Takes a given font and changes the font family/wws family names to "Cantarell"

generate-fake-cantarell.sh

#!/usr/bin/env fontforge
# vim: set sts=4 sw=4 et :
#
# Takes a given font and changes the font family/wws family names to "Cantarell"
# Created for testing GNOME's move away from Cantarell as the UI font

fontname_prefix = "Cantarell"

if ($version < "20080330")
    Error("Your version of FontForge is too old - 20080330 or newer is required");
endif

SetPref("FoundryName", fontname_prefix)
SetPref("TTFFoundry", fontname_prefix)

i = 1
while (i < $argc)
    Open($argv[i], 1)
    # Get "Regular" or "Bold" out of a font name like SourceSansPro-Regular
    font_style = StrSplit($fontname, "-")
    # Array-indexing doesn't seem to work unless done to a named variable, so we
    # need this extra step.
    old_fontname = font_style[0]
    font_style = font_style[1]
    # Note: StrJoin doesn't actually work the way you would expect.
    # 	    StrJoin(["a", "b"], "-") will give "a-b-" instead of "a-b"
    # Set the new font name, ex: "Cantarell-Regular"
    output_filename = StrJoin([old_fontname, "--", fontname_prefix, "-", font_style], "")
    new_fontname = StrJoin([fontname_prefix, "-", font_style], "")
    # Set the new family name, ex: "Cantarell Regular"
    new_fullname = StrJoin([fontname_prefix, " ", font_style], "")
    # This will set name table name ID 1, 16, 17, 18
    SetFontNames(new_fontname, fontname_prefix, new_fullname)
    # Set the WWS font family name
    SetTTFName(0x409, 21, fontname_prefix)
    # Set newer version
    SetTTFName(0x409, 5, "0.1.0")
    SavePrefs()
    Generate(output_filename + ".otf")
    Close()
    i++
endloop