Added the possibility to append (concatenate) files during build

Signed-off-by: Ole Herman Schumacher Elgesem <[email protected]>

cfbs/commands.py

@@ -13,7 +13,9 @@
     write_json,
     read_json,
     merge_json,
+    read_file,
     mkdir,
+    touch,
     rm,
     cp,
     sh,
@@ -233,6 +235,16 @@ def build_step(module, step, max_length):
         else:
             merged = extras
         write_json(dst, merged)
+    elif operation == "append":
+        src, dst = args
+        if dst in [".", "./"]:
+            dst = ""
+        print(f"{prefix} append '{src}' 'masterfiles/{dst}'")
+        src, dst = os.path.join(source, src), os.path.join(destination, dst)
+        if not os.path.exists(dst):
+            touch(dst)
+        assert os.path.isfile(dst)
+        sh(f"cat '{src}' >> '{dst}'")
     else:
         user_error(f"Unknown build step operation: {operation}")
 

cfbs/utils.py

@@ -7,17 +7,26 @@
 import requests
 
 
+def _sh(cmd: str):
+    # print(cmd)
+    os.system(cmd)
+
+
 def sh(cmd: str, directory=None):
     if directory:
-        os.system(f"( cd {directory} && {cmd} 1>/dev/null 2>/dev/null )")
+        _sh(f"( cd {directory} && {cmd} ) 1>/dev/null 2>/dev/null")
         return
-    os.system(f"{cmd} 1>/dev/null 2>/dev/null")
+    _sh(f"( {cmd} ) 1>/dev/null 2>/dev/null")
 
 
 def mkdir(path: str):
     os.system(f"mkdir -p {path}")
 
 
+def touch(path: str):
+    os.system(f"touch {path}")
+
+
 def rm(path: str):
     os.system(f'rm -rf "{path}"')