Resize firefox symbol and prevent symbol with height > 70

.travis.yml

@@ -3,5 +3,6 @@ python:
 - '3.4'
 install:
 - pip install -rrequirements.txt
+- apt-get install imagemagick
 script:
 - python check.py

check.py

@@ -19,6 +19,7 @@ import os
 import jsonschema
 import json
 import sys
+import subprocess
 
 def check_schema(appliance):
     with open('schemas/appliance.json') as f:
@@ -45,6 +46,10 @@ def check_symbol(symbol):
     if not os.path.exists(licence_file):
         print("Missing licence {} for {}".format(licence_file, symbol))
         sys.exit(1)
+    height = int(subprocess.check_output(['identify', '-format', '%h', os.path.join('symbols', symbol)], shell=False))
+    if height > 70:
+        print("Symbol height of {} is too big {} > 70".format(symbol, height))
+        sys.exit(1)
 
 
 def main():

symbols/README.rst

@@ -8,4 +8,25 @@ Rules
 
 * All symbols must be provided as a SVG file
 * A file named symbol.txt should exist and contain symbol licence
-* Try top keep a small file size
+* Try to keep a small file size
+* Max height 70px unless you have a specific reason
+
+
+Resize a svg
+============
+
+If the height of your SVG is too big. You can resize it with
+a tools understanding SVG.
+
+For imagemagick you need a version with rsvg (often it's OK on Linux).
+For installating it  on mac with Homebrew:
+
+```
+brew install imagemagick --with-librsvg
+```
+
+For resizing with a height of 70:
+
+```
+convert symbols/firefox.svg -resize x70 firefox.svg
+```