Add support for Nix/NixOS

src/rosdep2/__init__.py

@@ -59,8 +59,9 @@ def create_default_installer_context(verbose=False):
     from .platforms import arch
     from .platforms import cygwin
     from .platforms import debian
-    from .platforms import openembedded
     from .platforms import gentoo
+    from .platforms import nix
+    from .platforms import openembedded
     from .platforms import opensuse
     from .platforms import osx
     from .platforms import pip
@@ -70,7 +71,7 @@ def create_default_installer_context(verbose=False):
     from .platforms import slackware
     from .platforms import source
 
-    platform_mods = [alpine, arch, cygwin, debian, gentoo, openembedded, opensuse, osx, redhat, slackware, freebsd]
+    platform_mods = [alpine, arch, cygwin, debian, gentoo, nix, openembedded, opensuse, osx, redhat, slackware, freebsd]
     installer_mods = [source, pip, gem] + platform_mods
 
     context = InstallerContext()

src/rosdep2/platforms/arch.py

@@ -29,10 +29,11 @@
 
 import subprocess
 
+from rospkg.os_detect import OS_ARCH
+
 from ..installers import PackageManagerInstaller
 from .source import SOURCE_INSTALLER
 
-ARCH_OS_NAME = 'arch'
 PACMAN_INSTALLER = 'pacman'
 
 
@@ -41,9 +42,9 @@ def register_installers(context):
 
 
 def register_platforms(context):
-    context.add_os_installer_key(ARCH_OS_NAME, SOURCE_INSTALLER)
-    context.add_os_installer_key(ARCH_OS_NAME, PACMAN_INSTALLER)
-    context.set_default_os_installer_key(ARCH_OS_NAME, lambda self: PACMAN_INSTALLER)
+    context.add_os_installer_key(OS_ARCH, SOURCE_INSTALLER)
+    context.add_os_installer_key(OS_ARCH, PACMAN_INSTALLER)
+    context.set_default_os_installer_key(OS_ARCH, lambda self: PACMAN_INSTALLER)
 
 
 def pacman_detect_single(p):

src/rosdep2/platforms/nix.py

@@ -0,0 +1,62 @@
+# Copyright (c) 2019, Ben Wolsieffer
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above copyright
+#       notice, this list of conditions and the following disclaimer in the
+#       documentation and/or other materials provided with the distribution.
+#     * Neither the name of the Willow Garage, Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived from
+#       this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+# Author Ben Wolsieffer/[email protected]
+import subprocess
+
+from rospkg.os_detect import OS_NIXOS
+
+from ..installers import PackageManagerInstaller
+
+NIX_INSTALLER = 'nix'
+
+
+def register_installers(context):
+    context.set_installer(NIX_INSTALLER, NixInstaller())
+
+
+def register_platforms(context):
+    context.add_os_installer_key(OS_NIXOS, NIX_INSTALLER)
+    context.set_default_os_installer_key(OS_NIXOS, lambda self: NIX_INSTALLER)
+
+
+def nix_detect(packages):
+    # Say that all packages are installed, because Nix handles installation
+    # automatically
+    return packages
+
+
+class NixInstaller(PackageManagerInstaller):
+
+    def __init__(self):
+        super(NixInstaller, self).__init__(nix_detect)
+
+    def get_install_command(self, resolved, interactive=True, reinstall=False, quiet=False):
+        raise NotImplementedError('Nix does not support installing packages through ROS')
+
+    def get_version_strings(self):
+        return subprocess.check_output(('nix', '--version'))