Add override for rosdep sources cache path

See #108 and #109 for the corresponding discussion

catkin_lint.pod

@@ -42,6 +42,7 @@ B<catkin_lint> [B<--config> I<FILE>] [B<--quiet> | B<--no-quiet>]
             [B<--pkg> I<PKG>] [B<--skip-pkg> I<PKG>]
             [B<--package-path> I<PATH>] [B<--skip-path> I<MATCH>]
             [B<--rosdistro> I<DISTRO>] [B<--offline>] [B<--no-offline>]
+            [B<--rosdep-cache-path> I<PATH>]
             [B<--resolve-env> | B<--no-resolve-env>]
             [B<--output> I<FORMAT> | B<--text> | B<--explain> | B<--xml> | B<--json>]
             [B<--color> I<MODE>]
@@ -155,6 +156,11 @@ packages which can be found locally through the B<ROS> package search path.
 
 Allow metadata queries to the B<ROS> package index. This is the default.
 
+=item B<--rosdep-cache-path> I<PATH>
+
+Override the default location of the rosdep sources cache. This option has the same
+effect as setting the B<ROSDEP_CACHE_PATH> environment variable.
+
 =item B<--resolve-env>
 
 Resolve environment variables B<$ENV{}> in CMake scripts. By default, B<catkin_lint> will treat
@@ -317,6 +323,11 @@ By default, this value is taken from the B<ROS_DISTRO> environment variable.
 B<catkin_lint> will use this to query the B<ROS> database for packages which are not
 locally installed.
 
+=item B<rosdep_cache_path> = I<PATH>
+
+Override the default location of the rosdep sources cache. This option has the same
+effect as setting the B<ROSDEP_CACHE_PATH> environment variable.
+
 =item B<severity_level> = B<0> E<verbar> B<1> E<verbar> B<2>
 
 Choose the severity level for diagnostic output. Level 0 displays errors only,

gh-pages/docs/usage.md

@@ -13,6 +13,7 @@ of a script.
             \[**--pkg** _PKG_\] \[**--skip-pkg** _PKG_\]
             \[**--package-path** _PATH_\] \[**--skip-path** _MATCH_\]
             \[**--rosdistro** _DISTRO_\] \[**--offline**\] \[**--no-offline**\]
+            \[**--rosdep-cache-path** _PATH_\]
             \[**--resolve-env** | **--no-resolve-env**\]
             \[**--output** _FORMAT_ | **--text** | **--explain** | **--xml** | **--json**\]
             \[**--color** _MODE_\]
@@ -104,6 +105,11 @@ of a script.
 
     Allow metadata queries to the **ROS** package index. This is the default.
 
+- **--rosdep-cache-path** _PATH_
+
+    Override the default location of the rosdep sources cache. This option has the same
+    effect as setting the **ROSDEP_CACHE_PATH** environment variable.
+
 - **--resolve-env**
 
     Resolve environment variables **$ENV{}** in CMake scripts. By default, **catkin\_lint** will treat
@@ -236,6 +242,11 @@ The main section is called `[catkin_lint]` and will take the following
     **catkin\_lint** will use this to query the **ROS** database for packages which are not
     locally installed.
 
+- **rosdep\_cache\_path** = _PATH_
+
+    Override the default location of the rosdep sources cache. This option has the same
+    effect as setting the **ROSDEP_CACHE_PATH** environment variable.
+
 - **severity\_level** = **0** | **1** | **2**
 
     Choose the [severity level](index.md#diagnostic-levels) for diagnostic output.

src/catkin_lint/main.py

@@ -78,6 +78,7 @@ def prepare_arguments(parser):
     parser.add_argument("--skip-path", metavar="PATH", action="append", default=[], help="skip testing any package in a path that contains PATH (can be used multiple times)")
     parser.add_argument("--package-path", metavar="PATH", help="additional package path (separate multiple locations with '%s') [*]" % os.pathsep)
     parser.add_argument("--rosdistro", metavar="DISTRO", help="override ROS distribution (default: ROS_DISTRO environment variable) [*]")
+    parser.add_argument("--rosdep-cache-path", metavar="PATH", help="override rosdep sources cache location [*]")
     m = parser.add_mutually_exclusive_group()
     m.add_argument("--resolve-env", action="store_true", default=None, help="resolve $ENV{} references from environment variables [*]")
     m.add_argument("--no-resolve-env", action="store_false", help="override resolve_env=yes option from configuration file")
@@ -166,6 +167,8 @@ def run_linter(args):
     config["catkin_lint"] = {}
     if args.rosdistro:
         config["catkin_lint"]["rosdistro"] = args.rosdistro
+    if args.rosdep_cache_path:
+        config["catkin_lint"]["rosdep_cache_path"] = args.rosdep_cache_path
     if args.package_path:
         config["catkin_lint"]["package_path"] = args.package_path
     if args.color:
@@ -212,6 +215,8 @@ def run_linter(args):
     pkgs_to_check = []
     if "rosdistro" in config["catkin_lint"]:
         os.environ["ROS_DISTRO"] = config["catkin_lint"]["rosdistro"]
+    if "rosdep_cache_path" in config["catkin_lint"]:
+        os.environ["ROSDEP_CACHE_PATH"] = config["catkin_lint"]["rosdep_cache_path"]
     quiet = config["catkin_lint"].getboolean("quiet", False)
     env = CatkinEnvironment(
         os_env=os.environ if config["catkin_lint"].getboolean("resolve_env", False) else None,

src/catkin_lint/ros.py

@@ -59,7 +59,7 @@ def get_rosdep(quiet):
     from rosdep2.rospkg_loader import DEFAULT_VIEW_KEY
     from rosdep2.sources_list import SourcesListLoader
     dummy = DummyRospkg()
-    sources_loader = SourcesListLoader.create_default()
+    sources_loader = SourcesListLoader.create_default(sources_cache_dir=os.environ.get("ROSDEP_CACHE_PATH", None))
     lookup = RosdepLookup.create_from_rospkg(rospack=dummy, rosstack=dummy, sources_loader=sources_loader)
     return Rosdep(view=lookup.get_rosdep_view(DEFAULT_VIEW_KEY), quiet=quiet)