Issue318 handle missing or invalid path input for commands

annif/backend/fasttext.py

@@ -4,7 +4,7 @@
 import os.path
 import annif.util
 from annif.suggestion import SubjectSuggestion, ListSuggestionResult
-from annif.exception import NotInitializedException
+from annif.exception import NotInitializedException, NotSupportedException
 import fastText
 from . import backend
 from . import mixins
@@ -104,6 +104,9 @@ def _create_model(self):
         self._model.save_model(modelpath)
 
     def train(self, corpus, project):
+        if corpus.is_empty():
+            raise NotSupportedException('training backend {} with no documents'
+                                        .format(self.backend_id))
         self._create_train_file(corpus, project)
         self._create_model()
 

annif/backend/pav.py

@@ -11,7 +11,7 @@
 import annif.suggestion
 import annif.project
 import annif.util
-from annif.exception import NotInitializedException
+from annif.exception import NotInitializedException, NotSupportedException
 from . import ensemble
 
 
@@ -96,6 +96,9 @@ def _create_pav_model(self, source_project_id, min_docs, corpus):
             method=joblib.dump)
 
     def train(self, corpus, project):
+        if corpus.is_empty():
+            raise NotSupportedException('training backend {} with no documents'
+                                        .format(self.backend_id))
         self.info("creating PAV models")
         sources = annif.util.parse_sources(self.params['sources'])
         min_docs = int(self.params['min-docs'])

annif/cli.py

@@ -46,11 +46,14 @@ def open_doc_path(path):
             return annif.corpus.DocumentDirectory(path, require_subjects=True)
         return annif.corpus.DocumentFile(path)
 
-    if len(paths) > 1:
+    if len(paths) == 0:
+        logger.warning('Reading empty file')
+        docs = open_doc_path(os.path.devnull)
+    elif len(paths) == 1:
+        docs = open_doc_path(paths[0])
+    else:
         corpora = [open_doc_path(path) for path in paths]
         docs = annif.corpus.CombinedCorpus(corpora)
-    else:
-        docs = open_doc_path(paths[0])
     return docs
 
 
@@ -86,6 +89,7 @@ def common_options(f):
     """Decorator to add common options for all CLI commands"""
     f = click.option(
         '-p', '--projects', help='Set path to projects.cfg',
+        type=click.Path(dir_okay=False, exists=True),
         callback=set_project_config_file_path, expose_value=False,
         is_eager=True)(f)
     f = click_log.simple_verbosity_option(logger)(f)
@@ -136,7 +140,7 @@ def run_clear_project(project_id):
 
 @cli.command('loadvoc')
 @click.argument('project_id')
-@click.argument('subjectfile', type=click.Path(dir_okay=False))
+@click.argument('subjectfile', type=click.Path(exists=True, dir_okay=False))
 @common_options
 def run_loadvoc(project_id, subjectfile):
     """
@@ -154,7 +158,7 @@ def run_loadvoc(project_id, subjectfile):
 
 @cli.command('train')
 @click.argument('project_id')
-@click.argument('paths', type=click.Path(), nargs=-1)
+@click.argument('paths', type=click.Path(exists=True), nargs=-1)
 @common_options
 def run_train(project_id, paths):
     """
@@ -167,7 +171,7 @@ def run_train(project_id, paths):
 
 @cli.command('learn')
 @click.argument('project_id')
-@click.argument('paths', type=click.Path(), nargs=-1)
+@click.argument('paths', type=click.Path(exists=True), nargs=-1)
 @common_options
 def run_learn(project_id, paths):
     """
@@ -200,7 +204,7 @@ def run_suggest(project_id, limit, threshold, backend_param):
 
 @cli.command('index')
 @click.argument('project_id')
-@click.argument('directory', type=click.Path(file_okay=False))
+@click.argument('directory', type=click.Path(exists=True, file_okay=False))
 @click.option(
     '--suffix',
     default='.annif',
@@ -241,7 +245,7 @@ def run_index(project_id, directory, suffix, force,
 
 @cli.command('eval')
 @click.argument('project_id')
-@click.argument('paths', type=click.Path(), nargs=-1)
+@click.argument('paths', type=click.Path(exists=True), nargs=-1)
 @click.option('--limit', default=10, help='Maximum number of subjects')
 @click.option('--threshold', default=0.0, help='Minimum score threshold')
 @click.option('--backend-param', '-b', multiple=True,
@@ -275,7 +279,7 @@ def run_eval(project_id, paths, limit, threshold, backend_param):
 
 @cli.command('optimize')
 @click.argument('project_id')
-@click.argument('paths', type=click.Path(), nargs=-1)
+@click.argument('paths', type=click.Path(exists=True), nargs=-1)
 @click.option('--backend-param', '-b', multiple=True,
               help='Backend parameters to override')
 @common_options

annif/corpus/types.py

@@ -37,6 +37,14 @@ def _create_document(self, text, uris, labels):
 
         return Document(text=text, uris=uris, labels=labels)
 
+    def is_empty(self):
+        """Check if there are no documents to iterate."""
+        try:
+            next(self.documents)
+            return False
+        except StopIteration:
+            return True
+
 
 Subject = collections.namedtuple('Subject', 'uri label text')
 

annif/project.py

@@ -193,6 +193,9 @@ def _create_vectorizer(self, subjectcorpus):
         if not self.backend.needs_subject_vectorizer:
             logger.debug('not creating vectorizer: not needed by backend')
             return
+        if subjectcorpus.is_empty():
+            raise NotSupportedException(
+                'using TfidfVectorizer with no documents')
         logger.info('creating vectorizer')
         self._vectorizer = TfidfVectorizer(
             tokenizer=self.analyzer.tokenize_words)

tests/test_backend_fasttext.py

@@ -3,6 +3,7 @@
 import pytest
 import annif.backend
 import annif.corpus
+from annif.exception import NotSupportedException
 
 fasttext = pytest.importorskip("annif.backend.fasttext")
 
@@ -48,6 +49,26 @@ def test_fasttext_train_unknown_subject(tmpdir, datadir, project):
     assert datadir.join('fasttext-model').size() > 0
 
 
+def test_fasttext_train_nodocuments(tmpdir, datadir, project):
+    fasttext_type = annif.backend.get_backend("fasttext")
+    fasttext = fasttext_type(
+        backend_id='fasttext',
+        params={
+            'limit': 50,
+            'dim': 100,
+            'lr': 0.25,
+            'epoch': 20,
+            'loss': 'hs'},
+        datadir=str(datadir))
+
+    empty_file = tmpdir.ensure('empty.tsv')
+    empty_document_corpus = annif.corpus.DocumentFile(str(empty_file))
+
+    with pytest.raises(NotSupportedException) as excinfo:
+        fasttext.train(empty_document_corpus, project)
+    assert 'training backend fasttext with no documents' in str(excinfo.value)
+
+
 def test_fasttext_suggest(datadir, project):
     fasttext_type = annif.backend.get_backend("fasttext")
     fasttext = fasttext_type(

tests/test_backend_pav.py

@@ -1,7 +1,9 @@
 """Unit tests for the PAV backend in Annif"""
 
+import pytest
 import annif.backend
 import annif.corpus
+from annif.exception import NotSupportedException
 
 
 def test_pav_train(app, datadir, tmpdir, project):
@@ -23,6 +25,21 @@ def test_pav_train(app, datadir, tmpdir, project):
     assert datadir.join('pav-model-dummy-fi').size() > 0
 
 
+def test_pav_train_nodocuments(tmpdir, datadir, project):
+    pav_type = annif.backend.get_backend("pav")
+    pav = pav_type(
+        backend_id='pav',
+        params={'limit': 50, 'min-docs': 2, 'sources': 'dummy-fi'},
+        datadir=str(datadir))
+
+    empty_file = tmpdir.ensure('empty.tsv')
+    empty_document_corpus = annif.corpus.DocumentFile(str(empty_file))
+
+    with pytest.raises(NotSupportedException) as excinfo:
+        pav.train(empty_document_corpus, project)
+    assert 'training backend pav with no documents' in str(excinfo.value)
+
+
 def test_pav_initialize(app, datadir):
     pav_type = annif.backend.get_backend("pav")
     pav = pav_type(

tests/test_backend_vw_multi.py

@@ -55,6 +55,34 @@ def test_vw_multi_train_and_learn(datadir, document_corpus, project):
     assert modelfile.size() != old_size or modelfile.mtime() != old_mtime
 
 
+def test_vw_multi_train_and_learn_nodocuments(datadir, tmpdir, project):
+    vw_type = annif.backend.get_backend('vw_multi')
+    vw = vw_type(
+        backend_id='vw_multi',
+        params={
+            'chunksize': 4,
+            'learning_rate': 0.5,
+            'loss_function': 'hinge'},
+        datadir=str(datadir))
+
+    empty_file = tmpdir.ensure('empty.tsv')
+    empty_document_corpus = annif.corpus.DocumentFile(str(empty_file))
+
+    vw.train(empty_document_corpus, project)
+    assert datadir.join('vw-train.txt').exists()
+    assert datadir.join('vw-train.txt').size() == 0
+
+    # test online learning
+    modelfile = datadir.join('vw-model')
+
+    old_size = modelfile.size()
+
+    vw.learn(empty_document_corpus, project)
+
+    assert modelfile.size() == old_size
+    assert datadir.join('vw-train.txt').size() == 0
+
+
 def test_vw_multi_train_from_project(app, datadir, document_corpus, project):
     vw_type = annif.backend.get_backend('vw_multi')
     vw = vw_type(

tests/test_cli.py

@@ -4,6 +4,7 @@
 import random
 import re
 import os.path
+import pytest
 from click.testing import CliRunner
 import annif.cli
 
@@ -50,13 +51,12 @@ def test_list_projects_config_path_option():
 
 
 def test_list_projects_config_path_option_nonexistent():
-    nonexistent_file = "nonexistent.cfg"
-    result = runner.invoke(
-        annif.cli.cli, ["list-projects", "--projects", nonexistent_file])
-    assert not result.exception
-    assert result.exit_code == 0
-    assert 'Project configuration file "{}" is missing.'.format(
-        nonexistent_file) in result.output
+    failed_result = runner.invoke(
+        annif.cli.cli, ["list-projects", "--projects", "nonexistent.cfg"])
+    assert failed_result.exception
+    assert failed_result.exit_code != 0
+    assert 'Error: Invalid value for "-p" / "--projects": ' \
+           'File "nonexistent.cfg" does not exist.' in failed_result.output
 
 
 def test_show_project():
@@ -137,6 +137,16 @@ def test_loadvoc_rdf(testdatadir):
     assert testdatadir.join('vocabs/yso-fi/subjects').size() > 0
 
 
+def test_loadvoc_nonexistent_path():
+    failed_result = runner.invoke(
+        annif.cli.cli, [
+            'loadvoc', 'dummy-fi', 'nonexistent_path'])
+    assert failed_result.exception
+    assert failed_result.exit_code != 0
+    assert 'Invalid value for "SUBJECTFILE": ' \
+           'File "nonexistent_path" does not exist.' in failed_result.output
+
+
 def test_train(testdatadir):
     docfile = os.path.join(
         os.path.dirname(__file__),
@@ -168,6 +178,27 @@ def test_train_multiple(testdatadir):
     assert testdatadir.join('projects/tfidf-fi/tfidf-index').size() > 0
 
 
+def test_train_nonexistent_path():
+    failed_result = runner.invoke(
+        annif.cli.cli, [
+            'train', 'dummy-fi', 'nonexistent_path'])
+    assert failed_result.exception
+    assert failed_result.exit_code != 0
+    assert 'Invalid value for "[PATHS]...": ' \
+           'Path "nonexistent_path" does not exist.' in failed_result.output
+
+
+def test_train_no_path(caplog):
+    logger = annif.logger
+    logger.propagate = True
+    result = runner.invoke(
+        annif.cli.cli, [
+            'train', 'dummy-fi'])
+    assert not result.exception
+    assert result.exit_code == 0
+    assert 'Reading empty file' == caplog.records[0].message
+
+
 def test_learn(testdatadir):
     docfile = os.path.join(
         os.path.dirname(__file__),
@@ -190,6 +221,16 @@ def test_learn_notsupported(testdatadir):
     assert 'Learning not supported' in result.output
 
 
+def test_learn_nonexistent_path():
+    failed_result = runner.invoke(
+        annif.cli.cli, [
+            'learn', 'dummy-fi', 'nonexistent_path'])
+    assert failed_result.exception
+    assert failed_result.exit_code != 0
+    assert 'Invalid value for "[PATHS]...": ' \
+           'Path "nonexistent_path" does not exist.' in failed_result.output
+
+
 def test_suggest():
     result = runner.invoke(
         annif.cli.cli,
@@ -259,6 +300,17 @@ def test_index(tmpdir):
         'utf-8') == "<http://example.org/dummy>\tdummy\t1.0\n"
 
 
+def test_index_nonexistent_path():
+    failed_result = runner.invoke(
+        annif.cli.cli, [
+            'index', 'dummy-fi', 'nonexistent_path'])
+    assert failed_result.exception
+    assert failed_result.exit_code != 0
+    assert 'Invalid value for "DIRECTORY": ' \
+           'Directory "nonexistent_path" does not exist.' \
+           in failed_result.output
+
+
 def test_eval_label(tmpdir):
     tmpdir.join('doc1.txt').write('doc1')
     tmpdir.join('doc1.key').write('dummy')
@@ -362,6 +414,16 @@ def test_eval_docfile():
     assert result.exit_code == 0
 
 
+def test_eval_nonexistent_path():
+    failed_result = runner.invoke(
+        annif.cli.cli, [
+            'eval', 'dummy-fi', 'nonexistent_path'])
+    assert failed_result.exception
+    assert failed_result.exit_code != 0
+    assert 'Invalid value for "[PATHS]...": ' \
+           'Path "nonexistent_path" does not exist.' in failed_result.output
+
+
 def test_optimize_dir(tmpdir):
     tmpdir.join('doc1.txt').write('doc1')
     tmpdir.join('doc1.key').write('dummy')
@@ -398,3 +460,13 @@ def test_optimize_docfile(tmpdir):
             'optimize', 'dummy-fi', str(docfile)])
     assert not result.exception
     assert result.exit_code == 0
+
+
+def test_optimize_nonexistent_path():
+    failed_result = runner.invoke(
+        annif.cli.cli, [
+            'optimize', 'dummy-fi', 'nonexistent_path'])
+    assert failed_result.exception
+    assert failed_result.exit_code != 0
+    assert 'Invalid value for "[PATHS]...": ' \
+           'Path "nonexistent_path" does not exist.' in failed_result.output

tests/test_corpus.py

@@ -244,3 +244,9 @@ def test_docfile_gzipped(tmpdir):
 
     docs = annif.corpus.DocumentFile(str(docfile))
     assert len(list(docs.documents)) == 3
+
+
+def test_docfile_is_empty(tmpdir):
+    empty_file = tmpdir.ensure('empty.tsv')
+    docs = annif.corpus.DocumentFile(str(empty_file))
+    assert docs.is_empty()