General: Move wal into it's own script.

4 files changed, 594 insertions, 581 deletions

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 032e59c..a81dce8 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -39,6 +39,7 @@ git commit -m "export: Added export format for emacs. Closes #11"
 You can run `pywal` without properly installing it by using the following command:
 
 ```sh
-./pywal/__init__.py
+# From the repo directory.
+python -m pywal
 ```
 
diff --git a/pywal/__init__.py b/pywal/__init__.py
index fb5861b..af433d7 100755..100644
--- a/pywal/__init__.py
+++ b/pywal/__init__.py
@@ -2,583 +2,3 @@
 wal - Generate and change colorschemes on the fly.
 Created by Dylan Araps.
 """
-import argparse
-import os
-import pathlib
-import random
-import re
-import shutil
-import subprocess
-import sys
-
-
-__version__ = "0.1.6"
-
-
-# Internal variables.
-COLOR_COUNT = 16
-CACHE_DIR = pathlib.Path.home() / ".cache/wal/"
-
-
-# pylint: disable=too-few-public-methods
-class ColorType(object):
-    """Store colors in various formats."""
-    plain = []
-    xrdb = []
-    sequences = []
-    shell = []
-    scss = []
-    css = [":root {"]
-    putty = [
-        "Windows Registry Editor Version 5.00",
-        "[HKEY_CURRENT_USER\\Software\\SimonTatham\\PuTTY\\Sessions\\Wal]",
-    ]
-
-
-# pylint: disable=too-few-public-methods
-class Args(object):
-    """Store args."""
-    notify = True
-
-
-# ARGS {{{
-
-
-def get_args():
-    """Get the script arguments."""
-    description = "wal - Generate colorschemes on the fly"
-    arg = argparse.ArgumentParser(description=description)
-
-    # Add the args.
-    arg.add_argument("-c", action="store_true",
-                     help="Delete all cached colorschemes.")
-
-    arg.add_argument("-i", metavar="\"/path/to/img.jpg\"",
-                     help="Which image or directory to use.")
-
-    arg.add_argument("-n", action="store_true",
-                     help="Skip setting the wallpaper.")
-
-    arg.add_argument("-o", metavar="\"script_name\"",
-                     help="External script to run after \"wal\".")
-
-    arg.add_argument("-q", action="store_true",
-                     help="Quiet mode, don\"t print anything and \
-                           don't display notifications.")
-
-    arg.add_argument("-r", action="store_true",
-                     help="Reload current colorscheme.")
-
-    arg.add_argument("-t", action="store_true",
-                     help="Fix artifacts in VTE Terminals. \
-                           (Termite, xfce4-terminal)")
-
-    arg.add_argument("-v", action="store_true",
-                     help="Print \"wal\" version.")
-
-    return arg.parse_args()
-
-
-def process_args(args):
-    """Process args."""
-    # If no args were passed.
-    if not len(sys.argv) > 1:
-        print("error: wal needs to be given arguments to run.\n"
-              "       Refer to \"wal -h\" for more info.")
-        exit(1)
-
-    # -q
-    if args.q:
-        sys.stdout = sys.stderr = open(os.devnull, "w")
-        Args.notify = False
-
-    # -c
-    if args.c:
-        shutil.rmtree(CACHE_DIR / "schemes")
-        create_cache_dir()
-
-    # -r
-    if args.r:
-        reload_colors(args.t)
-
-    # -v
-    if args.v:
-        print(f"wal {__version__}")
-        exit(0)
-
-    # -i
-    if args.i:
-        image = get_image(args.i)
-        ColorType.plain = get_colors(image)
-
-        if not args.n:
-            set_wallpaper(image)
-
-        # Set the colors.
-        send_sequences(ColorType.plain, args.t)
-        export_colors(ColorType.plain)
-
-    # -o
-    if args.o:
-        disown(args.o)
-
-
-# }}}
-
-
-# COLORSCHEME GENERATION {{{
-
-
-def get_image(img):
-    """Validate image input."""
-    # Check if the user has Imagemagick installed.
-    if not shutil.which("convert"):
-        print("error: imagemagick not found, exiting...\n"
-              "error: wal requires imagemagick to function.")
-        exit(1)
-
-    image = pathlib.Path(img)
-
-    if image.is_file():
-        wal_img = image
-
-    # Pick a random image from the directory.
-    elif image.is_dir():
-        file_types = (".png", ".jpg", ".jpeg", ".jpe", ".gif")
-
-        # Get the filename of the current wallpaper.
-        current_img = pathlib.Path(CACHE_DIR / "wal")
-
-        if current_img.is_file():
-            current_img = read_file(current_img)
-            current_img = os.path.basename(current_img[0])
-
-        # Get a list of images.
-        images = [img for img in os.listdir(image)
-                  if img.endswith(file_types) and
-                  img != current_img]
-
-        wal_img = random.choice(images)
-        wal_img = pathlib.Path(image / wal_img)
-
-    else:
-        print("error: No valid image file found.")
-        exit(1)
-
-    print("image: Using image", wal_img)
-    return str(wal_img)
-
-
-def imagemagick(color_count, img):
-    """Call Imagemagick to generate a scheme."""
-    colors = subprocess.Popen(["convert", img, "+dither", "-colors",
-                               str(color_count), "-unique-colors", "txt:-"],
-                              stdout=subprocess.PIPE)
-
-    return colors.stdout.readlines()
-
-
-def gen_colors(img):
-    """Generate a color palette using imagemagick."""
-    # Generate initial scheme.
-    raw_colors = imagemagick(COLOR_COUNT, img)
-
-    # If imagemagick finds less than 16 colors, use a larger source number
-    # of colors.
-    index = 0
-    while len(raw_colors) - 1 < COLOR_COUNT:
-        index += 1
-        raw_colors = imagemagick(COLOR_COUNT + index, img)
-
-        print("colors: Imagemagick couldn't generate a", COLOR_COUNT,
-              "color palette, trying a larger palette size",
-              COLOR_COUNT + index)
-
-    # Remove the first element, which isn't a color.
-    del raw_colors[0]
-
-    # Create a list of hex colors.
-    return [re.search("#.{6}", str(col)).group(0) for col in raw_colors]
-
-
-def get_colors(img):
-    """Generate a colorscheme using imagemagick."""
-    # Cache the wallpaper name.
-    save_file(img, CACHE_DIR / "wal")
-
-    # Cache the sequences file.
-    cache_file = pathlib.Path(CACHE_DIR / "schemes" / img.replace("/", "_"))
-
-    if cache_file.is_file():
-        colors = read_file(cache_file)
-        print("colors: Found cached colorscheme.")
-
-    else:
-        print("colors: Generating a colorscheme...")
-        notify("wal: Generating a colorscheme...")
-
-        # Generate the colors.
-        colors = gen_colors(img)
-        colors = sort_colors(colors)
-
-        # Cache the colorscheme.
-        save_file("\n".join(colors), cache_file)
-
-        print("colors: Generated colorscheme")
-        notify("wal: Generation complete.")
-
-    return colors
-
-
-def sort_colors(colors):
-    """Sort the generated colors."""
-    sorted_colors = []
-    sorted_colors.append(colors[0])
-    sorted_colors.append(colors[9])
-    sorted_colors.append(colors[10])
-    sorted_colors.append(colors[11])
-    sorted_colors.append(colors[12])
-    sorted_colors.append(colors[13])
-    sorted_colors.append(colors[14])
-    sorted_colors.append(colors[15])
-    sorted_colors.append(set_grey(colors))
-    sorted_colors.append(colors[9])
-    sorted_colors.append(colors[10])
-    sorted_colors.append(colors[11])
-    sorted_colors.append(colors[12])
-    sorted_colors.append(colors[13])
-    sorted_colors.append(colors[14])
-    sorted_colors.append(colors[15])
-    return sorted_colors
-
-
-# }}}
-
-
-# SEND SEQUENCES {{{
-
-
-def set_special(index, color):
-    """Build the escape sequence for special colors."""
-    ColorType.sequences.append(f"\\033]{index};{color}\\007")
-
-    if index == 10:
-        ColorType.xrdb.append(f"URxvt*foreground: {color}")
-        ColorType.xrdb.append(f"XTerm*foreground: {color}")
-
-    elif index == 11:
-        ColorType.xrdb.append(f"URxvt*background: {color}")
-        ColorType.xrdb.append(f"XTerm*background: {color}")
-
-    elif index == 12:
-        ColorType.xrdb.append(f"URxvt*cursorColor: {color}")
-        ColorType.xrdb.append(f"XTerm*cursorColor: {color}")
-
-    elif index == 66:
-        ColorType.xrdb.append(f"*.color{index}: {color}")
-        ColorType.xrdb.append(f"*color{index}: {color}")
-        ColorType.sequences.append(f"\\033]4;{index};{color}\\007")
-
-
-def set_color(index, color):
-    """Build the escape sequence we need for each color."""
-    ColorType.xrdb.append(f"*.color{index}: {color}")
-    ColorType.xrdb.append(f"*color{index}: {color}")
-    ColorType.sequences.append(f"\\033]4;{index};{color}\\007")
-    ColorType.shell.append(f"color{index}='{color}'")
-    ColorType.css.append(f"\t--color{index}: {color};")
-    ColorType.scss.append(f"$color{index}: {color};")
-
-    rgb = hex_to_rgb(color)
-    ColorType.putty.append(f"\"Colour{index}\"=\"{rgb}\"")
-
-
-def set_grey(colors):
-    """Set a grey color based on brightness of color0."""
-    return {
-        0: "#666666",
-        1: "#666666",
-        2: "#757575",
-        3: "#999999",
-        4: "#999999",
-        5: "#8a8a8a",
-        6: "#a1a1a1",
-        7: "#a1a1a1",
-        8: "#a1a1a1",
-        9: "#a1a1a1",
-    }.get(int(colors[0][1]), colors[7])
-
-
-def send_sequences(colors, vte):
-    """Send colors to all open terminals."""
-    set_special(10, colors[15])
-    set_special(11, colors[0])
-    set_special(12, colors[15])
-    set_special(13, colors[15])
-    set_special(14, colors[0])
-
-    # This escape sequence doesn"t work in VTE terminals.
-    if not vte:
-        set_special(708, colors[0])
-
-    # Create the sequences.
-    # pylint: disable=W0106
-    [set_color(num, color) for num, color in enumerate(colors)]
-
-    # Set a blank color that isn"t affected by bold highlighting.
-    set_special(66, colors[0])
-
-    # Make the terminal interpret escape sequences.
-    sequences = fix_escape("".join(ColorType.sequences))
-
-    # Get a list of terminals.
-    terminals = [f"/dev/pts/{term}" for term in os.listdir("/dev/pts/")
-                 if len(term) < 4]
-    terminals.append(CACHE_DIR / "sequences")
-
-    # Send the sequences to all open terminals.
-    # pylint: disable=W0106
-    [save_file(sequences, term) for term in terminals]
-
-    print("colors: Set terminal colors")
-
-
-# }}}
-
-
-# WALLPAPER SETTING {{{
-
-
-def get_desktop_env():
-    """Identify the current running desktop environment."""
-    desktop = os.getenv("XDG_CURRENT_DESKTOP")
-    if desktop:
-        return desktop
-
-    desktop = os.getenv("DESKTOP_SESSION")
-    if desktop:
-        return desktop
-
-    desktop = os.getenv("GNOME_DESKTOP_SESSION_ID")
-    if desktop:
-        return "GNOME"
-
-    desktop = os.getenv("MATE_DESKTOP_SESSION_ID")
-    if desktop:
-        return "MATE"
-
-
-def xfconf(path, img):
-    """Call xfconf to set the wallpaper on XFCE."""
-    disown("xfconf-query", "--channel", "xfce4-desktop",
-           "--property", path, "--set", img)
-
-
-def set_desktop_wallpaper(desktop, img):
-    """Set the wallpaper for the desktop environment."""
-    desktop = str(desktop).lower()
-
-    if "xfce" in desktop or "xubuntu" in desktop:
-        # XFCE requires two commands since they differ between versions.
-        xfconf("/backdrop/screen0/monitor0/image-path", img)
-        xfconf("/backdrop/screen0/monitor0/workspace0/last-image", img)
-
-    elif "muffin" in desktop or "cinnamon" in desktop:
-        subprocess.Popen(["gsettings", "set",
-                          "org.cinnamon.desktop.background",
-                          "picture-uri", "file:///" + img])
-
-    elif "gnome" in desktop:
-        subprocess.Popen(["gsettings", "set",
-                          "org.gnome.desktop.background",
-                          "picture-uri", "file:///" + img])
-
-    elif "mate" in desktop:
-        subprocess.Popen(["gsettings", "set", "org.mate.background",
-                          "picture-filename", img])
-
-
-def set_wallpaper(img):
-    """Set the wallpaper."""
-    desktop = get_desktop_env()
-
-    if desktop:
-        set_desktop_wallpaper(desktop, img)
-
-    else:
-        if shutil.which("feh"):
-            subprocess.Popen(["feh", "--bg-fill", img])
-
-        elif shutil.which("nitrogen"):
-            subprocess.Popen(["nitrogen", "--set-zoom-fill", img])
-
-        elif shutil.which("bgs"):
-            subprocess.Popen(["bgs", img])
-
-        elif shutil.which("hsetroot"):
-            subprocess.Popen(["hsetroot", "-fill", img])
-
-        elif shutil.which("habak"):
-            subprocess.Popen(["habak", "-mS", img])
-
-        else:
-            print("error: No wallpaper setter found.")
-            return
-
-    print("wallpaper: Set the new wallpaper")
-    return 0
-
-
-# }}}
-
-
-# EXPORT COLORS {{{
-
-
-def save_colors(colors, export_file, message):
-    """Export colors to var format."""
-    colors = "\n".join(colors)
-    save_file(f"{colors}\n", CACHE_DIR / export_file)
-    print(f"export: exported {message}.")
-
-
-def export_rofi(colors):
-    """Append rofi colors to the x_colors list."""
-    ColorType.xrdb.append(f"rofi.color-window: {colors[0]}, "
-                          f"{colors[0]}, {colors[10]}")
-    ColorType.xrdb.append(f"rofi.color-normal: {colors[0]}, "
-                          f"{colors[15]}, {colors[0]}, "
-                          f"{colors[10]}, {colors[0]}")
-    ColorType.xrdb.append(f"rofi.color-active: {colors[0]}, "
-                          f"{colors[15]}, {colors[0]}, "
-                          f"{colors[10]}, {colors[0]}")
-    ColorType.xrdb.append(f"rofi.color-urgent: {colors[0]}, "
-                          f"{colors[9]}, {colors[0]}, "
-                          f"{colors[9]}, {colors[15]}")
-
-
-def export_emacs(colors):
-    """Set emacs colors."""
-    ColorType.xrdb.append(f"emacs*background: {colors[0]}")
-    ColorType.xrdb.append(f"emacs*foreground: {colors[15]}")
-
-
-def reload_xrdb(export_file):
-    """Merge the colors into the X db so new terminals use them."""
-    if shutil.which("xrdb"):
-        subprocess.call(["xrdb", "-merge", CACHE_DIR / export_file])
-
-
-def reload_i3():
-    """Reload i3 colors."""
-    if shutil.which("i3-msg"):
-        disown("i3-msg", "reload")
-
-
-def export_colors(colors):
-    """Export colors in various formats."""
-    save_colors(ColorType.plain, "colors", "plain hex colors")
-    save_colors(ColorType.shell, "colors.sh", "shell variables")
-
-    # Web based colors.
-    ColorType.css.append("}")
-    save_colors(ColorType.css, "colors.css", "css variables")
-    save_colors(ColorType.scss, "colors.scss", "scss variables")
-
-    # Text editor based colors.
-    save_colors(ColorType.putty, "colors-putty.reg", "putty theme")
-
-    # X based colors.
-    export_rofi(colors)
-    export_emacs(colors)
-    save_colors(ColorType.xrdb, "xcolors", "xrdb colors")
-
-    # i3 colors.
-    reload_xrdb("xcolors")
-    reload_i3()
-
-
-# }}}
-
-
-# OTHER FUNCTIONS {{{
-
-
-def reload_colors(vte):
-    """Reload colors."""
-    sequence_file = pathlib.Path(CACHE_DIR / "sequences")
-
-    if sequence_file.is_file():
-        sequences = "".join(read_file(sequence_file))
-
-        # If vte mode was used, remove the problem sequence.
-        if vte:
-            sequences = re.sub(r"\]708;\#.{6}", "", sequences)
-
-        # Make the terminal interpret escape sequences.
-        print(fix_escape(sequences), end="")
-
-    exit(0)
-
-
-def read_file(input_file):
-    """Read colors from a file."""
-    return open(input_file).read().splitlines()
-
-
-def save_file(colors, export_file):
-    """Write the colors to the file."""
-    with open(export_file, "w") as file:
-        file.write(colors)
-
-
-def create_cache_dir():
-    """Alias to create the cache dir."""
-    pathlib.Path(CACHE_DIR / "schemes").mkdir(parents=True, exist_ok=True)
-
-
-def hex_to_rgb(color):
-    """Convert a hex color to rgb."""
-    red, green, blue = list(bytes.fromhex(color.strip("#")))
-    return f"{red},{green},{blue}"
-
-
-def fix_escape(string):
-    """Decode a string."""
-    return bytes(string, "utf-8").decode("unicode_escape")
-
-
-def notify(msg):
-    """Send arguements to notify-send."""
-    if shutil.which("notify-send") and Args.notify:
-        subprocess.Popen(["notify-send", msg],
-                         stdout=subprocess.DEVNULL,
-                         stderr=subprocess.DEVNULL,
-                         preexec_fn=os.setpgrp)
-
-
-def disown(*cmd):
-    """Call a system command in the background,
-       disown it and hide it's output."""
-    subprocess.Popen(["nohup"] + list(cmd),
-                     stdout=subprocess.DEVNULL,
-                     stderr=subprocess.DEVNULL,
-                     preexec_fn=os.setpgrp)
-
-
-# }}}
-
-
-def main():
-    """Main script function."""
-    create_cache_dir()
-    args = get_args()
-    process_args(args)
-
-    # This saves 10ms.
-    # pylint: disable=W0212
-    # os._exit(0)
-
-
-if __name__ == "__main__":
-    main()
diff --git a/pywal/__main__.py b/pywal/__main__.py
new file mode 100644
index 0000000..4781f8f
--- /dev/null
+++ b/pywal/__main__.py
@@ -0,0 +1,8 @@
+"""
+wal - Generate and change colorschemes on the fly.
+Created by Dylan Araps.
+"""
+from pywal.wal import main
+
+
+main()
diff --git a/pywal/wal.py b/pywal/wal.py
new file mode 100755
index 0000000..fb5861b
--- /dev/null
+++ b/pywal/wal.py
@@ -0,0 +1,584 @@
+"""
+wal - Generate and change colorschemes on the fly.
+Created by Dylan Araps.
+"""
+import argparse
+import os
+import pathlib
+import random
+import re
+import shutil
+import subprocess
+import sys
+
+
+__version__ = "0.1.6"
+
+
+# Internal variables.
+COLOR_COUNT = 16
+CACHE_DIR = pathlib.Path.home() / ".cache/wal/"
+
+
+# pylint: disable=too-few-public-methods
+class ColorType(object):
+    """Store colors in various formats."""
+    plain = []
+    xrdb = []
+    sequences = []
+    shell = []
+    scss = []
+    css = [":root {"]
+    putty = [
+        "Windows Registry Editor Version 5.00",
+        "[HKEY_CURRENT_USER\\Software\\SimonTatham\\PuTTY\\Sessions\\Wal]",
+    ]
+
+
+# pylint: disable=too-few-public-methods
+class Args(object):
+    """Store args."""
+    notify = True
+
+
+# ARGS {{{
+
+
+def get_args():
+    """Get the script arguments."""
+    description = "wal - Generate colorschemes on the fly"
+    arg = argparse.ArgumentParser(description=description)
+
+    # Add the args.
+    arg.add_argument("-c", action="store_true",
+                     help="Delete all cached colorschemes.")
+
+    arg.add_argument("-i", metavar="\"/path/to/img.jpg\"",
+                     help="Which image or directory to use.")
+
+    arg.add_argument("-n", action="store_true",
+                     help="Skip setting the wallpaper.")
+
+    arg.add_argument("-o", metavar="\"script_name\"",
+                     help="External script to run after \"wal\".")
+
+    arg.add_argument("-q", action="store_true",
+                     help="Quiet mode, don\"t print anything and \
+                           don't display notifications.")
+
+    arg.add_argument("-r", action="store_true",
+                     help="Reload current colorscheme.")
+
+    arg.add_argument("-t", action="store_true",
+                     help="Fix artifacts in VTE Terminals. \
+                           (Termite, xfce4-terminal)")
+
+    arg.add_argument("-v", action="store_true",
+                     help="Print \"wal\" version.")
+
+    return arg.parse_args()
+
+
+def process_args(args):
+    """Process args."""
+    # If no args were passed.
+    if not len(sys.argv) > 1:
+        print("error: wal needs to be given arguments to run.\n"
+              "       Refer to \"wal -h\" for more info.")
+        exit(1)
+
+    # -q
+    if args.q:
+        sys.stdout = sys.stderr = open(os.devnull, "w")
+        Args.notify = False
+
+    # -c
+    if args.c:
+        shutil.rmtree(CACHE_DIR / "schemes")
+        create_cache_dir()
+
+    # -r
+    if args.r:
+        reload_colors(args.t)
+
+    # -v
+    if args.v:
+        print(f"wal {__version__}")
+        exit(0)
+
+    # -i
+    if args.i:
+        image = get_image(args.i)
+        ColorType.plain = get_colors(image)
+
+        if not args.n:
+            set_wallpaper(image)
+
+        # Set the colors.
+        send_sequences(ColorType.plain, args.t)
+        export_colors(ColorType.plain)
+
+    # -o
+    if args.o:
+        disown(args.o)
+
+
+# }}}
+
+
+# COLORSCHEME GENERATION {{{
+
+
+def get_image(img):
+    """Validate image input."""
+    # Check if the user has Imagemagick installed.
+    if not shutil.which("convert"):
+        print("error: imagemagick not found, exiting...\n"
+              "error: wal requires imagemagick to function.")
+        exit(1)
+
+    image = pathlib.Path(img)
+
+    if image.is_file():
+        wal_img = image
+
+    # Pick a random image from the directory.
+    elif image.is_dir():
+        file_types = (".png", ".jpg", ".jpeg", ".jpe", ".gif")
+
+        # Get the filename of the current wallpaper.
+        current_img = pathlib.Path(CACHE_DIR / "wal")
+
+        if current_img.is_file():
+            current_img = read_file(current_img)
+            current_img = os.path.basename(current_img[0])
+
+        # Get a list of images.
+        images = [img for img in os.listdir(image)
+                  if img.endswith(file_types) and
+                  img != current_img]
+
+        wal_img = random.choice(images)
+        wal_img = pathlib.Path(image / wal_img)
+
+    else:
+        print("error: No valid image file found.")
+        exit(1)
+
+    print("image: Using image", wal_img)
+    return str(wal_img)
+
+
+def imagemagick(color_count, img):
+    """Call Imagemagick to generate a scheme."""
+    colors = subprocess.Popen(["convert", img, "+dither", "-colors",
+                               str(color_count), "-unique-colors", "txt:-"],
+                              stdout=subprocess.PIPE)
+
+    return colors.stdout.readlines()
+
+
+def gen_colors(img):
+    """Generate a color palette using imagemagick."""
+    # Generate initial scheme.
+    raw_colors = imagemagick(COLOR_COUNT, img)
+
+    # If imagemagick finds less than 16 colors, use a larger source number
+    # of colors.
+    index = 0
+    while len(raw_colors) - 1 < COLOR_COUNT:
+        index += 1
+        raw_colors = imagemagick(COLOR_COUNT + index, img)
+
+        print("colors: Imagemagick couldn't generate a", COLOR_COUNT,
+              "color palette, trying a larger palette size",
+              COLOR_COUNT + index)
+
+    # Remove the first element, which isn't a color.
+    del raw_colors[0]
+
+    # Create a list of hex colors.
+    return [re.search("#.{6}", str(col)).group(0) for col in raw_colors]
+
+
+def get_colors(img):
+    """Generate a colorscheme using imagemagick."""
+    # Cache the wallpaper name.
+    save_file(img, CACHE_DIR / "wal")
+
+    # Cache the sequences file.
+    cache_file = pathlib.Path(CACHE_DIR / "schemes" / img.replace("/", "_"))
+
+    if cache_file.is_file():
+        colors = read_file(cache_file)
+        print("colors: Found cached colorscheme.")
+
+    else:
+        print("colors: Generating a colorscheme...")
+        notify("wal: Generating a colorscheme...")
+
+        # Generate the colors.
+        colors = gen_colors(img)
+        colors = sort_colors(colors)
+
+        # Cache the colorscheme.
+        save_file("\n".join(colors), cache_file)
+
+        print("colors: Generated colorscheme")
+        notify("wal: Generation complete.")
+
+    return colors
+
+
+def sort_colors(colors):
+    """Sort the generated colors."""
+    sorted_colors = []
+    sorted_colors.append(colors[0])
+    sorted_colors.append(colors[9])
+    sorted_colors.append(colors[10])
+    sorted_colors.append(colors[11])
+    sorted_colors.append(colors[12])
+    sorted_colors.append(colors[13])
+    sorted_colors.append(colors[14])
+    sorted_colors.append(colors[15])
+    sorted_colors.append(set_grey(colors))
+    sorted_colors.append(colors[9])
+    sorted_colors.append(colors[10])
+    sorted_colors.append(colors[11])
+    sorted_colors.append(colors[12])
+    sorted_colors.append(colors[13])
+    sorted_colors.append(colors[14])
+    sorted_colors.append(colors[15])
+    return sorted_colors
+
+
+# }}}
+
+
+# SEND SEQUENCES {{{
+
+
+def set_special(index, color):
+    """Build the escape sequence for special colors."""
+    ColorType.sequences.append(f"\\033]{index};{color}\\007")
+
+    if index == 10:
+        ColorType.xrdb.append(f"URxvt*foreground: {color}")
+        ColorType.xrdb.append(f"XTerm*foreground: {color}")
+
+    elif index == 11:
+        ColorType.xrdb.append(f"URxvt*background: {color}")
+        ColorType.xrdb.append(f"XTerm*background: {color}")
+
+    elif index == 12:
+        ColorType.xrdb.append(f"URxvt*cursorColor: {color}")
+        ColorType.xrdb.append(f"XTerm*cursorColor: {color}")
+
+    elif index == 66:
+        ColorType.xrdb.append(f"*.color{index}: {color}")
+        ColorType.xrdb.append(f"*color{index}: {color}")
+        ColorType.sequences.append(f"\\033]4;{index};{color}\\007")
+
+
+def set_color(index, color):
+    """Build the escape sequence we need for each color."""
+    ColorType.xrdb.append(f"*.color{index}: {color}")
+    ColorType.xrdb.append(f"*color{index}: {color}")
+    ColorType.sequences.append(f"\\033]4;{index};{color}\\007")
+    ColorType.shell.append(f"color{index}='{color}'")
+    ColorType.css.append(f"\t--color{index}: {color};")
+    ColorType.scss.append(f"$color{index}: {color};")
+
+    rgb = hex_to_rgb(color)
+    ColorType.putty.append(f"\"Colour{index}\"=\"{rgb}\"")
+
+
+def set_grey(colors):
+    """Set a grey color based on brightness of color0."""
+    return {
+        0: "#666666",
+        1: "#666666",
+        2: "#757575",
+        3: "#999999",
+        4: "#999999",
+        5: "#8a8a8a",
+        6: "#a1a1a1",
+        7: "#a1a1a1",
+        8: "#a1a1a1",
+        9: "#a1a1a1",
+    }.get(int(colors[0][1]), colors[7])
+
+
+def send_sequences(colors, vte):
+    """Send colors to all open terminals."""
+    set_special(10, colors[15])
+    set_special(11, colors[0])
+    set_special(12, colors[15])
+    set_special(13, colors[15])
+    set_special(14, colors[0])
+
+    # This escape sequence doesn"t work in VTE terminals.
+    if not vte:
+        set_special(708, colors[0])
+
+    # Create the sequences.
+    # pylint: disable=W0106
+    [set_color(num, color) for num, color in enumerate(colors)]
+
+    # Set a blank color that isn"t affected by bold highlighting.
+    set_special(66, colors[0])
+
+    # Make the terminal interpret escape sequences.
+    sequences = fix_escape("".join(ColorType.sequences))
+
+    # Get a list of terminals.
+    terminals = [f"/dev/pts/{term}" for term in os.listdir("/dev/pts/")
+                 if len(term) < 4]
+    terminals.append(CACHE_DIR / "sequences")
+
+    # Send the sequences to all open terminals.
+    # pylint: disable=W0106
+    [save_file(sequences, term) for term in terminals]
+
+    print("colors: Set terminal colors")
+
+
+# }}}
+
+
+# WALLPAPER SETTING {{{
+
+
+def get_desktop_env():
+    """Identify the current running desktop environment."""
+    desktop = os.getenv("XDG_CURRENT_DESKTOP")
+    if desktop:
+        return desktop
+
+    desktop = os.getenv("DESKTOP_SESSION")
+    if desktop:
+        return desktop
+
+    desktop = os.getenv("GNOME_DESKTOP_SESSION_ID")
+    if desktop:
+        return "GNOME"
+
+    desktop = os.getenv("MATE_DESKTOP_SESSION_ID")
+    if desktop:
+        return "MATE"
+
+
+def xfconf(path, img):
+    """Call xfconf to set the wallpaper on XFCE."""
+    disown("xfconf-query", "--channel", "xfce4-desktop",
+           "--property", path, "--set", img)
+
+
+def set_desktop_wallpaper(desktop, img):
+    """Set the wallpaper for the desktop environment."""
+    desktop = str(desktop).lower()
+
+    if "xfce" in desktop or "xubuntu" in desktop:
+        # XFCE requires two commands since they differ between versions.
+        xfconf("/backdrop/screen0/monitor0/image-path", img)
+        xfconf("/backdrop/screen0/monitor0/workspace0/last-image", img)
+
+    elif "muffin" in desktop or "cinnamon" in desktop:
+        subprocess.Popen(["gsettings", "set",
+                          "org.cinnamon.desktop.background",
+                          "picture-uri", "file:///" + img])
+
+    elif "gnome" in desktop:
+        subprocess.Popen(["gsettings", "set",
+                          "org.gnome.desktop.background",
+                          "picture-uri", "file:///" + img])
+
+    elif "mate" in desktop:
+        subprocess.Popen(["gsettings", "set", "org.mate.background",
+                          "picture-filename", img])
+
+
+def set_wallpaper(img):
+    """Set the wallpaper."""
+    desktop = get_desktop_env()
+
+    if desktop:
+        set_desktop_wallpaper(desktop, img)
+
+    else:
+        if shutil.which("feh"):
+            subprocess.Popen(["feh", "--bg-fill", img])
+
+        elif shutil.which("nitrogen"):
+            subprocess.Popen(["nitrogen", "--set-zoom-fill", img])
+
+        elif shutil.which("bgs"):
+            subprocess.Popen(["bgs", img])
+
+        elif shutil.which("hsetroot"):
+            subprocess.Popen(["hsetroot", "-fill", img])
+
+        elif shutil.which("habak"):
+            subprocess.Popen(["habak", "-mS", img])
+
+        else:
+            print("error: No wallpaper setter found.")
+            return
+
+    print("wallpaper: Set the new wallpaper")
+    return 0
+
+
+# }}}
+
+
+# EXPORT COLORS {{{
+
+
+def save_colors(colors, export_file, message):
+    """Export colors to var format."""
+    colors = "\n".join(colors)
+    save_file(f"{colors}\n", CACHE_DIR / export_file)
+    print(f"export: exported {message}.")
+
+
+def export_rofi(colors):
+    """Append rofi colors to the x_colors list."""
+    ColorType.xrdb.append(f"rofi.color-window: {colors[0]}, "
+                          f"{colors[0]}, {colors[10]}")
+    ColorType.xrdb.append(f"rofi.color-normal: {colors[0]}, "
+                          f"{colors[15]}, {colors[0]}, "
+                          f"{colors[10]}, {colors[0]}")
+    ColorType.xrdb.append(f"rofi.color-active: {colors[0]}, "
+                          f"{colors[15]}, {colors[0]}, "
+                          f"{colors[10]}, {colors[0]}")
+    ColorType.xrdb.append(f"rofi.color-urgent: {colors[0]}, "
+                          f"{colors[9]}, {colors[0]}, "
+                          f"{colors[9]}, {colors[15]}")
+
+
+def export_emacs(colors):
+    """Set emacs colors."""
+    ColorType.xrdb.append(f"emacs*background: {colors[0]}")
+    ColorType.xrdb.append(f"emacs*foreground: {colors[15]}")
+
+
+def reload_xrdb(export_file):
+    """Merge the colors into the X db so new terminals use them."""
+    if shutil.which("xrdb"):
+        subprocess.call(["xrdb", "-merge", CACHE_DIR / export_file])
+
+
+def reload_i3():
+    """Reload i3 colors."""
+    if shutil.which("i3-msg"):
+        disown("i3-msg", "reload")
+
+
+def export_colors(colors):
+    """Export colors in various formats."""
+    save_colors(ColorType.plain, "colors", "plain hex colors")
+    save_colors(ColorType.shell, "colors.sh", "shell variables")
+
+    # Web based colors.
+    ColorType.css.append("}")
+    save_colors(ColorType.css, "colors.css", "css variables")
+    save_colors(ColorType.scss, "colors.scss", "scss variables")
+
+    # Text editor based colors.
+    save_colors(ColorType.putty, "colors-putty.reg", "putty theme")
+
+    # X based colors.
+    export_rofi(colors)
+    export_emacs(colors)
+    save_colors(ColorType.xrdb, "xcolors", "xrdb colors")
+
+    # i3 colors.
+    reload_xrdb("xcolors")
+    reload_i3()
+
+
+# }}}
+
+
+# OTHER FUNCTIONS {{{
+
+
+def reload_colors(vte):
+    """Reload colors."""
+    sequence_file = pathlib.Path(CACHE_DIR / "sequences")
+
+    if sequence_file.is_file():
+        sequences = "".join(read_file(sequence_file))
+
+        # If vte mode was used, remove the problem sequence.
+        if vte:
+            sequences = re.sub(r"\]708;\#.{6}", "", sequences)
+
+        # Make the terminal interpret escape sequences.
+        print(fix_escape(sequences), end="")
+
+    exit(0)
+
+
+def read_file(input_file):
+    """Read colors from a file."""
+    return open(input_file).read().splitlines()
+
+
+def save_file(colors, export_file):
+    """Write the colors to the file."""
+    with open(export_file, "w") as file:
+        file.write(colors)
+
+
+def create_cache_dir():
+    """Alias to create the cache dir."""
+    pathlib.Path(CACHE_DIR / "schemes").mkdir(parents=True, exist_ok=True)
+
+
+def hex_to_rgb(color):
+    """Convert a hex color to rgb."""
+    red, green, blue = list(bytes.fromhex(color.strip("#")))
+    return f"{red},{green},{blue}"
+
+
+def fix_escape(string):
+    """Decode a string."""
+    return bytes(string, "utf-8").decode("unicode_escape")
+
+
+def notify(msg):
+    """Send arguements to notify-send."""
+    if shutil.which("notify-send") and Args.notify:
+        subprocess.Popen(["notify-send", msg],
+                         stdout=subprocess.DEVNULL,
+                         stderr=subprocess.DEVNULL,
+                         preexec_fn=os.setpgrp)
+
+
+def disown(*cmd):
+    """Call a system command in the background,
+       disown it and hide it's output."""
+    subprocess.Popen(["nohup"] + list(cmd),
+                     stdout=subprocess.DEVNULL,
+                     stderr=subprocess.DEVNULL,
+                     preexec_fn=os.setpgrp)
+
+
+# }}}
+
+
+def main():
+    """Main script function."""
+    create_cache_dir()
+    args = get_args()
+    process_args(args)
+
+    # This saves 10ms.
+    # pylint: disable=W0212
+    # os._exit(0)
+
+
+if __name__ == "__main__":
+    main()