zbloat: add support for .a

tools/zbloat/README.md

@@ -3,7 +3,7 @@
 This tool makes it easy to analyze the composition of Android applications that use Filament.
 
 - Filament materials are shown in the treemap if `resgen --json` was used in the build.
-- The input path can be a so file, folder, or zip archive (apk or aar).
+- The input path can be a `.so` or `.a` file, a folder, or a zip archive (apk or aar).
 - If the path is a zip or folder, interactively finds the file to analyze.
 - The generated web report is a self-contained HTML file.
 - Reports the gzipped size of all Filament materials.

tools/zbloat/evmar_bloat.py

@@ -77,6 +77,11 @@ def parse_nm(input):
     noaddr_re = re.compile(r'^ + (.) (.*)$')
 
     for line in input:
+        # For static archives (.a), nm prints the object file name.
+        # e.g., "subfolder/file.cpp.o:" or just an empty line between objects.
+        if line.strip().endswith('.o:') or not line.strip():
+            continue
+
         line = line.rstrip()
         match = sym_re.match(line)
         if match:

tools/zbloat/zbloat.py

@@ -177,14 +177,20 @@ def main(args):
         path = choose_from_dir(path)
     elif path.suffix in ['.zip', '.aar', '.apk']:
         path = choose_from_zip(path)
+    elif path.suffix == '.a':
+        pass # It's a single file, just like a .so
 
     dsopath = Path(path)
     size = format_bytes(dsopath.stat().st_size, 2)
-    csize = format_bytes(get_compressed_size(open(dsopath, 'rb').read()), 2)
-    info = f'{size} ({csize})'
 
-    print('Scanning for resgen resources...')
-    resgen_jsons, resgen_blobs = extract_resgen(dsopath)
+    if dsopath.suffix == '.a':
+        info = f'{size}'
+        resgen_jsons, resgen_blobs = [], []
+    else:
+        csize = format_bytes(get_compressed_size(open(dsopath, 'rb').read()), 2)
+        info = f'{size} ({csize})'
+        print('Scanning for resgen resources...')
+        resgen_jsons, resgen_blobs = extract_resgen(dsopath)
 
     print('Running nm... (this might take a while)')
     os.system(f'nm -C -S {path} > {TEMPDIR}/nm.out')