Support commenting out overlays

src/Tools/mkoverlay/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "mkoverlay"
-version = "1.5.1"
+version = "1.6.0"
 edition = "2021"
 
 [profile.release]

src/Tools/mkoverlay/src/types/json_reader/mod.rs

@@ -7,7 +7,10 @@ pub fn read_config(input: Input) -> Result<OverlayDesc, Error> {
 
     if let Some(objects) = json_reader.as_object() {
         for object in objects {
-            overlay_desc.push(read_as_slot(object)?);
+            let slot = read_as_slot(object)?;
+            if !slot.is_commented_out() && slot.has_sections() {
+                overlay_desc.push(slot);
+            }
         }
 
         Ok(overlay_desc)
@@ -24,7 +27,10 @@ fn read_as_slot(json_value: (&String, &serde_json::Value)) -> Result<OverlaySlot
 
     if let Some(json_value) = json_value.as_object() {
         for (name, json_value) in json_value {
-            slot.add_section(read_as_section(name.clone(), json_value)?);
+            let section = read_as_section(name.clone(), json_value)?;
+            if !section.is_commented_out() {
+                slot.add_section(section);
+            }
         }
     }
 

src/Tools/mkoverlay/src/types/mod.rs

@@ -2,6 +2,8 @@ pub mod json_reader;
 
 pub type OverlayDesc = Vec<OverlaySlot>;
 
+const COMMENT_PREFIX:char = '!';
+
 pub struct OverlaySlot {
     pub(super) name:      String,
     pub(super) sections:  Vec<OverlaySection>
@@ -15,6 +17,14 @@ impl OverlaySlot {
     pub fn add_section(&mut self, section: OverlaySection) {
         self.sections.push(section);
     }
+
+    pub fn is_commented_out(&self) -> bool {
+        self.name.starts_with(COMMENT_PREFIX)
+    }
+
+    pub fn has_sections(&self) -> bool {
+        !self.sections.is_empty()
+    }
 }
 
 pub struct OverlaySection {
@@ -30,4 +40,8 @@ impl OverlaySection {
     pub fn add_file_pattern(&mut self, file_pattern: String) {
         self.file_pattern.push(file_pattern);
     }
+
+    pub fn is_commented_out(&self) -> bool {
+        self.name.starts_with(COMMENT_PREFIX)
+    }
 }