dynamically generate version from tags

Use setuptools-scm to get a version from the tag
when released instead of looking for the contents
of a file. Generate a version.py file to replace
the static value in __init__.py.

.gitignore

@@ -8,3 +8,4 @@ sacrebleu.egg-info
 *~
 .DS_Store
 .idea/
+sacrebleu/version.py

pyproject.toml

@@ -1,10 +1,10 @@
 [build-system]
-requires = ["setuptools>=64"]
+requires = ["setuptools>=64", "setuptools_scm>=8"]
 build-backend = "setuptools.build_meta"
 
 [project]
 name = "sacrebleu"
-version = "2.4.1"
+dynamic = ["version"]
 authors = [{ name = "Matt Post", email = "post@cs.jhu.edu" }]
 maintainers = [{ name = "Matt Post", email = "post@cs.jhu.edu" }]
 description = "Hassle-free computation of shareable, comparable, and reproducible BLEU, chrF, and TER scores"
@@ -72,3 +72,6 @@ Repository = "https://github.com/mjpost/sacrebleu"
 
 [tool.setuptools.package-data]
 sacrebleu = ["py.typed"]
+
+[tool.setuptools_scm]
+version_file = "sacrebleu/version.py"

sacrebleu/__init__.py

@@ -14,30 +14,53 @@
 # express or implied. See the License for the specific language governing
 # permissions and limitations under the License.
 
-__version__ = '2.4.1'
-__description__ = 'Hassle-free computation of shareable, comparable, and reproducible BLEU, chrF, and TER scores'
+__description__ = "Hassle-free computation of shareable, comparable, and reproducible BLEU, chrF, and TER scores"
 
 
-from .utils import smart_open, SACREBLEU_DIR, download_test_set
-from .utils import get_source_file, get_reference_files
-from .utils import get_available_testsets, get_langpairs_for_testset
-from .metrics.helpers import extract_word_ngrams, extract_char_ngrams
+# Backward compatibility functions for old style API access (<= 1.4.10)
+from .compat import (
+    corpus_bleu,
+    corpus_chrf,
+    corpus_ter,
+    raw_corpus_bleu,
+    sentence_bleu,
+    sentence_chrf,
+    sentence_ter,
+)
 from .dataset import DATASETS
 from .metrics import BLEU, CHRF, TER
-
-# Backward compatibility functions for old style API access (<= 1.4.10)
-from .compat import corpus_bleu, raw_corpus_bleu, sentence_bleu
-from .compat import corpus_chrf, sentence_chrf
-from .compat import corpus_ter, sentence_ter
+from .metrics.helpers import extract_char_ngrams, extract_word_ngrams
+from .utils import (
+    SACREBLEU_DIR,
+    download_test_set,
+    get_available_testsets,
+    get_langpairs_for_testset,
+    get_reference_files,
+    get_source_file,
+    smart_open,
+)
+from .version import __version__
 
 __all__ = [
-    'smart_open', 'SACREBLEU_DIR', 'download_test_set',
-    'get_source_file', 'get_reference_files',
-    'get_available_testsets', 'get_langpairs_for_testset',
-    'extract_word_ngrams', 'extract_char_ngrams',
-    'DATASETS',
-    'BLEU', 'CHRF', 'TER',
-    'corpus_bleu', 'raw_corpus_bleu', 'sentence_bleu',
-    'corpus_chrf', 'sentence_chrf',
-    'corpus_ter', 'sentence_ter'
+    "smart_open",
+    "SACREBLEU_DIR",
+    "download_test_set",
+    "get_source_file",
+    "get_reference_files",
+    "get_available_testsets",
+    "get_langpairs_for_testset",
+    "extract_word_ngrams",
+    "extract_char_ngrams",
+    "DATASETS",
+    "BLEU",
+    "CHRF",
+    "TER",
+    "corpus_bleu",
+    "raw_corpus_bleu",
+    "sentence_bleu",
+    "corpus_chrf",
+    "sentence_chrf",
+    "corpus_ter",
+    "sentence_ter",
+    "__version__",
 ]