software/seleniumserver,seleniumrunner: workaround firefox >= 60 font issue

This makes firefox 60 and 68 able to load some fonts and fixes the issue
that fonts were rendered as garbled text

component/firefox/buildout.cfg

@@ -162,7 +162,8 @@ install =
   url, md5sum = options[guessPlatform()].split()
   extract_dir = self.extract(self.download(url, md5sum))
   self.copyTree(guessworkdir(extract_dir), location)
-
+  ${:post-install}
+post-install =
 
 [geckodriver]
 # Current geckodriver installed as ${buildout:bin-directory}/geckodriver

software/seleniumrunner/software.cfg

@@ -11,6 +11,7 @@ extends =
    ../../component/firefox/buildout.cfg
    ../../component/ffmpeg/buildout.cfg
    ../../component/coreutils/buildout.cfg
+   ../../component/fonts/buildout.cfg
    ../../stack/slapos.cfg
    ./buildout.hash.cfg
 
@@ -22,6 +23,27 @@ parts =
    firefox-wrapper
    geckodriver
 
+# XXX firefox 68 does not seem to honor <dir> from fontconfig's
+# fonts.conf and only loads from system locations and from the
+# fonts folder located in firefox part, so we copy (actually, symlink)
+# some fonts there, otherwise firefox cannot find its standard fonts.
+[symlink-extra-fonts-to-firefox-fonts-dir]
+extra-fonts =
+  ${android-fonts:location}
+  ${dejavu-fonts:location}
+  ${ipa-fonts:location}
+  ${ipaex-fonts:location}
+  ${liberation-fonts:location}
+  ${ocrb-fonts:location}
+install =
+  import os
+  for extra_font_dir in '''${:extra-fonts}'''.splitlines():
+    dst = os.path.join(location, 'fonts', os.path.basename(extra_font_dir))
+    os.symlink(extra_font_dir, dst)
+
+[firefox]
+post-install =
+  ${symlink-extra-fonts-to-firefox-fonts-dir:install}
 
 [macro-template]
 recipe = slapos.recipe.template

software/seleniumserver/software.cfg

@@ -44,6 +44,33 @@ output = ${buildout:directory}/template.cfg
 <= macro-template
 output = ${buildout:directory}/template-selenium.cfg
 
+
+# XXX firefox 62 and firefox 68 does not seem to honor <dir> from
+# fonts.conf and only loads from system locations and from the fonts
+# folder located in firefox part, so we copy (actually, symlink) some
+# fonts there, otherwise firefox cannot find its standard fonts.
+[symlink-extra-fonts-to-firefox-fonts-dir]
+extra-fonts =
+  ${android-fonts:location}
+  ${dejavu-fonts:location}
+  ${ipa-fonts:location}
+  ${ipaex-fonts:location}
+  ${liberation-fonts:location}
+  ${ocrb-fonts:location}
+install =
+  import os
+  for extra_font_dir in '''${:extra-fonts}'''.splitlines():
+    dst = os.path.join(location, 'fonts', os.path.basename(extra_font_dir))
+    os.symlink(extra_font_dir, dst)
+
+[firefox-60]
+post-install =
+  ${symlink-extra-fonts-to-firefox-fonts-dir:install}
+
+[firefox-68]
+post-install =
+  ${symlink-extra-fonts-to-firefox-fonts-dir:install}
+
 [versions]
 plone.recipe.command = 1.1
 slapos.recipe.template = 4.4