support/scripts/size-stats: avoid divide-by-zero

Some packages (ex: skeleton-init-systemd) have a zero size so we cannot
divide by the package size. In that case make their percent zero
explicitly and avoid a ZeroDivisionError exception.

Signed-off-by: Andrey Yurovsky <[email protected]>
Acked-by: "Yann E. MORIN" <[email protected]>
Signed-off-by: Thomas Petazzoni <[email protected]>

Author: yurovsky

support/scripts/size-stats

@@ -178,9 +178,17 @@ def gen_files_csv(filesdict, pkgsizes, outputf):
                      "File size in system (%)"])
         for f, (pkgname, filesize) in filesdict.items():
             pkgsize = pkgsizes[pkgname]
+
+            if pkgsize == 0:
+                percent_pkg = 0
+            else:
+                percent_pkg = float(filesize) / pkgsize * 100
+
+            percent_total = float(filesize) / total * 100
+
             wr.writerow([f, pkgname, filesize, pkgsize,
-                         "%.1f" % (float(filesize) / pkgsize * 100),
-                         "%.1f" % (float(filesize) / total * 100)])
+                         "%.1f" % percent_pkg,
+                         "%.1f" % percent_total])
 
 
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