better zip_static_files.py, thanks Niphlod

VERSION

@@ -1 +1 @@
-Version 2.0.9 (2012-09-20 11:16:45) stable
+Version 2.0.9 (2012-09-20 11:19:07) stable

scripts/zip_static_files.py

@@ -3,32 +3,45 @@
 
 ## launch with python web2py.py -S myapp -R scripts/zip_static_files.py
 
-ALLOWED_EXTS = ['.css', '.js']
+
 import os
 import gzip
-static_path = os.path.abspath(os.path.join(request.folder, 'static'))
-filelist = []
-for root, dir, files in os.walk(static_path):
-    for file in files:
-        filelist.append(os.path.join(root, file))
-tsave = 0
-for fi in filelist:
-    extension = os.path.splitext(fi)
-    extension = len(extension) > 1 and extension[1] or None
-    if not extension or extension not in ALLOWED_EXTS:
-        print 'skipping %s' % os.path.basename(fi)
-        continue
-    fstats = os.stat(fi)
-    atime, mtime = fstats.st_atime, fstats.st_mtime
-    gfi = fi + '.gz'
-    print 'gzipping %s to %s' % (os.path.basename(fi), os.path.basename(gfi))
-    f_in = open(fi, 'rb')
-    f_out = gzip.open(gfi, 'wb')
-    f_out.writelines(f_in)
-    f_out.close()
-    f_in.close()
-    os.utime(gfi, (atime,mtime))
-    saved = fstats.st_size - os.stat(gfi).st_size
-    tsave+= saved
 
-print 'saved %s KB' % (int(tsave)/1000.0)
+def zip_static(filelist=[]):
+    tsave = 0
+    for fi in filelist:
+        extension = os.path.splitext(fi)
+        extension = len(extension) > 1 and extension[1] or None
+        if not extension or extension not in ALLOWED_EXTS:
+            print 'skipping %s' % os.path.basename(fi)
+            continue
+        fstats = os.stat(fi)
+        atime, mtime = fstats.st_atime, fstats.st_mtime
+        gfi = fi + '.gz'
+        if os.path.isfile(gfi):
+            zstats = os.stat(gfi)
+            zatime, zmtime = zstats.st_atime, zstats.st_mtime
+            if zatime == atime and zmtime == mtime:
+                print 'skipping %s, already gzipped to the latest version' % os.path.basename(fi)
+                continue
+        print 'gzipping %s to %s' % (os.path.basename(fi), os.path.basename(gfi))
+        f_in = open(fi, 'rb')
+        f_out = gzip.open(gfi, 'wb')
+        f_out.writelines(f_in)
+        f_out.close()
+        f_in.close()
+        os.utime(gfi, (atime,mtime))
+        saved = fstats.st_size - os.stat(gfi).st_size
+        tsave+= saved
+
+    print 'saved %s KB' % (int(tsave)/1000.0)
+
+if __name__ == '__main__':
+    ALLOWED_EXTS = ['.css', '.js']
+    static_path = os.path.abspath(os.path.join(request.folder, 'static'))
+    filelist = []
+    for root, dir, files in os.walk(static_path):
+        for file in files:
+            filelist.append(os.path.join(root, file))
+
+    zip_static(filelist)