Add intermediate step to cache site tree

Seems kind of wasteful to recompute it every time.  Also, now
subsequent scripts don't have to care about file extensions anymore.

1 files changed, 9 insertions, 7 deletions

diff --git a/repo/www/generate-deps.py b/repo/www/generate-deps.py
index 8388c40..e82b691 100755
--- a/repo/www/generate-deps.py
+++ b/repo/www/generate-deps.py
@@ -18,19 +18,20 @@ We want to compute:
   OUTPUT/foo/index.html: foo | OUTPUT/foo
 """
 
+import json
 from os import path
 from sys import argv, exit
 
 from git import Repo
 
-from helpers import compute_directories
+from helpers import deserialize_directories
 
 
 def parse_arguments(args):
-    if len(args) != 3:
-        exit(f'Usage: {argv[0]} EXTENSIONS OUTPUT-DIR')
+    if len(args) != 4:
+        exit(f'Usage: {argv[0]} SITE-TREE OUTPUT-FILE OUTPUT-DIR')
 
-    return argv[1].split(), argv[2]
+    return argv[1], argv[2], argv[3]
 
 
 def pjoin(directory, item):
@@ -84,14 +85,15 @@ def write_dependencies(deps_file, directories, top_dir, out_dir):
 
 
 def main(arguments):
-    extensions, out_dir = parse_arguments(arguments)
+    tree_file, deps_file, out_dir = parse_arguments(arguments)
 
     repository = Repo(search_parent_directories=True)
     top_dir = path.relpath(repository.working_dir, path.curdir)
 
-    directories = compute_directories(extensions, repository)
+    with open(tree_file) as tree:
+        directories = deserialize_directories(json.load(tree))
 
-    with open('deps.mk', 'w') as deps:
+    with open(deps_file, 'w') as deps:
         write_dependencies(deps, directories, top_dir, out_dir)