Merge branch 'apt-pin-type' into 'master'

New type: __apt_pin - manage apt pinning

See merge request ungleich-public/cdist!1005

cdist/conf/type/__apt_pin/man.rst

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+cdist-type__apt_pin(7)
+======================
+
+NAME
+----
+cdist-type__apt_pin - Manage apt pinning rules
+
+
+DESCRIPTION
+-----------
+Adds/removes/edits rules to pin some packages to a specific distribution. Useful if using multiple debian repositories at the same time. (Useful, if one wants to use a few specific packages from backports or perhaps Debain testing... or even sid.)
+
+
+REQUIRED PARAMETERS
+-------------------
+distribution
+   Specifies what distribution the package should be pinned to. Accepts both codenames (buster/bullseye/sid) and suite names (stable/testing/...).
+
+
+OPTIONAL PARAMETERS
+-------------------
+package
+   Package name, glob or regular expression to match (multiple) packages. If not specified `__object_id` is used.
+
+priority
+   The priority value to assign to matching packages. Deafults to 500. (To match the default target distro's priority)
+
+state
+   Will be passed to underlying `__file` type; see there for valid values and defaults.
+
+
+
+BOOLEAN PARAMETERS
+------------------
+None.
+
+
+EXAMPLES
+--------
+
+.. code-block:: sh
+
+   # Add the bullseye repo to buster, but do not install any packages by default,
+   # only if explicitely asked for (-1 means "never" for apt)
+    __apt_pin bullseye-default \
+       --package "*" \
+       --distribution bullseye \
+       --priority -1
+
+    require="__apt_pin/bullseye-default" __apt_source bullseye \
+       --uri http://deb.debian.org/debian/ \
+       --distribution bullseye \
+       --component main
+
+    __apt_pin foo --package "foo foo-*" --distribution bullseye
+
+    __foo # Assuming, this installs the `foo` package internally
+
+    __package foo-plugin-extras # Assuming we also need some extra stuff
+
+
+SEE ALSO
+--------
+:strong:`apt_preferences`\ (5)
+:strong:`cdist-type__apt_source`\ (7)
+:strong:`cdist-type__apt_backports`\ (7)
+:strong:`cdist-type__file`\ (7)
+
+AUTHORS
+-------
+Daniel Fancsali <fancsali@gmail.com>
+
+
+COPYING
+-------
+Copyright \(C) 2021 Daniel Fancsali. 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/__apt_pin/manifest

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+#!/bin/sh -e
+#
+# 2021 Daniel Fancsali (fancsali@gmail.com)
+#
+# 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/>.
+#
+
+
+name="$__object_id"
+
+os=$(cat "$__global/explorer/os")
+state="$(cat "$__object/parameter/state")"
+
+if [ -f "$__object/parameter/package" ]; then
+    package="$(cat "$__object/parameter/package")"
+else
+    package=$name
+fi
+
+distribution="$(cat "$__object/parameter/distribution")"
+priority="$(cat "$__object/parameter/priority")"
+
+
+case "$os" in
+   debian|ubuntu|devuan)
+   ;;
+   *)
+      printf "This type is specific to Debian and it's derivatives" >&2
+      exit 1
+   ;;
+esac
+
+case $distribution in
+    stable|testing|unstable|experimental)
+        pin="release a=$distribution"
+        ;;
+    *)
+        pin="release n=$distribution"
+        ;;
+esac
+
+
+__file "/etc/apt/preferences.d/$name" \
+    --owner root --group root --mode 0644 \
+    --state "$state" \
+    --source - << EOF
+Package: $package
+Pin: $pin
+Pin-Priority: $priority
+EOF

cdist/conf/type/__apt_pin/parameter/default/state

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+present

cdist/conf/type/__apt_pin/parameter/optional

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+state
+package

cdist/conf/type/__apt_pin/parameter/required

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+distribution
+priority