feat(action): pass env vars into coreboot container

Signed-off-by: AtomicFS <[email protected]>

action/recipes/coreboot.go

@@ -16,6 +16,7 @@ import (
 
 	"dagger.io/dagger"
 	"github.com/9elements/firmware-action/action/container"
+	"github.com/9elements/firmware-action/action/environment"
 	"github.com/9elements/firmware-action/action/filesystem"
 	"github.com/9elements/firmware-action/action/logging"
 )
@@ -378,7 +379,15 @@ func (opts CorebootOpts) buildFirmware(ctx context.Context, client *dagger.Clien
 	)
 
 	// Setup environment variables in the container
-	envVars := map[string]string{}
+	// envVars := map[string]string{}
+	envVars, err := crebootPassEnvVars(opts.RepoPath)
+	if err != nil {
+		slog.Error(
+			"Failed to extract environment variables from current environment",
+			slog.Any("error", err),
+		)
+		return myContainerPrevious, fmt.Errorf("coreboot build failed: %w", err)
+	}
 	for key, value := range envVars {
 		myContainer = myContainer.WithEnvVariable(key, value)
 	}
@@ -401,3 +410,41 @@ func (opts CorebootOpts) buildFirmware(ctx context.Context, client *dagger.Clien
 	// Extract artifacts
 	return myContainer, container.GetArtifacts(ctx, myContainer, opts.CommonOpts.GetArtifacts())
 }
+
+func crebootPassEnvVars(repoPath string) (map[string]string, error) {
+	passVariables := []string{"KERNELVERSION", "BUILD_TIMELESS"}
+	envVariables := environment.FetchEnvVars(passVariables)
+
+	// Get current working directory
+	pwd, err := os.Getwd()
+	if err != nil {
+		return nil, err
+	}
+
+	// If KERNELVERSION is not defined in current environment
+	if _, ok := envVariables["KERNELVERSION"]; ok {
+		// Check if repoPath differs from PWD
+		if pwd != filepath.Join(pwd, repoPath) {
+			// This means that the target repository is sub-directory
+			//   (possibly a git submodule)
+			// coreboot make will fail to run 'git describe' because of
+			//   missing '.git' directory once the content of repoPath
+			//   is copied into the container
+			// Run 'git describe' now and create a new environment variable
+			//   to pass over into the container
+			// This way, the compiled coreboot binary will not have unknown version
+
+			// To check for coreboot version:
+			//   $ cbfstool build/coreboot.rom extract -n build_info -f /tmp/foo
+			//   $ grep COREBOOT_VERSION /tmp/foo
+
+			describe, err := filesystem.GitDescribeCoreboot(repoPath)
+			if err != nil {
+				return nil, err
+			}
+			envVariables["KERNELVERSION"] = describe
+		}
+	}
+
+	return envVariables, nil
+}