Use git-ls-files(1) to compute list of source files

It's not clear whether or not Python supports '\0' for null: the
reference[1] says nothing about this specific escape sequence, but
Python 3.7 seems to recognize it…

repr('\0') says "'\\x00'", so let's use that.

[1]: https://docs.python.org/3/reference/lexical_analysis.html#string-and-bytes-literals

2 files changed, 17 insertions, 34 deletions

diff --git a/repo/www/Makefile b/repo/www/Makefile
index ca50752..8f5bb2a 100644
--- a/repo/www/Makefile
+++ b/repo/www/Makefile
@@ -16,7 +16,7 @@ dependencies = deps.mk
 include $(dependencies)
 
 $(dependencies): make-deps.py $(text_folders)
-	python3 $< "$(TEXT_FILES)" $(TOP_DIR) $(OUT_DIR)
+	python3 $< "$(TEXT_FILES)" $(OUT_DIR)
 
 site: $(pages)
 
diff --git a/repo/www/make-deps.py b/repo/www/make-deps.py
index 189ccfd..c2a88e1 100755
--- a/repo/www/make-deps.py
+++ b/repo/www/make-deps.py
@@ -20,10 +20,11 @@ We want to compute:
 from collections import defaultdict
 from dataclasses import dataclass, field
 from os import path
-from subprocess import run
 from sys import argv, exit
 from typing import List, Set
 
+from git import Repo
+
 
 @dataclass
 class Directory:
@@ -32,45 +33,23 @@ class Directory:
 
 
 def parse_arguments(args):
-    if len(args) != 4:
-        exit(f'Usage: {argv[0]} EXTENSIONS TOP-DIR OUTPUT-DIR')
-
-    return argv[1].split(), argv[2], argv[3]
-
-
-def join(collections, joiner):
-    out = []
-
-    for c in collections[:-1]:
-        out.extend(c)
-        out.append(joiner)
+    if len(args) != 3:
+        exit(f'Usage: {argv[0]} EXTENSIONS OUTPUT-DIR')
 
-    out.extend(collections[-1])
-    return tuple(out)
+    return argv[1].split(), argv[2]
 
 
-def find_sources(extensions, top_dir):
-    filters = tuple(('-name', '*.'+ext) for ext in extensions)
-
-    p = run(
-        # TODO: use git ls-files
-        ('find', top_dir) + join(filters, '-o'),
-        capture_output=True, check=True, text=True
-    )
-
-    return p.stdout.splitlines()
+def find_sources(extensions, repository):
+    patterns = (f'**.{ext}' for ext in extensions)
+    zero = '\x00'
+    return repository.git.ls_files('-z', *patterns).strip(zero).split(zero)
 
 
 def compute_directories(files, top_dir):
     directories = defaultdict(Directory)
 
     for f in files:
-        fpath, fname = path.split(f)
-        fdir = (
-            path.relpath(fpath, top_dir)
-            if fpath != top_dir
-            else ''
-        )
+        fdir, fname = path.split(f)
 
         directories[fdir].files.append(fname)
 
@@ -108,8 +87,12 @@ def write_dependencies(deps, directories, top_dir, out_dir):
 
 
 def main(arguments):
-    extensions, top_dir, out_dir = parse_arguments(arguments)
-    source_files = find_sources(extensions, top_dir)
+    extensions, out_dir = parse_arguments(arguments)
+
+    repository = Repo(search_parent_directories=True)
+    top_dir = repository.working_dir
+
+    source_files = find_sources(extensions, repository)
 
     directories = compute_directories(source_files, top_dir)