[buildcore] Add ability to setup host specific build directories

deps/buildcore/scripts/pybb.py

@@ -12,25 +12,13 @@
 #                     don't translate well to that other operating system
 
 import os
+import platform
 import shutil
 import subprocess
 import sys
 from typing import List, Optional
 
 
-def cat(paths: List[str]) -> int:
-    for path in paths:
-        try:
-            with open(path) as f:
-                data = f.read()
-                sys.stdout.write(data)
-        except FileNotFoundError:
-            sys.stderr.write('cat: {}: no such file or directory\n'.format(path))
-            return 1
-    sys.stdout.write('\n')
-    return 0
-
-
 def mkdir(path: str):
     if not os.path.exists(path):
         os.mkdir(path)
@@ -91,6 +79,31 @@ def conan() -> int:
     return 0
 
 
+def cat(paths: List[str]) -> int:
+    for path in paths:
+        try:
+            with open(path) as f:
+                data = f.read()
+                sys.stdout.write(data)
+        except FileNotFoundError:
+            sys.stderr.write('cat: {}: no such file or directory\n'.format(path))
+            return 1
+    sys.stdout.write('\n')
+    return 0
+
+
+def get_env(var_name: str) -> int:
+    if var_name not in os.environ:
+        return 1
+    sys.stdout.write(os.environ[var_name])
+    return 0
+
+
+def hostname() -> int:
+    sys.stdout.write(platform.node())
+    return 0
+
+
 def main() -> int:
     err = 0
     if sys.argv[1] == 'mkdir':
@@ -109,6 +122,10 @@ def main() -> int:
         err = cmake_build(sys.argv[2], sys.argv[3] if len(sys.argv) > 3 else None)
     elif sys.argv[1] == 'cat':
         err = cat(sys.argv[2:])
+    elif sys.argv[1] == 'getenv':
+        err = get_env(sys.argv[2])
+    elif sys.argv[1] == 'hostname':
+        err = hostname()
     else:
         sys.stderr.write('Command not found\n')
         err = 1
@@ -117,7 +134,6 @@ def main() -> int:
 
 if __name__ == '__main__':
     try:
-        err = main()
-        sys.exit(err)
+        sys.exit(main())
     except KeyboardInterrupt:
-        sys.exit(err)
+        sys.exit(1)