🎨 Nudge build+download towards the standard qurator_data_lib.sh

qurator_data_lib.sh

@@ -0,0 +1,71 @@
+check_data_subdir() {
+  result=0
+
+  if git submodule status $DATA_SUBDIR | grep -q '^-'; then
+    echo "$DATA_SUBDIR/ is not an initialized submodule"; result=1
+  fi
+  if ! [ -e $DATA_SUBDIR/.git/annex ]; then
+    echo "$DATA_SUBDIR/ is not a git annex repository"; result=1
+  fi
+  if ! (cd $DATA_SUBDIR && git annex version | grep -q 'local repository version: 7'); then
+    echo "$DATA_SUBDIR/ is not a git annex repository version 7"; result=1
+  fi
+  if ! (cd $DATA_SUBDIR && git remote | grep -q '^nfs$'); then
+    echo "$DATA_SUBDIR/ has no git remote 'nfs'"; result=1
+  fi
+
+  return $result
+}
+
+annex_get() {
+  file_pattern="$1"
+
+  (
+    cd data
+    git annex get $file_pattern
+
+    # fsck seems to be necessary to fix the files if we're in a submodule
+    git annex fsck $file_pattern
+  )
+}
+
+download_to() {
+  download_source="$1"
+  unpack_to="$2"
+
+  (
+    cd data
+    tmpf=`mktemp 'tmp.XXXXX'`
+    wget -O $tmpf "$download_source"
+    mkdir -p "$unpack_to"
+    # Unpacking relies on tar -a unpacking any tar compression
+    tar -C "$unpack_to" -af $tmpf -xv
+    rm -f $tmpf
+  )
+}
+
+suggest_commands() {
+  echo "Suggested commands:"
+  echo
+  echo "git submodule update --init"
+  echo "(cd $DATA_SUBDIR && git annex init --version=7)"
+  echo "(cd $DATA_SUBDIR && git remote add nfs /<... path to ...>/GitNX-Repository/qurator/qurator-data)"
+}
+
+handle_data() {
+  if [ -n "$FORCE_DOWNLOAD" ]; then
+    get_from_web
+  elif ! check_data_subdir; then
+    select choice in "Abort to manually fix $DATA_SUBDIR submodule" "Download data files from the web"; do
+      if [ $REPLY = 1 ]; then
+        suggest_commands
+        exit
+      else
+        get_from_web
+        break
+      fi
+    done
+  else
+    get_from_annex
+  fi
+}