feat: add DEVSPACE_EXECUTABLE environment variable

Author: FabianKramm

pkg/devspace/config/loader/variable/predefined_variable.go

@@ -41,6 +41,13 @@ var predefinedVars = map[string]PredefinedVariableFunction{
 		}
 		return name, nil
 	},
+	"DEVSPACE_EXECUTABLE": func(ctx context.Context, options *PredefinedVariableOptions) (interface{}, error) {
+		ex, err := os.Executable()
+		if err != nil {
+			return nil, err
+		}
+		return ex, nil
+	},
 	"DEVSPACE_TMPDIR": func(ctx context.Context, options *PredefinedVariableOptions) (interface{}, error) {
 		tempFolder, ok := values.TempFolderFrom(ctx)
 		if !ok {

pkg/devspace/config/loader/variable/resolver.go

@@ -19,7 +19,7 @@ import (
 	"github.com/pkg/errors"
 )
 
-var AlwaysResolvePredefinedVars = []string{"DEVSPACE_NAME", "DEVSPACE_TMPDIR", "DEVSPACE_VERSION", "DEVSPACE_RANDOM", "DEVSPACE_PROFILE", "DEVSPACE_USER_HOME", "DEVSPACE_TIMESTAMP", "devspace.context", "DEVSPACE_CONTEXT", "devspace.namespace", "DEVSPACE_NAMESPACE"}
+var AlwaysResolvePredefinedVars = []string{"DEVSPACE_NAME", "DEVSPACE_EXECUTABLE", "DEVSPACE_TMPDIR", "DEVSPACE_VERSION", "DEVSPACE_RANDOM", "DEVSPACE_PROFILE", "DEVSPACE_USER_HOME", "DEVSPACE_TIMESTAMP", "devspace.context", "DEVSPACE_CONTEXT", "devspace.namespace", "DEVSPACE_NAMESPACE"}
 
 // NewResolver creates a new resolver that caches resolved variables in memory and in the provided cache
 func NewResolver(localCache localcache.Cache, predefinedVariableOptions *PredefinedVariableOptions, flags []string, log log.Logger) (Resolver, error) {