5xCTNVSPiaAs=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=

internal/apply/apply.go

@@ -52,7 +52,9 @@ Only a single environment may be suitable for an initial test, but for a real sy
 func applyAll(dir string, projectConfig projectconfig.ZeroProjectConfig, applyEnvironments []string) {
 	environmentArg := fmt.Sprintf("ENVIRONMENT=%s", strings.Join(applyEnvironments, ","))
 
+	// Go through each of the modules and run `make`
 	for _, mod := range projectConfig.Modules {
+		// Add env vars for the makefile
 		envList := []string{
 			environmentArg,
 			fmt.Sprintf("PROJECT_DIR=%s", path.Join(dir, mod.Files.Directory)),
@@ -66,6 +68,7 @@ func applyAll(dir string, projectConfig projectconfig.ZeroProjectConfig, applyEn
 			modulePath = filepath.Join(dir, modulePath)
 		}
 
+		// Get project credentials for the makefile
 		credentials := globalconfig.GetProjectCredentials(projectConfig.Name)
 
 		envList = util.AppendProjectEnvToCmdEnv(mod.Parameters, envList)

internal/util/util.go

@@ -59,6 +59,7 @@ func ExecuteCommand(cmd *exec.Cmd, pathPrefix string, envars []string) {
 
 	var errStdout, errStderr error
 
+	cmd.Env = os.Environ()
 	if envars != nil {
 		cmd.Env = append(os.Environ(), envars...)
 	}
@@ -99,6 +100,7 @@ func ExecuteCommandOutput(cmd *exec.Cmd, pathPrefix string, envars []string) str
 		cmd.Dir = path.Join(dir, pathPrefix)
 	}
 
+	cmd.Env = os.Environ()
 	if envars != nil {
 		cmd.Env = append(os.Environ(), envars...)
 	}