From 1d7217f5ca965a0b7ebab4505d269956f8c013f3 Mon Sep 17 00:00:00 2001
From: Mark Cornick <mcornick@mcornick.com>
Date: Wed, 17 Aug 2022 12:53:06 -0400
Subject: [PATCH] Handle common exceptions

---
 cue_to_meta.py | 61 ++++++++++++++++++++++++++++++++++----------------
 1 file changed, 42 insertions(+), 19 deletions(-)

diff --git a/cue_to_meta.py b/cue_to_meta.py
index 835c7f0..f108dec 100755
--- a/cue_to_meta.py
+++ b/cue_to_meta.py
@@ -29,27 +29,50 @@ import sys
 cue_file = sys.argv[1]
 meta_file = re.sub(r"cue$", "meta", cue_file)
 
-with open(cue_file) as f:
-    cue = f.readlines()
+try:
+    with open(cue_file) as f:
+        cue = f.readlines()
+except FileNotFoundError:
+    sys.stderr.write("{} not found\n".format(cue_file))
+    sys.exit(1)
+except IsADirectoryError:
+    sys.stderr.write("{} is a directory\n".format(cue_file))
+    sys.exit(1)
+except PermissionError:
+    sys.stderr.write("No permission to read {}\n".format(cue_file))
+    sys.exit(1)
+except OSError:
+    sys.stderr.write("OS error trying to read {}\n".format(cue_file))
+    sys.exit(1)
 
 title = None
 performer = None
 timestamp = None
 
-with open(meta_file, "w") as f:
-    for line in cue:
-        title_re = re.search(r'^    TITLE "(.*)"$', line)
-        performer_re = re.search(r'^    PERFORMER "(.*)"$', line)
-        index_re = re.search(r"^    INDEX 01 (.*)$", line)
-        if title_re:
-            title = title_re[1]
-        if performer_re:
-            performer = performer_re[1]
-        if index_re:
-            time_re = re.search(r"^(..):(..):..$", index_re[1])
-            timestamp = "00{}{}".format(time_re[1], time_re[2])
-        if title and performer and timestamp:
-            f.write("{}:{} - {}\n".format(timestamp, performer, title))
-            title = None
-            performer = None
-            timestamp = None
+try:
+    with open(meta_file, "w") as f:
+        for line in cue:
+            title_re = re.search(r'^    TITLE "(.*)"$', line)
+            performer_re = re.search(r'^    PERFORMER "(.*)"$', line)
+            index_re = re.search(r"^    INDEX 01 (.*)$", line)
+            if title_re:
+                title = title_re[1]
+            if performer_re:
+                performer = performer_re[1]
+            if index_re:
+                time_re = re.search(r"^(..):(..):..$", index_re[1])
+                timestamp = "00{}{}".format(time_re[1], time_re[2])
+            if title and performer and timestamp:
+                f.write("{}:{} - {}\n".format(timestamp, performer, title))
+                title = None
+                performer = None
+                timestamp = None
+except IsADirectoryError:
+    sys.stderr.write("{} is a directory\n".format(meta_file))
+    sys.exit(1)
+except PermissionError:
+    sys.stderr.write("No permission to write {}\n".format(meta_file))
+    sys.exit(1)
+except OSError:
+    sys.stderr.write("OS error trying to write {}\n".format(meta_file))
+    sys.exit(1)