__package_pip: add extras explorer

The two new explorers detect all installed extras for this package.

cdist/conf/type/__package_pip/explorer/distinfo-dir

@@ -0,0 +1,45 @@
+#!/bin/sh
+#
+# 2021 Matthias Stecher (matthiasstecher at gmx.de)
+#
+# 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/>.
+#
+
+
+nameparam="$__object/parameter/name"
+if [ -f "$nameparam" ]; then
+    name=$(cat "$nameparam")
+else
+    name="$__object_id"
+fi
+
+pipparam="$__object/parameter/pip"
+if [ -f "$pipparam" ]; then
+    pip=$(cat "$pipparam")
+else
+    pip="$( "$__type_explorer/pip" )"
+fi
+
+
+if command -v "$pip" >/dev/null 2>&1; then
+    # assemble the path where pip stores all pip package info
+    "$pip" show "$name" \
+        | awk -F': ' '
+            $1 == "Name" {name=$2; gsub(/-/,"_",name); next}
+            $1 == "Version" {version=$2; next}
+            $1 == "Location" {location=$2; next}
+            END {if (version != "") printf "%s/%s-%s.dist-info", location, name, version}'
+fi

cdist/conf/type/__package_pip/explorer/extras

@@ -0,0 +1,26 @@
+#!/bin/sh
+#
+# 2021 Matthias Stecher (matthiasstecher at gmx.de)
+#
+# 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/>.
+#
+
+
+distinfo_dir="$("$__type_explorer/distinfo-dir")"
+if [ "$distinfo_dir" ]; then
+    # output all extras that are installed
+    awk -F': ' '$1 == "Provides-Extra"{print $2}' "$distinfo_dir/METADATA"
+fi