Merge pull request #216 from dylanaraps/logging

general: Added logging.

15 files changed, 63 insertions, 40 deletions

diff --git a/pywal/__main__.py b/pywal/__main__.py
index c1c4002..866f6ba 100644
--- a/pywal/__main__.py
+++ b/pywal/__main__.py
@@ -173,6 +173,7 @@ def process_args(args):
 
 def main():
     """Main script function."""
+    util.setup_logging()
     args = get_args(sys.argv[1:])
     process_args(args)
 
diff --git a/pywal/backends/colorthief.py b/pywal/backends/colorthief.py
index 180af5f..7b2e2bc 100644
--- a/pywal/backends/colorthief.py
+++ b/pywal/backends/colorthief.py
@@ -1,14 +1,15 @@
 """
 Generate a colorscheme using ColorThief.
 """
+import logging
 import sys
 
 try:
     from colorthief import ColorThief
 
 except ImportError:
-    print("error: ColorThief wasn't found on your system.",
-          "Try another backend. (wal --backend)")
+    logging.error("ColorThief wasn't found on your system.")
+    logging.error("Try another backend. (wal --backend)")
     sys.exit(1)
 
 from .. import util
@@ -25,13 +26,12 @@ def gen_colors(img):
             break
 
         elif i == 19:
-            print("colors: ColorThief couldn't generate a suitable palette",
-                  "for the image. Exiting...")
+            logging.error("ColorThief couldn't generate a suitable palette.")
             sys.exit(1)
 
         else:
-            print("colors: ColorThief couldn't create a suitable palette, "
-                  "trying a larger palette size", 8 + i)
+            logging.warning("ColorThief couldn't generate a palette.")
+            logging.warning("Trying a larger palette size %s", 8 + i)
 
     return [util.rgb_to_hex(color) for color in raw_colors]
 
diff --git a/pywal/backends/colorz.py b/pywal/backends/colorz.py
index 0c5148d..490f585 100644
--- a/pywal/backends/colorz.py
+++ b/pywal/backends/colorz.py
@@ -1,6 +1,7 @@
 """
 Generate a colorscheme using Colorz.
 """
+import logging
 import shutil
 import subprocess
 import sys
@@ -28,8 +29,8 @@ def adjust(cols, light):
 def get(img, light=False):
     """Get colorscheme."""
     if not shutil.which("colorz"):
-        print("error: Colorz wasn't found on your system.",
-              "Try another backend. (wal --backend)")
+        logging.error("Colorz wasn't found on your system.")
+        logging.error("Try another backend. (wal --backend)")
         sys.exit(1)
 
     cols = [col.decode('UTF-8').split()[0] for col in gen_colors(img)]
diff --git a/pywal/backends/haishoku.py b/pywal/backends/haishoku.py
index 413c9d7..00025b2 100644
--- a/pywal/backends/haishoku.py
+++ b/pywal/backends/haishoku.py
@@ -1,14 +1,15 @@
 """
 Generate a colorscheme using Haishoku.
 """
+import logging
 import sys
 
 try:
     from haishoku.haishoku import Haishoku
 
 except ImportError:
-    print("error: Haishoku wasn't found on your system.",
-          "Try another backend. (wal --backend)")
+    logging.error("Haishoku wasn't found on your system.")
+    logging.error("Try another backend. (wal --backend)")
     sys.exit(1)
 
 from .. import colors
diff --git a/pywal/backends/schemer2.py b/pywal/backends/schemer2.py
index 87873ec..adae650 100644
--- a/pywal/backends/schemer2.py
+++ b/pywal/backends/schemer2.py
@@ -1,6 +1,7 @@
 """
 Generate a colorscheme using Schemer2.
 """
+import logging
 import shutil
 import subprocess
 import sys
@@ -26,8 +27,8 @@ def adjust(cols, light):
 def get(img, light=False):
     """Get colorscheme."""
     if not shutil.which("schemer2"):
-        print("error: Schemer2 wasn't found on your system.",
-              "Try another backend. (wal --backend)")
+        logging.error("Schemer2 wasn't found on your system.")
+        logging.error("Try another backend. (wal --backend)")
         sys.exit(1)
 
     cols = [col.decode('UTF-8') for col in gen_colors(img)]
diff --git a/pywal/backends/wal.py b/pywal/backends/wal.py
index 678c66c..cd13092 100644
--- a/pywal/backends/wal.py
+++ b/pywal/backends/wal.py
@@ -1,6 +1,7 @@
 """
 Generate a colorscheme using imagemagick.
 """
+import logging
 import re
 import shutil
 import subprocess
@@ -26,8 +27,8 @@ def has_im():
     elif shutil.which("convert"):
         return ["convert"]
 
-    print("error: ImageMagick wasn't found on your system.",
-          "Try another backend. (wal --backend)")
+    logging.error("Imagemagick wasn't found on your system.")
+    logging.error("Try another backend. (wal --backend)")
     sys.exit(1)
 
 
@@ -43,13 +44,12 @@ def gen_colors(img):
             break
 
         elif i == 19:
-            print("colors: Imagemagick couldn't generate a suitable palette",
-                  "for the image. Exiting...")
+            logging.error("Imagemagick couldn't generate a suitable palette.")
             sys.exit(1)
 
         else:
-            print("colors: Imagemagick couldn't generate a suitable palette, "
-                  "trying a larger palette size", 16 + i)
+            logging.warning("Imagemagick couldn't generate a palette.")
+            logging.warning("Trying a larger palette size %s", 16 + i)
 
     return [re.search("#.{6}", str(col)).group(0) for col in raw_colors[1:]]
 
diff --git a/pywal/colors.py b/pywal/colors.py
index 5472ef5..c0a0f1f 100644
--- a/pywal/colors.py
+++ b/pywal/colors.py
@@ -1,6 +1,7 @@
 """
 Generate a palette using various backends.
 """
+import logging
 import os
 import random
 import re
@@ -90,17 +91,17 @@ def get(img, light=False, backend="wal", cache_dir=CACHE_DIR):
     if os.path.isfile(cache_file):
         colors = theme.file(cache_file)
         util.Color.alpha_num = colors["alpha"]
-        print("colors: Found cached colorscheme.")
+        logging.info("Found cached colorscheme.")
 
     else:
-        print("wal: Generating a colorscheme...")
+        logging.info("Generating a colorscheme...")
 
         if backend == "random":
             backends = list_backends()
             random.shuffle(backends)
             backend = backends[0]
 
-        print("wal: Using", backend, "backend.")
+        logging.info("Using %s backend.", backend)
 
         # Dynamically import the backend we want to use.
         # This keeps the dependencies "optional".
@@ -113,7 +114,7 @@ def get(img, light=False, backend="wal", cache_dir=CACHE_DIR):
         colors = colors_to_dict(getattr(backend, "get")(img, light), img)
 
         util.save_file_json(colors, cache_file)
-        print("wal: Generation complete.")
+        logging.info("Generation complete.")
 
     return colors
 
diff --git a/pywal/export.py b/pywal/export.py
index 120150d..ed7a846 100644
--- a/pywal/export.py
+++ b/pywal/export.py
@@ -1,6 +1,7 @@
 """
 Export colors in various formats.
 """
+import logging
 import os
 
 from .settings import CACHE_DIR, MODULE_DIR, CONF_DIR
@@ -65,8 +66,8 @@ def every(colors, output_dir=CACHE_DIR):
         if file.name != '.DS_Store':
             template(colors, file.path, join(output_dir, file.name))
 
-    print("export: Exported all files.")
-    print("export: Exported all user files.")
+    logging.info("Exported all files.")
+    logging.info("Exported all user files.")
 
 
 def color(colors, export_type, output_file=None):
@@ -79,6 +80,6 @@ def color(colors, export_type, output_file=None):
 
     if os.path.isfile(template_file):
         template(all_colors, template_file, output_file)
-        print("export: Exported %s." % export_type)
+        logging.info("Exported %s.", export_type)
     else:
-        print("warning: template '%s' doesn't exist." % export_type)
+        logging.warning("Template '%s' doesn't exist.", export_type)
diff --git a/pywal/image.py b/pywal/image.py
index d62cc26..f30a82d 100644
--- a/pywal/image.py
+++ b/pywal/image.py
@@ -1,6 +1,7 @@
 """
 Get the image file.
 """
+import logging
 import os
 import random
 import sys
@@ -24,7 +25,7 @@ def get_random_image(img_dir):
         images.remove(current_wall)
 
     elif not images:
-        print("error: No images found in directory.")
+        logging.error("No images found in directory.")
         sys.exit(1)
 
     random.shuffle(images)
@@ -41,7 +42,7 @@ def get(img, cache_dir=CACHE_DIR):
         wal_img = get_random_image(img)
 
     else:
-        print("error: No valid image file found.")
+        logging.error("No valid image file found.")
         sys.exit(1)
 
     wal_img = os.path.abspath(wal_img)
@@ -49,5 +50,5 @@ def get(img, cache_dir=CACHE_DIR):
     # Cache the image file path.
     util.save_file(wal_img, os.path.join(cache_dir, "wal"))
 
-    print("image: Using image", wal_img)
+    logging.info("Using image %s.", wal_img)
     return wal_img
diff --git a/pywal/reload.py b/pywal/reload.py
index e815d64..7869d0b 100644
--- a/pywal/reload.py
+++ b/pywal/reload.py
@@ -1,6 +1,7 @@
 """
 Reload programs.
 """
+import logging
 import os
 import shutil
 import subprocess
@@ -32,17 +33,17 @@ def oomox(gen_theme):
     """Call oomox to generate a theme."""
     if gen_theme:
         if not shutil.which("oomox-cli"):
-            print("gtk: oomox not found, skipping...")
+            logging.warning("Oomox not found, skipping...")
             return
 
         oomox_file = os.path.join(CACHE_DIR, "colors-oomox")
 
-        print("reload: Waiting for oomox...")
+        logging.info("Waiting for oomox...")
         subprocess.run(["oomox-cli", "-o", "wal", oomox_file],
                        stdout=subprocess.DEVNULL)
 
     else:
-        print("gtk: Use -g to generate an oomox theme.")
+        logging.info("Use -g to generate an oomox theme.")
 
 
 def gtk():
@@ -55,7 +56,7 @@ def gtk():
         util.disown(["python2", gtk_reload])
 
     else:
-        print("warning: GTK2 reload support requires Python 2.")
+        logging.warning("GTK2 reload support requires Python 2.")
 
 
 def i3():
@@ -93,5 +94,5 @@ def env(xrdb_file=None, tty_reload=True):
     i3()
     sway()
     polybar()
-    print("reload: Reloaded environment.")
+    logging.info("Reloaded environment.")
     tty(tty_reload)
diff --git a/pywal/scripts/gtk_reload.py b/pywal/scripts/gtk_reload.py
index ffb267d..e4c2bdf 100644
--- a/pywal/scripts/gtk_reload.py
+++ b/pywal/scripts/gtk_reload.py
@@ -10,7 +10,7 @@ Original source: https://crunchbang.org/forums/viewtopic.php?id=39646
 try:
     import gtk
 except ImportError:
-    print("error: GTK reload requires PyGTK.")
+    print("[ERROR] gtk_reload: GTK reload requires PyGTK.")
     exit(1)
 
 
diff --git a/pywal/sequences.py b/pywal/sequences.py
index 0376342..0a6a99e 100644
--- a/pywal/sequences.py
+++ b/pywal/sequences.py
@@ -2,6 +2,7 @@
 Send sequences to all open terminals.
 """
 import glob
+import logging
 import os
 
 from .settings import CACHE_DIR, OS
@@ -89,4 +90,4 @@ def send(colors, cache_dir=CACHE_DIR, to_send=True):
             util.save_file(sequences, term)
 
     util.save_file(sequences, os.path.join(cache_dir, "sequences"))
-    print("colors: Set terminal colors.")
+    logging.info("Set terminal colors.")
diff --git a/pywal/theme.py b/pywal/theme.py
index 6439d40..96f86b9 100644
--- a/pywal/theme.py
+++ b/pywal/theme.py
@@ -1,6 +1,7 @@
 """
 Theme file handling.
 """
+import logging
 import os
 import random
 import sys
@@ -72,5 +73,5 @@ def file(input_file):
         return parse_theme(theme_file)
 
     else:
-        print("No colorscheme file found, exiting...")
+        logging.error("No colorscheme file found, exiting...")
         sys.exit(1)
diff --git a/pywal/util.py b/pywal/util.py
index 65d4557..0c678c9 100644
--- a/pywal/util.py
+++ b/pywal/util.py
@@ -3,6 +3,7 @@ Misc helper functions.
 """
 import colorsys
 import json
+import logging
 import os
 import subprocess
 
@@ -75,7 +76,7 @@ def save_file(data, export_file):
         with open(export_file, "w") as file:
             file.write(data)
     except PermissionError:
-        print("warning: Couldn't write to %s." % export_file)
+        logging.warning("Couldn't write to %s.", export_file)
 
 
 def save_file_json(data, export_file):
@@ -91,6 +92,17 @@ def create_dir(directory):
     os.makedirs(directory, exist_ok=True)
 
 
+def setup_logging():
+    """Logging config."""
+    logging.basicConfig(format=("[%(levelname)s\033[0m] "
+                                "\033[1;31m%(module)s\033[0m: "
+                                "%(message)s"),
+                        level=logging.INFO)
+    logging.addLevelName(logging.ERROR, '\033[1;31mE')
+    logging.addLevelName(logging.INFO, '\033[1;32mI')
+    logging.addLevelName(logging.WARNING, '\033[1;33mW')
+
+
 def hex_to_rgb(color):
     """Convert a hex color to rgb."""
     return tuple(bytes.fromhex(color.strip("#")))
diff --git a/pywal/wallpaper.py b/pywal/wallpaper.py
index e4ebb59..1dd25f7 100644
--- a/pywal/wallpaper.py
+++ b/pywal/wallpaper.py
@@ -1,5 +1,6 @@
 """Set the wallpaper."""
 import ctypes
+import logging
 import os
 import shutil
 import subprocess
@@ -61,7 +62,7 @@ def set_wm_wallpaper(img):
         util.disown(["display", "-backdrop", "-window", "root", img])
 
     else:
-        print("error: No wallpaper setter found.")
+        logging.error("No wallpaper setter found.")
         return
 
 
@@ -135,7 +136,7 @@ def change(img):
     else:
         set_desktop_wallpaper(desktop, img)
 
-    print("wallpaper: Set the new wallpaper.")
+    logging.info("Set the new wallpaper.")
 
 
 def get(cache_dir=CACHE_DIR):