Attempting to build a tagged revision from a git repo fails, as snapcraft treats the tag as a branch and the clone fails attempting to clone a branch that does not exist. The exact same error is seen using source-branch, which indicates snapcraft is treating source-tag and source-branch as interchangable where in this particular case they are not. While you are there, git clone is very likely to fail so catching the CalledProcessError and printing an error more readable than a traceback would be a usability win. name: schemaspy version: 6.0.0-rc2 summary: SchemaSpy database documentation generation description: > SchemaSpy is a tool that analyzes the metadata of a schema in a database and generates a visual representation of it in a browser-displayable format. It lets you click through the hierarchy of database tables via child and parent table relationships as represented by both HTML links and entity-relationship diagrams. It’s also designed to help resolve the obtuse errors that a database sometimes gives related to failures due to constraints. It is free software that is distributed under the terms of the MIT License. grade: stable confinement: strict apps: schemaspy: command: schemaspy plugs: - network parts: schemaspy: plugin: maven source: https://github.com/schemaspy/schemaspy.git source-type: git source-tag: 6.0.0-rc2 Fails with: Pulling schemaspy Cloning into '/home/stub/snapcraft/schemaspy/parts/schemaspy/src'... fatal: Remote branch 6.0.0-rc2 not found in upstream origin Traceback (most recent call last): File "/usr/bin/snapcraft", line 9, in <module> load_entry_point('snapcraft==2.34', 'console_scripts', 'snapcraft')() File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 542, in load_entry_point return get_distribution(dist).load_entry_point(group, name) File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2569, in load_entry_point return ep.load() File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2229, in load return self.resolve() File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2235, in resolve module = __import__(self.module_name, fromlist=['__name__'], level=0) File "/usr/lib/python3/dist-packages/snapcraft/cli/__main__.py", line 19, in <module> run(prog_name='snapcraft') File "/usr/lib/python3/dist-packages/click/core.py", line 716, in __call__ return self.main(*args, **kwargs) File "/usr/lib/python3/dist-packages/click/core.py", line 696, in main rv = self.invoke(ctx) File "/usr/lib/python3/dist-packages/click/core.py", line 1037, in invoke return Command.invoke(self, ctx) File "/usr/lib/python3/dist-packages/click/core.py", line 889, in invoke return ctx.invoke(self.callback, **ctx.params) File "/usr/lib/python3/dist-packages/click/core.py", line 534, in invoke return callback(*args, **kwargs) File "/usr/lib/python3/dist-packages/click/decorators.py", line 17, in new_func return f(get_current_context(), *args, **kwargs) File "/usr/lib/python3/dist-packages/snapcraft/cli/__init__.py", line 110, in run ctx.forward(lifecyclecli.commands['snap']) File "/usr/lib/python3/dist-packages/click/core.py", line 552, in forward return self.invoke(cmd, **kwargs) File "/usr/lib/python3/dist-packages/click/core.py", line 534, in invoke return callback(*args, **kwargs) File "/usr/lib/python3/dist-packages/snapcraft/cli/lifecycle.py", line 132, in snap project_options, directory=directory, output=output) File "/usr/lib/python3/dist-packages/snapcraft/internal/lifecycle.py", line 349, in snap execute('prime', project_options) File "/usr/lib/python3/dist-packages/snapcraft/internal/lifecycle.py", line 130, in execute _Executor(config, project_options).run(step, part_names) File "/usr/lib/python3/dist-packages/snapcraft/internal/lifecycle.py", line 225, in run self._run_step(step, part, part_names) File "/usr/lib/python3/dist-packages/snapcraft/internal/lifecycle.py", line 262, in _run_step getattr(part, step)() File "/usr/lib/python3/dist-packages/snapcraft/internal/pluginhandler/__init__.py", line 251, in pull self.source_handler.pull() File "/usr/lib/python3/dist-packages/snapcraft/internal/sources/_git.py", line 145, in pull self._clone_new() File "/usr/lib/python3/dist-packages/snapcraft/internal/sources/_git.py", line 134, in _clone_new **self._call_kwargs) File "/usr/lib/python3.5/subprocess.py", line 581, in check_call raise CalledProcessError(retcode, cmd) subprocess.CalledProcessError: Command '['git', 'clone', '--recursive', '--branch', '6.0.0-rc2', 'https://github.com/schemaspy/schemaspy.git', '/home/stub/snapcraft/schemaspy/parts/schemaspy/src']' returned non-zero exit status 128