Unify release-handle mapping and harden tools pipeline

- add shared tools/etc/ud_release_handles.tsv for UD version->CLARIN handle mapping

- make metadata and snapshot fetch scripts read from the shared mapping

- add snapshot cleanup controls (--keep-archive, --keep-backup)

- fix metadata generation output guard for first-run/nonexistent output files

ADDING_NEW_UD_VERSION.md

@@ -83,11 +83,10 @@ cat .env
 
 **Before running**, update the script to add the new version's handle ID:
 
-1. Open `00_fetch_ud_clarin-dspace_metadata.py`
-2. Find the `url_postfixes` dictionary
-3. Add entry for new version:
-   ```python
-   "2.18": "11234/1-XXXX",  # Check UD website for correct handle
+1. Open `tools/etc/ud_release_handles.tsv`
+2. Add entry for new version:
+   ```text
+   2.18 11234/1-XXXX
    ```
 
 **Where to find handle?** Visit the [UD release page](https://universaldependencies.org/) and check the LINDAT citation link.
@@ -127,6 +126,11 @@ cat .env
 
 **What does this do?** Downloads the official release archive from LINDAT/CLARIN (`https://hdl.handle.net/<handle>/allzip`), extracts it, and points `UD_repos` to the extracted snapshot.
 
+**Useful options:**
+- `--online`: Force re-download and re-extraction
+- `--keep-archive`: Keep the downloaded zip after extraction
+- `--keep-backup`: Keep previous snapshot as `ud-treebanks-v{VER}.bak.<timestamp>`
+
 ### 7. Verify Snapshot Layout
 
 ```bash
@@ -405,6 +409,11 @@ cd tools
 ls -ld UD_repos ud-treebanks-v2.18
 ```
 
+If you need to preserve artifacts for debugging:
+```bash
+./01_fetch_ud_snapshot.sh --online --rev 2.18 --keep-archive --keep-backup
+```
+
 ### Issue: Metadata extraction fails for a treebank
 
 **Problem:** A treebank is malformed or missing expected files.

tools/00_fetch_ud_clarin-dspace_metadata.py

@@ -32,23 +32,24 @@ handle_redirect_url_prefix = "https://lindat.mff.cuni.cz/repository/items/"
 outfile_pathprefix = "./etc/"
 citation_outfile_name = "citation-{rev}"
 description_outfile_name = "description-{rev}"
-
-# List of URL postfixes
-url_postfixes = {
-    # https://github.com/UniversalDependencies/docs/blob/pages-source/download.md
-    # "2.18": "", 
-    "2.17": "11234/1-6036",  # 339 treebanks, 186 languages, released November 15, 2025.
-    "2.16": "11234/1-5901",  # 319 treebanks, 179 languages, released May 15, 2025.
-    "2.15": "11234/1-5787",  # 296 treebanks, 168 languages, released November 15, 2024.
-    "2.14": "11234/1-5502",  # 283 treebanks, 161 languages, released May 15, 2024.
-    "2.13": "11234/1-5287",  # 259 treebanks, 148 languages, released November 15, 2023.
-    "2.12": "11234/1-5150",  # 245 treebanks, 141 languages, released May 15, 2023.
-    "2.11": "11234/1-4923",  # 243 treebanks, 138 languages, released November 15, 2022.
-    "2.10": "11234/1-4758",  # 228 treebanks, 130 languages, released May 15, 2022.
-    "2.9":  "11234/1-4611",  # 217 treebanks, 122 languages, released November 15, 2021.
-    "2.8":  "11234/1-3687",  # 202 treebanks, 114 languages, released May 15, 2021.
-    "2.7":  "11234/1-3424",  # 183 treebanks, 104 languages, released November 15, 2020.
-}
+release_handle_map_file = Path(__file__).parent / "etc" / "ud_release_handles.tsv"
+
+def load_release_handles(path: Path) -> dict[str, str]:
+    """
+    Load the UD-version -> LINDAT handle mapping from a TSV file.
+    """
+    mapping: dict[str, str] = {}
+    with path.open("r", encoding="utf-8") as fh:
+        for lineno, raw_line in enumerate(fh, start=1):
+            line = raw_line.strip()
+            if not line or line.startswith("#"):
+                continue
+            fields = line.split()
+            if len(fields) != 2:
+                raise ValueError(f"Invalid mapping format at {path}:{lineno}: {raw_line.rstrip()}")
+            rev, handle = fields
+            mapping[rev] = handle
+    return mapping
 
 # Parse command line arguments
 parser = argparse.ArgumentParser(description=__doc__,
@@ -66,6 +67,12 @@ logging.basicConfig(
     datefmt='%Y-%m-%d %H:%M:%S'
 )
 
+# Load version -> handle mapping
+try:
+    url_postfixes = load_release_handles(release_handle_map_file)
+except (OSError, ValueError) as e:
+    raise SystemExit(f"Failed to load release-handle mapping from {release_handle_map_file}: {e}")
+
 # Iterate over the URL postfixes
 for rev,handle in url_postfixes.items():
 

tools/01_fetch_ud_snapshot.sh

@@ -12,23 +12,12 @@ set -euo pipefail
 [ -e .env ] && . .env
 
 ONLINE_MODE=false
+KEEP_ARCHIVE=false
+KEEP_BACKUP=false
 UD_VER=${UD_VER:-"2.17"}
 UDS_SUBDIR="UD_repos"
-
-# Mapping UD version -> LINDAT handle.
-# Keep this in sync with tools/00_fetch_ud_clarin-dspace_metadata.py.
-declare -A HANDLE_MAPPING
-HANDLE_MAPPING["2.7"]="11234/1-3424"
-HANDLE_MAPPING["2.8"]="11234/1-3687"
-HANDLE_MAPPING["2.9"]="11234/1-4611"
-HANDLE_MAPPING["2.10"]="11234/1-4758"
-HANDLE_MAPPING["2.11"]="11234/1-4923"
-HANDLE_MAPPING["2.12"]="11234/1-5150"
-HANDLE_MAPPING["2.13"]="11234/1-5287"
-HANDLE_MAPPING["2.14"]="11234/1-5502"
-HANDLE_MAPPING["2.15"]="11234/1-5787"
-HANDLE_MAPPING["2.16"]="11234/1-5901"
-HANDLE_MAPPING["2.17"]="11234/1-6036"
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+HANDLE_MAP_FILE="${SCRIPT_DIR}/etc/ud_release_handles.tsv"
 
 ###################
 #############
@@ -36,7 +25,7 @@ HANDLE_MAPPING["2.17"]="11234/1-6036"
 # USAGE
 #
 usage() { OUTPUT=${1:-"verbose"}
-echo "Usage: $0 [-o] [-r VER]" >&2
+echo "Usage: $0 [-o] [-r VER] [--keep-archive] [--keep-backup]" >&2
 [ "$OUTPUT" = "short" ] && exit 0
 >&2 cat << EOF
 
@@ -56,6 +45,8 @@ Options:
     -h              Print this help message
     -o|--online     Force re-download and re-extract
     -r|--rev VER    UD version to fetch (default: \${UD_VER} from .env)
+    --keep-archive  Keep downloaded zip archive after extraction
+    --keep-backup   Keep existing snapshot directory as timestamped backup
 EOF
 }
 #
@@ -63,7 +54,7 @@ EOF
 ############
 ##################
 
-VALID_ARGS=$(getopt -o hor: --long help,online,rev: -- "$@")
+VALID_ARGS=$(getopt -o hor: --long help,online,rev:,keep-archive,keep-backup -- "$@")
 if [[ $? -ne 0 ]]; then
   usage "short"
   exit 1
@@ -75,16 +66,31 @@ do
   case "$1" in
     -o | --online) ONLINE_MODE=true; shift   ;;
     -r | --rev)    UD_VER="$2";      shift 2 ;;
+    --keep-archive) KEEP_ARCHIVE=true; shift ;;
+    --keep-backup)  KEEP_BACKUP=true;  shift ;;
     -h | --help)   usage;            shift   ; exit 0 ;;
     --)                              shift   ; break ;;
     *) >&2 echo "Unsupported option: $1"; usage; exit 1 ;;
   esac
 done
 
-HANDLE="${HANDLE_MAPPING[${UD_VER}]:-}"
+if [[ ! -r "${HANDLE_MAP_FILE}" ]]; then
+    >&2 echo "Missing handle mapping file: ${HANDLE_MAP_FILE}"
+    exit 1
+fi
+
+HANDLE="$(
+    awk -v ver="${UD_VER}" '
+        BEGIN { FS="[[:space:]]+" }
+        /^[[:space:]]*#/ { next }
+        NF < 2 { next }
+        $1 == ver { print $2; exit }
+    ' "${HANDLE_MAP_FILE}"
+)"
+
 if [[ -z "${HANDLE}" ]]; then
     >&2 echo "Unsupported UD version: ${UD_VER}"
-    >&2 echo "Update HANDLE_MAPPING in $(basename "$0") first."
+    >&2 echo "Update ${HANDLE_MAP_FILE} first."
     exit 1
 fi
 
@@ -133,9 +139,14 @@ PY
     fi
 
     if [[ -d "${SNAPSHOT_DIR}" ]]; then
-        backup_dir="${SNAPSHOT_DIR}.bak.$(date +%s)"
-        echo "Existing ${SNAPSHOT_DIR} found; moving it to ${backup_dir}"
-        mv "${SNAPSHOT_DIR}" "${backup_dir}"
+        if [[ "${KEEP_BACKUP}" == true ]]; then
+            backup_dir="${SNAPSHOT_DIR}.bak.$(date +%s)"
+            echo "Existing ${SNAPSHOT_DIR} found; moving it to ${backup_dir}"
+            mv "${SNAPSHOT_DIR}" "${backup_dir}"
+        else
+            echo "Existing ${SNAPSHOT_DIR} found; removing it"
+            rm -rf "${SNAPSHOT_DIR}"
+        fi
     fi
 
     mv "${snapshot_candidates[0]}" "${SNAPSHOT_DIR}"
@@ -153,6 +164,11 @@ else
     echo "Snapshot directory already exists: ${SNAPSHOT_DIR}"
 fi
 
+if [[ "${KEEP_ARCHIVE}" != true ]] && [[ -f "${SNAPSHOT_ARCHIVE}" ]]; then
+    echo "Removing archive ${SNAPSHOT_ARCHIVE}"
+    rm -f "${SNAPSHOT_ARCHIVE}"
+fi
+
 if [[ -L "${UDS_SUBDIR}" ]]; then
     ln -sfn "${SNAPSHOT_DIR}" "${UDS_SUBDIR}"
 elif [[ ! -e "${UDS_SUBDIR}" ]]; then

tools/02_generate_metadata.py

@@ -282,7 +282,9 @@ if __name__ == '__main__':
 
     # Write the metadata to json
     output_fn = f"metadata-{UD_VER}.json"
-    if args.override or not open(output_fn, 'r').read():
+    output_path = Path(output_fn)
+    should_write = args.override or (not output_path.exists()) or output_path.stat().st_size == 0
+    if should_write:
         with open(output_fn, 'w') as fh:
             json.dump(results, fh, ensure_ascii=False, sort_keys=True,
                       indent=4, separators=(',', ': '))

tools/README.md

@@ -36,7 +36,7 @@ git add ../parquet ../README.md ../metadata.json
 **00_fetch_ud_clarin-dspace_metadata.py**
 - Downloads citation and description from LINDAT/CLARIN repository
 - Creates: `etc/citation-{VER}`, `etc/description-{VER}`
-- Update `url_postfixes` dict for new versions
+- Uses: `etc/ud_release_handles.tsv` for version -> handle mapping
 
 **00_fetch_ud_codes_and_flags.sh**
 - Downloads language codes and flags from UD docs-automation
@@ -49,6 +49,7 @@ git add ../parquet ../README.md ../metadata.json
 - Downloads official UD release snapshot from LINDAT/CLARIN (`allzip`)
 - Creates: `ud-treebanks-v{VER}/`
 - Creates/updates symlink: `UD_repos -> ud-treebanks-v{VER}`
+- Options: `--online`, `--keep-archive`, `--keep-backup`
 
 ### 02 - Generate Metadata
 
@@ -95,7 +96,8 @@ tools/
 ├── etc/
 │   ├── citation-{VER}                      # Generated citations
 │   ├── description-{VER}                   # Generated descriptions
-│   └── codes_and_flags-{VER}.yaml          # Language metadata
+│   ├── codes_and_flags-{VER}.yaml          # Language metadata
+│   └── ud_release_handles.tsv              # UD version -> CLARIN handle mapping
 ├── templates/
 │   └── README.tmpl                         # Jinja2 template for dataset card
 ├── metadata-{VER}.json                     # Generated metadata (output)
@@ -167,6 +169,15 @@ pip install ud-hf-parquet-tools
 ./01_fetch_ud_snapshot.sh --online --rev 2.17
 ```
 
+**Disk usage after repeated snapshot refreshes:**
+```bash
+# Default behavior deletes archive and replaces old snapshot directory
+./01_fetch_ud_snapshot.sh --online --rev 2.17
+
+# Keep archive and timestamped backup only when needed
+./01_fetch_ud_snapshot.sh --online --rev 2.17 --keep-archive --keep-backup
+```
+
 ## Documentation
 
 - **Comprehensive guide:** [ADDING_NEW_UD_VERSION.md](../ADDING_NEW_UD_VERSION.md)

tools/etc/ud_release_handles.tsv

@@ -0,0 +1,13 @@
+# UD version to LINDAT/CLARIN handle mapping
+# Format: <ud_version><whitespace><handle>
+2.7	11234/1-3424
+2.8	11234/1-3687
+2.9	11234/1-4611
+2.10	11234/1-4758
+2.11	11234/1-4923
+2.12	11234/1-5150
+2.13	11234/1-5287
+2.14	11234/1-5502
+2.15	11234/1-5787
+2.16	11234/1-5901
+2.17	11234/1-6036