[S] Change in coreboot[main]: util/autoport: Add function to create empty files

[Nicholas Chin (Code Review)]

Nicholas Chin has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/84329?usp=email )

Change subject: util/autoport: Add function to create empty files
......................................................................

util/autoport: Add function to create empty files

As per commit cf4722d317ea (src/mb: Update unlicensable files with the
CC-PDDC SPDX ID) effectively empty files should use the Creative Commons
Public Domain Dedication and Certification (CC-PDDC) license header. Add
a function to create an empty file and add the CC-PDDC SPDX header and a
comment to change the license if content is added.

The only empty files that autoport currently generates are ec.asl and
superio.asl on non-laptop systems, where NoEC() is used.

Change-Id: I409a6d90d671258e318c26e34a35c238d6fd28c1
Signed-off-by: Nicholas Chin 
---
M util/autoport/ec_none.go
M util/autoport/main.go
2 files changed, 12 insertions(+), 7 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/29/84329/1

diff --git a/util/autoport/ec_none.go b/util/autoport/ec_none.go
index a1a0df9..ceb84a0 100644
--- a/util/autoport/ec_none.go
+++ b/util/autoport/ec_none.go
@@ -16,9 +16,6 @@
 }
 `)

-	si := Create(ctx, "acpi/superio.asl")
-	defer si.Close()
-
-	ec := Create(ctx, "acpi/ec.asl")
-	defer ec.Close()
+	Create_Empty(ctx, "acpi/superio.asl", ASL)
+	Create_Empty(ctx, "acpi/ec.asl", ASL)
 }
diff --git a/util/autoport/main.go b/util/autoport/main.go
index c4f884a9..62511e3 100644
--- a/util/autoport/main.go
+++ b/util/autoport/main.go
@@ -120,8 +120,9 @@
 type License string

const (
-    GPL2_only License = "GPL-2.0-only"
-    GPL2_or_later     = "GPL-2.0-or-later"
+    CC_PDDC License	= "CC-PDDC"
+    GPL2_only		= "GPL-2.0-only"
+    GPL2_or_later	= "GPL-2.0-or-later"
 )

var KconfigBool map[string]bool = map[string]bool{}
@@ -233,6 +234,13 @@
    }
    return mf
 }
+func Create_Empty(ctx Context, name string, filetype Filetype) *os.File {
+	f := Create(ctx, name)
+	defer f.Close()
+	Add_SPDX(f, filetype, CC_PDDC)
+	Add_Comment(f, filetype,
+		"Please update the license if adding licensable material.")
+}

func Add_SPDX(f *os.File, filetype Filetype, license License) {
    Add_Comment(f, filetype, "SPDX-License-Identifier: " + string(license))