Initial commit: snap using zen-bin

snap/hooks/disconnect-plug-host-hunspell

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+#!/bin/sh
+
+# Clean up old Firefox snap mount for host hunspell; we now use
+# the system-files interface for host hunspell dictionaries.
+
+# TODO: Drop this (along with the host-hunspell mount-control
+# declaration in snapcraft.yaml) later in the future once a
+# reasonable amount of time has passed and nearly all users
+# have an updated version and were migrated to use system-files,
+# and just about no new Ubuntu installations start with a
+# Firefox snap that has the older mount-control interface.
+snapctl umount $SNAP_COMMON/host-hunspell || true
+rm -r $SNAP_COMMON/host-hunspell || true

snap/hooks/install

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+post-refresh

snap/hooks/post-refresh

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+#!/bin/sh
+
+# Copyright (C) 2022 Canonical Ltd.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 3, as
+# published by the Free Software Foundation.
+#
+# This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+
+host_hunspell=/var/lib/snapd/hostfs/usr/share/hunspell
+
+if [ ! -d  $host_hunspell ]; then
+    echo "No host hunspell, skipping"
+    exit 0
+fi
+
+DICPATH=$SNAP_COMMON/snap-hunspell
+
+if [ -d $DICPATH ]; then
+    # Clean up on each refresh to ensure we have an up-to-date list
+    # of host dictionaries.
+    find $DICPATH -type l -name "*.dic" -or -name "*.aff" | xargs rm
+else
+    mkdir -p $DICPATH
+fi
+
+# We deliberately don't directly use the host dictionary files.
+# Instead, we use their names to know which ones the user has
+# installed on their system, and we use the corresponding ones
+# we primed in '$SNAP/usr/share/hunspell' in our 'hunspell' part.
+#
+# - We don't set DICPATH=/var/lib/snapd/hostfs/usr/share/hunspell
+#   to avoid potential incompatibility due to different hunspell
+#   versions inside the snap and outside on the host.  See:
+#   https://github.com/snapcore/snapd/pull/11025
+#
+# - We don't set DICPATH="$SNAP/usr/share/hunspell" because that
+#   would result in all available dictionaries we primed in our
+#   'hunspell' part being displayed in Firefox's interface,
+#   presenting an overwhelming number of options to the user.
+#   So instead we only use those that were installed on the host.
+#   This way, the user could affect the dictionaries available to
+#   Firefox snap similarly to how they could for non-snap Firefox.
+for dic in $(find $host_hunspell/ -name "*.dic"); do
+    dic_file=$(basename $dic)
+    aff_file="${dic_file%%.dic}.aff"
+    # Some dic,aff files in hunspell are themselves symlinks to other files,
+    # e.g. /usr/share/hunspell/fr_CH.dic -> fr.dic.
+    # That extra level of indirection somehow breaks spell checking.
+    # We therefore use readlink to link to the "real" file, not to a symlink.
+    if [ -e "$SNAP/usr/share/hunspell/${dic_file}" ]; then
+        ln -s "$(readlink -e $SNAP/usr/share/hunspell/${dic_file})" $DICPATH/${dic_file}
+    fi
+    if [ -e "$SNAP/usr/share/hunspell/${aff_file}" ]; then
+        ln -s "$(readlink -e $SNAP/usr/share/hunspell/${aff_file})" $DICPATH/${aff_file}
+    fi
+done