endlesskey: Import only specified content in collections

The previous behaviour, of importing all content from all channels in
the collections, is preserved by setting include_full_channels to true.

https://phabricator.endlessm.com/T35103

config/defaults.ini

@@ -300,6 +300,11 @@ kolibri_pkgspec = https://github.com/learningequality/kolibri/releases/download/
 # (ex. artist, explorer, spanish etc).
 collections =
 
+# By default, only the content specified in each collection will be included.
+# Set this to true to include all content from all channels in the requested
+# collections.
+include_full_channels = false
+
 [ostree]
 # Repository setup. By default the remote, remote repo and OS name are
 # all named eos.

hooks/image/53-ek-content-preload

@@ -8,28 +8,30 @@ if [[ ! "${EIB_FLATPAK_REMOTE_FLATHUB_APPS}" =~ .*"org.endlessos.Key".* ]]; then
   exit 0
 fi
 
-# Get the list of channels to preload.
+selected_collection_files=()
+
 channels_file="${EIB_TMPDIR}"/ek-channels
 rm -f "${channels_file}"
 touch "${channels_file}"
-collections="${OSTREE_VAR}"/lib/flatpak/app/org.endlessos.Key/current/active/files/share/endless-key/collections/*.json
-for collection in ${collections}; do
+all_collection_files="${OSTREE_VAR}"/lib/flatpak/app/org.endlessos.Key/current/active/files/share/endless-key/collections/*.json
+for collection_file in ${all_collection_files}; do
   # Check if the file basename stripped off of -0001.json is part of the list
   # of collections to be installed.
-  bn=$(basename ${collection})
+  bn=$(basename ${collection_file})
   if [[ "${EIB_ENDLESSKEY_COLLECTIONS}" =~ .*"${bn%-????.json}".* ]] ; then
-    jq -r '.channels[].id' "${collection}" >> "${channels_file}"
+    selected_collection_files+=("${collection_file}")
+    jq -r '.channels[].id' "${collection_file}" >> "${channels_file}"
   fi
 done
 
-channels=$(sort -u "${channels_file}")
-if [ -z "${channels}" ]; then
+all_channels=$(sort -u "${channels_file}")
+if [ -z "${all_channels}" ]; then
   echo "No Kolibri channels to preload"
   exit 0
 fi
 
 # Seed the needed channels on the content server.
-"${EIB_HELPERSDIR}"/seed-kolibri-channels ${channels}
+"${EIB_HELPERSDIR}"/seed-kolibri-channels ${all_channels}
 
 venv_dir="${EIB_TMPDIR}/kolibri-content-venv"
 python3 -m venv ${venv_dir}
@@ -48,14 +50,29 @@ if [ -n "${EIB_KOLIBRI_CENTRAL_CONTENT_BASE_URL}" ]; then
   export KOLIBRI_CENTRAL_CONTENT_BASE_URL
 fi
 
-for channel in $channels; do
+for channel in $all_channels; do
   kolibri manage --skip-update importchannel network "${channel}"
-  EIB_RETRY_ATTEMPTS=2 EIB_RETRY_INTERVAL=30 eib_retry \
-    kolibri manage --skip-update \
-    importcontent --include-unrenderable-content --fail-on-error \
-    network "${channel}"
 done
 
+if [ "${EIB_ENDLESSKEY_INCLUDE_FULL_CHANNELS}" == true ]; then
+  for channel in $all_channels; do
+    EIB_RETRY_ATTEMPTS=2 EIB_RETRY_INTERVAL=30 eib_retry \
+      kolibri manage --skip-update \
+      importcontent --include-unrenderable-content --fail-on-error \
+      network "${channel}"
+  done
+else
+  for collection_file in "${selected_collection_files[@]}"; do
+    collection_channels=$(jq -r '.channels[].id' "${collection_file}")
+    for channel in $collection_channels; do
+      EIB_RETRY_ATTEMPTS=2 EIB_RETRY_INTERVAL=30 eib_retry \
+        kolibri manage --skip-update \
+        importcontent --include-unrenderable-content --fail-on-error \
+        --manifest="${collection_file}" network "${channel}"
+    done
+  done
+fi
+
 # Empty the user database, and ensure that each instance of this image has a
 # unique Facility ID.
 # <https://kolibri.readthedocs.io/en/latest/install/provision.html#prepare-the-kolibri-folder-for-copying>