Add script to apply a tilix colorscheme file. (#524)

scripts/apply-tilix-colorscheme.py

@@ -0,0 +1,112 @@
+#!/usr/bin/env python3
+
+import collections
+import logging
+import shutil
+import json
+import sys
+import os
+
+import yaml
+
+log = logging.getLogger(__name__)
+
+XDG_CONFIG_HOME = os.environ.get('XDG_CONFIG_HOME', os.path.expanduser('~/.config'))
+ALACONF_FN = os.path.join(XDG_CONFIG_HOME, 'alacritty', 'alacritty.yml')
+
+Palette = collections.namedtuple('Pallete', ['black', 'red', 'green', 'yellow', 'blue', 'magenta', 'cyan', 'white'])
+
+
+class AttrDict(dict):
+    """
+    >>> m = AttrDict(omg=True, whoa='yes')
+    """
+
+    def __init__(self, *args, **kwargs):
+        super(AttrDict, self).__init__(*args, **kwargs)
+        self.__dict__ = self
+
+
+def slurp_yaml(fn):
+    with open(fn, 'r') as fh:
+        # JSON is a subset of YAML.
+        contents = yaml.load(fh)
+    return contents
+
+
+def fixup_hex_color(*args):
+    for arg in args:
+        val = '0x%s' % arg.strip('#')
+        yield val
+
+
+def convert(tilix_scheme):
+    j = AttrDict(tilix_scheme)
+    palette = list(fixup_hex_color(*j.palette))
+
+    pal_normal = Palette(*palette[:8])
+    pal_bold = Palette(*palette[8:])
+
+    colors = {
+        'primary': dict(zip(
+            ['background', 'foreground'],
+            fixup_hex_color(j['background-color'], j['foreground-color']),
+        )),
+        'cursor': dict(zip(
+            ['text', 'cursor'],
+            fixup_hex_color(j['cursor-background-color'], j['cursor-foreground-color']),
+        )),
+        'normal': dict(pal_normal._asdict()),
+        'bright': dict(pal_bold._asdict()),
+    }
+
+    return colors
+
+
+def patch_alaconf_colors(colors, alaconf_fn=ALACONF_FN):
+    with open(alaconf_fn, 'r') as fh:
+        ac_raw = fh.read()
+
+    # Write config file taking care to not remove delicious comments.
+    # Sure, it's janky, but less so than losing comments.
+    skipping = False
+    lines = []
+    for line in ac_raw.splitlines():
+        if skipping:
+            if line and line[0].isalpha():
+                skipping = False
+
+        elif line.startswith('colors:'):
+            skipping = True
+
+        if not skipping:
+            if not line and lines and not lines[-1]:
+                continue
+            lines.append(line)
+
+    temp_fn = '%s.tmp' % alaconf_fn
+    backup_fn = '%s.bak' % alaconf_fn
+
+    with open(temp_fn, 'w') as fh:
+        fh.write('\n'.join(lines))
+        fh.write('\n')
+        yaml.safe_dump(dict(colors=colors), fh)
+
+    shutil.copyfile(alaconf_fn, backup_fn)
+    os.rename(temp_fn, alaconf_fn)
+
+
+def main(argv=sys.argv):
+    if len(argv) != 2:
+        print("Usage: %s TILIX_SCHEME_JSON_FILE" % sys.executable, file=sys.stderr)
+        sys.exit(1)
+
+    fn = argv[1]
+
+    tilix_scheme = slurp_yaml(fn)
+    colors = convert(tilix_scheme)
+    patch_alaconf_colors(colors)
+
+
+if __name__ == '__main__':
+    main()