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snapshot 2020-12-20 17:32:57.384910

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This commit is contained in:
Jan Petykiewicz 2020-12-20 17:32:57 -08:00
commit 2859c7c2c7
5 changed files with 63 additions and 37 deletions
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29
.flake8 Normal file
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@ -0,0 +1,29 @@
[flake8]
ignore =
# E501 line too long
E501,
# W391 newlines at EOF
W391,
# E241 multiple spaces after comma
E241,
# E302 expected 2 newlines
E302,
# W503 line break before binary operator (to be deprecated)
W503,
# E265 block comment should start with '# '
E265,
# E123 closing bracket does not match indentation of opening bracket's line
E123,
# E124 closing bracket does not match visual indentation
E124,
# E221 multiple spaces before operator
E221,
# E201 whitespace after '['
E201,
# E741 ambiguous variable name 'I'
E741,
per-file-ignores =
# F401 import without use
*/__init__.py: F401,

4
.gitignore vendored
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@ -1,5 +1,3 @@
.mypy_cache
__pycache__/
*.pyc
@ -8,5 +6,5 @@ __pycache__/
build/
dist/
*.egg-info/
.mypy_cache

4
lethe/__init__.py
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@ -3,8 +3,8 @@ Git snapshotting tool
"""
from .lethe import (
main, snap, snap_ref, snap_tree, find_merge_base, deref_symref,
update_ref, commit_tree, get_tree, get_commit, get_obj, get_root, get_latest_commit,
shorten_hash, _run,
update_ref, commit_tree, get_tree, get_commit, get_obj,
shorten_hash, get_root, get_latest_commit,
)
from .VERSION import __version__

61
lethe/lethe.py
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@ -3,18 +3,18 @@
Git snapshotting tool
"""
from typing import List, Union
from typing import List, Union, Optional
import subprocess
import tempfile
import datetime
import argparse
from itertools import chain
import sys
def _run(command: Union[str, List[str]], **kwargs) -> str:
"""
Wrapper for subprocess.run():
Wrapper for `subprocess.run()`:
- Accepts args as either a list of strings or space-delimited string
- Captures and returns stdout
"""
@ -27,7 +27,7 @@ def _run(command: Union[str, List[str]], **kwargs) -> str:
return result.stdout.decode().strip()
def get_latest_commit(short: bool=True, cwd: str=None) -> str:
def get_latest_commit(short: bool = True, cwd: Optional[str] = None) -> str:
"""
Get the most recent commit's hash.
This includes non-lethe commits.
@ -36,14 +36,14 @@ def get_latest_commit(short: bool=True, cwd: str=None) -> str:
return _run('git log --all -1 --format=%{}'.format(fmt), cwd=cwd)
def shorten_hash(sha: str, cwd: str=None) -> str:
def shorten_hash(sha: str, cwd: Optional[str] = None) -> str:
"""
Get the short version of a hash
"""
return _run('git rev-parse --short {}'.format(sha), cwd=cwd)
def get_root(cwd: str=None) -> str:
def get_root(cwd: Optional[str] = None) -> str:
"""
Get the root directory of a git repository
"""
@ -53,7 +53,7 @@ def get_root(cwd: str=None) -> str:
return root
def get_obj(ref: str, cwd: str=None) -> str:
def get_obj(ref: str, cwd: Optional[str] = None) -> str:
"""
Transform a ref into its corresponding hash using git-rev-parse
"""
@ -61,14 +61,14 @@ def get_obj(ref: str, cwd: str=None) -> str:
return sha
def get_commit(ref: str, cwd: str=None) -> str:
def get_commit(ref: str, cwd: Optional[str] = None) -> str:
"""
Transform a ref to a commit into its corresponding hash using git-rev-parse
"""
return get_obj(ref, cwd=cwd)
def get_tree(ref: str, cwd: str=None) -> str:
def get_tree(ref: str, cwd: Optional[str] = None) -> str:
"""
Take a ref to a commit, and return the hash of the tree it points to
"""
@ -77,8 +77,8 @@ def get_tree(ref: str, cwd: str=None) -> str:
def commit_tree(tree: str,
parents: List[str],
message: str = None,
cwd: str = None,
message: Optional[str] = None,
cwd: Optional[str] = None,
) -> str:
"""
Create a commit pointing to the given tree, with the specified parent commits and message.
@ -94,13 +94,13 @@ def commit_tree(tree: str,
def update_ref(target_ref: str,
target_commit: str,
old_commit: str = None,
old_commit: Optional[str] = None,
message: str = 'new snapshot',
cwd: str = None,
cwd: Optional[str] = None,
) -> str:
"""
Update target_ref to point to target_commit, optionally verifying that
it points old_commit before the update.
Update `target_ref` to point to `target_commit`, optionally verifying that
it points `old_commit` before the update.
Returns the resulting ref.
"""
cmd = ['git', 'update-ref', '-m', message, target_ref, target_commit]
@ -110,14 +110,14 @@ def update_ref(target_ref: str,
return result_ref
def deref_symref(ref: str, cwd: str=None) -> str:
def deref_symref(ref: str, cwd: Optional[str] = None) -> str:
"""
Dereference a symbolic ref
"""
return _run(['git', 'symbolic-ref', '--quiet', ref], cwd=cwd)
def find_merge_base(commits: List[str], cwd: str=None) -> str:
def find_merge_base(commits: List[str], cwd: Optional[str] = None) -> str:
"""
Find the "best common ancestor" commit.
"""
@ -131,7 +131,7 @@ def find_merge_base(commits: List[str], cwd: str=None) -> str:
return base
def snap_tree(cwd: str=None) -> str:
def snap_tree(cwd: Optional[str] = None) -> str:
"""
Create a new tree, consisting of all non-ignored files in the repository.
Return the hash of the tree.
@ -147,11 +147,11 @@ def snap_tree(cwd: str=None) -> str:
def snap_ref(parent_refs: List[str],
target_refs: List[str],
message: str = None,
cwd: str = None,
message: Optional[str] = None,
cwd: Optional[str] = None,
) -> str:
"""
<message> is used as the commit message.
`message` is used as the commit message.
"""
new_tree = snap_tree(cwd=cwd)
parent_commits = [c for c in [get_commit(p, cwd=cwd) for p in parent_refs] if c]
@ -176,29 +176,28 @@ def snap_ref(parent_refs: List[str],
return commit
def snap(parent_refs: List[str] = None,
target_refs: List[str] = None,
message: str = None,
cwd: str = None,
def snap(parent_refs: Optional[List[str]] = None,
target_refs: Optional[List[str]] = None,
message: Optional[str] = None,
cwd: Optional[str] = None,
) -> str:
"""
Create a new commit of all non-ignored files in the repository.
<parent_refs> default to ['HEAD'].
If there are any symbolic refs in <parent_refs>, the refs
`parent_refs` default to `['HEAD']`.
If there are any symbolic refs in `parent_refs`, the refs
they point to are added to <parent_refs>.
All commits pointed to by existing <parent_refs> and <target_refs>,
All commits pointed to by existing `parent_refs` and `target_refs`,
become parents of the newly created commit.
<target_refs> are created/updated to point the commit.
`target_refs` are created/updated to point the commit.
Default is
'refs/lethe/head_name' for each parent ref of the form
'refs/heads/head_name', and
'refs/lethe/path/to/ref' for each parent ref of the form
'refs/path/to/ref'.
<message> is used as the commit message.
`message` is used as the commit message.
"""
if parent_refs is None:
parent_refs = ['HEAD']

2
setup.py
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@ -9,6 +9,7 @@ with open('README.md', 'rt') as f:
with open('lethe/VERSION.py', 'rt') as f:
version = f.readlines()[2].strip()
setup(name='lethe',
version=version,
description='Git-based snapshotting',
@ -41,7 +42,6 @@ setup(name='lethe',
'traceability',
],
classifiers=[
'Programming Language :: Python',
'Programming Language :: Python :: 3',
'Development Status :: 4 - Beta',
'Environment :: Other Environment',