Get version number w/o pkg_resources

This removes most of the usages of pkg_resources from the codebase, helping
the goal of getting rid of that completely.

With this change, version number is generated during install and embedded into
`__version__` which is then imported by root level `__init__`. From there,
it is used by other parts of the codebase when needed.

Generated `__version__` file is ignored and not tracked by git to prevent
unnecessary 'changes' messages and accidental commits of that file.

1 files changed, 10 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index 3e9f88545..01b834bd9 100755
--- a/setup.py
+++ b/setup.py
@@ -133,6 +133,12 @@ if not os.environ.get('BST_ARTIFACTS_ONLY', ''):
         'bst = buildstream._frontend:cli'
     ]
 
+_version_template = """\
+# coding: utf-8
+# file generated by setuptools_scm
+# don't change, don't track in version control
+__version__ = {version!r}
+"""
 
 #####################################################
 #    Monkey-patching setuptools for performance     #
@@ -176,7 +182,10 @@ ScriptWriter.get_args = get_args
 setup(name='BuildStream',
       description='A framework for modelling build pipelines in YAML',
       license='LGPL',
-      use_scm_version=True,
+      use_scm_version={
+          'write_to': "buildstream/__version__.py",
+          'write_to_template': _version_template,
+      },
       packages=find_packages(),
       package_data={'buildstream': ['plugins/*/*.py', 'plugins/*/*.yaml',
                                     'data/*.yaml', 'data/*.sh.in']},