[alpine] add support for alpine in __package and __package_apk

cdist/conf/type/__package/manifest

@@ -1,6 +1,7 @@
 #!/bin/sh -e
 #
 # 2011-2013 Steven Armstrong (steven-cdist at armstrong.cc)
+# 2019 Nico Schottelius (nico-cdist at schottelius.org)
 #
 # This file is part of cdist.
 #
@@ -44,6 +45,7 @@ else
          suse) type="zypper" ;;
          openwrt) type="opkg" ;;
          openbsd) type="pkg_openbsd" ;;
+         alpine) type="apk" ;;
          *)
             echo "Don't know how to manage packages on: $os" >&2
             exit 1

cdist/conf/type/__package_apk/explorer/state

@@ -0,0 +1,36 @@
+#!/bin/sh
+#
+# 2019 Nico Schottelius (nico-cdist at schottelius.org)
+#
+# This file is part of cdist.
+#
+# cdist is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# cdist is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with cdist. If not, see <http://www.gnu.org/licenses/>.
+#
+#
+# Retrieve the status of a package - parsed dpkg output
+#
+
+if [ -f "$__object/parameter/name" ]; then
+   name="$(cat "$__object/parameter/name")"
+else
+   name="$__object_id"
+fi
+
+output=
+
+if [ "$(apk list -I "$name")" ]; then
+    echo present
+else
+    echo absent
+fi

cdist/conf/type/__package_apk/gencode-remote

@@ -0,0 +1,49 @@
+#!/bin/sh -e
+#
+# 2019 Nico Schottelius (nico-cdist at schottelius.org)
+#
+# This file is part of cdist.
+#
+# cdist is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# cdist is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with cdist. If not, see <http://www.gnu.org/licenses/>.
+#
+#
+# Manage packages on Debian and co.
+#
+
+if [ -f "$__object/parameter/name" ]; then
+   name="$(cat "$__object/parameter/name")"
+else
+   name="$__object_id"
+fi
+
+state_should="$(cat "$__object/parameter/state")"
+state_is="$(cat "$__object/explorer/state")"
+
+# Nothing to be done
+[ "$state_is" = "$state_should" ] && exit 0
+
+case "$state_should" in
+    present)
+        echo "apk add -q '$name'"
+        echo "installed" >> "$__messages_out"
+    ;;
+    absent)
+        echo "apk del -q '$name'"
+        echo "removed" >> "$__messages_out"
+    ;;
+    *)
+        echo "Unknown state: $state_should" >&2
+        exit 1
+    ;;
+esac

cdist/conf/type/__package_apk/man.rst

@@ -0,0 +1,55 @@
+cdist-type__package_akp(7)
+==========================
+
+NAME
+----
+cdist-type__package_akp - Manage packages with akp
+
+
+DESCRIPTION
+-----------
+apk is usually used on Alpine to manage packages.
+
+
+REQUIRED PARAMETERS
+-------------------
+None
+
+
+OPTIONAL PARAMETERS
+-------------------
+name
+   If supplied, use the name and not the object id as the package name.
+
+state
+    Either "present" or "absent", defaults to "present"
+
+
+EXAMPLES
+--------
+
+.. code-block:: sh
+
+    # Ensure zsh in installed
+    __package_apk zsh --state present
+
+    # Remove package
+    __package_apk apache2 --state absent
+
+
+SEE ALSO
+--------
+:strong:`cdist-type__package`\ (7)
+
+
+AUTHORS
+-------
+Nico Schottelius <nico-cdist--@--schottelius.org>
+
+
+COPYING
+-------
+Copyright \(C) 2019 Nico Schottelius. You can redistribute it
+and/or modify it under the terms of the GNU General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.

cdist/conf/type/__package_apk/parameter/default/state

@@ -0,0 +1 @@
+present

cdist/conf/type/__package_apk/parameter/optional

@@ -0,0 +1,2 @@
+name
+state