Refactor installer to use pyproject.toml; Eliminate shlib as dependency

clean

@@ -8,4 +8,4 @@ set nonomatch
 rm -f *.pyc *.pyo */*.pyc */*.pyo .test*.sum expected result install.out
 rm -rf build *.egg-info dist __pycache__ */__pycache__ .coverage
 rm -rf tests/home/.python-eggs .eggs tests/.coverage htmlcov tests/htmlcov
-rm -rf .cache tests/.cache tests/home/.cache .tox .hypothesis .pytest_cache
+rm -rf .cache tests/.cache tests/home/.cache .tox .hypothesis .pytest_cache */.pytest_cache

emborg/command.py

@@ -41,7 +41,7 @@
     warn,
 )
 from quantiphy import Quantity, UnitConversion, QuantiPhyError
-from shlib import (
+from .shlib import (
     Cmd, Run, cwd, mkdir, rm, set_prefs as set_shlib_prefs, split_cmd, to_path
 )
 from time import sleep

emborg/overdue.py

@@ -44,10 +44,8 @@
 import pwd
 import socket
 from textwrap import dedent
-
 import arrow
 from docopt import docopt
-
 from inform import (
     Color,
     Error,
@@ -61,11 +59,11 @@
     terminate,
     warn,
 )
-from shlib import Run, to_path, set_prefs as set_shlib_prefs
 
 from . import __released__, __version__
 from .preferences import CONFIG_DIR, DATA_DIR, OVERDUE_FILE, OVERDUE_LOG_FILE
 from .python import PythonFile
+from .shlib import Run, to_path, set_prefs as set_shlib_prefs
 
 # Globals {{{1
 set_shlib_prefs(use_inform=True, log_cmd=True)

emborg/patterns.py

@@ -19,7 +19,7 @@
 # Imports {{{1
 from os.path import expanduser as expand_user
 from inform import Error, error, log
-from shlib import to_path
+from .shlib import to_path
 
 
 # Globals {{{1

emborg/preferences.py

@@ -18,7 +18,6 @@
 
 # Imports {{{1
 from textwrap import dedent
-
 from appdirs import user_config_dir, user_data_dir
 
 # Preferences {{{1

emborg/python.py

@@ -22,7 +22,7 @@
 
 # Imports {{{1
 from inform import Error, display, full_stop, narrate, os_error
-from shlib import cp, to_path
+from .shlib import cp, to_path
 
 
 # PythonFile class {{{1

emborg/settings.py

@@ -46,7 +46,7 @@
     render,
     warn,
 )
-from shlib import (
+from .shlib import (
     Run, cd, cwd, getmod, mv, render_command, rm, to_path,
     set_prefs as set_shlib_prefs
 )
@@ -730,8 +730,7 @@ def run_borg(
             ends_at = arrow.now()
             log("ends at: {!s}".format(ends_at))
             log("elapsed = {!s}".format(ends_at - starts_at))
-        if borg.status:
-            narrate("Borg exit status:", borg.status)
+        narrate("Borg exit status:", borg.status)
         if borg.status == 1 and borg.stderr:
             warnings = borg.stderr.partition(72*'-')[0]
             warn('warning emitted by Borg:', codicil=warnings)