[Compress][Gerber][Fixed] Problems with inner layers

- When using legacy protel extensions

Fixes #446

CHANGELOG.md

@@ -71,6 +71,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Copy files:
   - PCB not loaded if the only action was to copy the 3D models
   - Problems for STEP models when copying models
+- Gerber:
+  - Problems trying to compress gerbers for a board with inner layers when
+    using legacy file extensions (#446)
 
 ## [1.6.2] - 2023-04-24
 ### Added

kibot/layer.py

@@ -22,6 +22,7 @@ LAYER_ORDER = ['F.Cu', 'F.Mask', 'F.SilkS', 'F.Paste', 'F.Adhes', 'F.CrtYd', 'F.
                'In20.Cu', 'In21.Cu', 'In22.Cu', 'In23.Cu', 'In24.Cu', 'In25.Cu', 'In26.Cu', 'In27.Cu', 'In28.Cu', 'In29.Cu',
                'In30.Cu', 'B.Cu', 'B.Mask', 'B.SilkS', 'B.Paste', 'B.Adhes', 'B.CrtYd', 'B.Fab']
 LAYER_PRIORITY = {}
+DEFAULT_INNER_LAYER_NAMES = set()
 
 
 def create_print_priority(board):
@@ -305,7 +306,7 @@ class Layer(Optionable):
         # 1) Internal list
         if self.layer in Layer.DEFAULT_LAYER_NAMES:
             self._id = Layer.DEFAULT_LAYER_NAMES[self.layer]
-            self._is_inner = False
+            self._is_inner = self.layer in DEFAULT_INNER_LAYER_NAMES
         else:
             id = Layer._pcb_layers.get(self.layer)
             if id is not None:
@@ -347,6 +348,7 @@ class Layer(Optionable):
 # Add all the Inner layers
 for i in range(1, 30):
     name = 'In'+str(i)+'.Cu'
+    DEFAULT_INNER_LAYER_NAMES.add(name)
     Layer.DEFAULT_LAYER_NAMES[name] = pcbnew.In1_Cu+i-1
     Layer.DEFAULT_LAYER_DESC[name] = 'Inner layer '+str(i)
 if GS.ki6:

tests/yaml_samples/gerber_inner_protel_1.kibot.yaml

@@ -30,3 +30,12 @@ outputs:
       output: '%f_%i.%x'
 
     layers: all
+
+  - name: result
+    comment: Test tarball compress
+    type: compress
+    options:
+      format: TAR
+      compression: deflated
+      files:
+        - from_output: gerbers