Fix error when --max-depth isn't set

Author: thebigmunch

USAGE.md

@@ -90,7 +90,7 @@ Options                | Description
 -q, --quiet            | Don't output status messages<br>With -l,--log will display gmusicapi warnings<br>With -d,--dry-run will display song list
 --delete-on-success    | Delete successfully uploaded local files.
 -R, --no-recursion     | Disable recursion when scanning for local files.<br>This is equivalent to setting --max-depth to 1.
---max-depth DEPTH      | Set maximum depth of recursion when scanning for local files.
+--max-depth DEPTH      | Set maximum depth of recursion when scanning for local files.<br>Default is infinite recursion.
 -e, -exclude           | Exclude file paths matching a Python regex pattern<br>This option can be set multiple times
 -f, --include-filter   | Include Google songs (download) or local songs (upload) by field:pattern filter (e.g. "artist:Muse").*<br>Values can be any valid [Python regex pattern](http://docs.python.org/2/library/re.html)<br>This option can be set multiple times
 -F, --exclude-filter   | Exclude Google songs (download) or local songs (upload) by field:pattern filter (e.g. "artist:Muse").*<br>Values can be any valid [Python regex pattern](http://docs.python.org/2/library/re.html)<br>This option can be set multiple times
@@ -138,7 +138,7 @@ Options                | Description
 -q, --quiet            | Don't output status messages<br>With -l,--log will display gmusicapi warnings<br>With -d,--dry-run will display song list
 --delete-on-success    | Delete successfully uploaded local files.
 -R, --no-recursion     | Disable recursion when scanning for local files.<br>This is equivalent to setting --max-depth to 1.
---max-depth DEPTH      | Set maximum depth of recursion when scanning for local files.
+--max-depth DEPTH      | Set maximum depth of recursion when scanning for local files.<br>Default is infinite recursion.
 -e, -exclude           | Exclude file paths matching a Python regex pattern<br>This option can be set multiple times
 -f, --include-filter   | Include local songs by field:pattern filter (e.g. "artist:Muse").*<br>Values can be any valid [Python regex pattern](http://docs.python.org/2/library/re.html)<br>This option can be set multiple times
 -F, --exclude-filter   | Exclude local songs by field:pattern filter (e.g. "artist:Muse").*<br>Values can be any valid [Python regex pattern](http://docs.python.org/2/library/re.html)<br>This option can be set multiple times

gmusicapi_scripts/gmsync.py

@@ -36,6 +36,7 @@
   -R, --no-recursion                    Disable recursion when scanning for local files.
                                         This is equivalent to setting --max-depth to 1.
   --max-depth DEPTH                     Set maximum depth of recursion when scanning for local files.
+                                        Default is infinite recursion. [Default: 0]
   -e PATTERN, --exclude PATTERN         Exclude file paths matching pattern.
                                         This option can be set multiple times.
   -f FILTER, --include-filter FILTER    Include Google songs (download) or local songs (upload)

gmusicapi_scripts/gmupload.py

@@ -28,6 +28,7 @@
   -R, --no-recursion                    Disable recursion when scanning for local files.
                                         This is equivalent to setting --max-depth to 1.
   --max-depth DEPTH                     Set maximum depth of recursion when scanning for local files.
+                                        Default is infinite recursion. [Default: 0]
   -e PATTERN, --exclude PATTERN         Exclude file paths matching a Python regex pattern.
   -f FILTER, --include-filter FILTER    Include local songs by field:pattern filter (e.g. "artist:Muse").
                                         Songs can match any filter criteria.