Allow setting tags on files

This does not affect FuseSoC, but allows Edalize backends to take
different decisions depending on which tags that are set. Use-cases
for this is to mark HDL source files as simulation files to avoid
having them being sent to synthesis, and marking which tool in a flow
that should consume a particular TCL file.

Author: olofk

fusesoc/capi2/core.py

@@ -269,6 +269,7 @@ def get_files(self, flags):
                     for k, v in attributes.items()
                     if (type(v) == bool and v == True)
                     or (type(v) == str and len(v)) > 0
+                    or (type(v) == list and len(v)) > 0
                 }
 
                 _src_files.append(attributes)

fusesoc/capi2/coredata.py

@@ -98,9 +98,12 @@ def _setup_file(self, file, fs):
             "is_include_file": False,
             "include_path": "",
             "logical_name": "",
+            "tags": [],
         }
 
-        # Check if file_type or logical_name are present globally in fileset
+        # Check if tag, file_type or logical_name are present globally in fileset
+        if "tags" in fs:
+            d["tags"] = fs["tags"][:]
         if "file_type" in fs:
             d["file_type"] = fs["file_type"]
         if "logical_name" in fs:

fusesoc/capi2/json_schema.py

@@ -203,6 +203,13 @@
               "description": "Default logical_name (i.e. library) for files in fileset",
               "type": "string"
             },
+            "^tags$": {
+              "description": "Default tags for files in fileset",
+               "type": "array",
+               "items": {
+                 "type": "string"
+               }
+            },
             "^files(_append)?$": {
               "description": "Files in fileset",
               "type": "array",
@@ -237,6 +244,13 @@
                             "description": "Logical name, i.e. library for VHDL/SystemVerilog. Overrides the logical_name set on the containing fileset",
                             "type": "string"
                           },
+                          "tags": {
+                            "description": "Tags, special file-specific hints for the backends. Appends the tags set on the containing fileset",
+                            "type": "array",
+                            "items": {
+                              "type": "string"
+                            }
+                          },
                           "copyto": {
                             "description": "Copy the source file to this path in the work directory",
                             "type": "string"