mirror of https://github.com/cheat/cheat.git
83 lines
2.1 KiB
Python
83 lines
2.1 KiB
Python
from cheat import sheets
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from cheat import utils
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from cheat.utils import *
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import os
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import shutil
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import subprocess
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def copy(current_sheet_path, new_sheet_path):
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""" Copies a sheet to a new path """
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# attempt to copy the sheet to DEFAULT_CHEAT_DIR
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try:
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shutil.copy(current_sheet_path, new_sheet_path)
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# fail gracefully if the cheatsheet cannot be copied. This can happen if
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# DEFAULT_CHEAT_DIR does not exist
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except IOError:
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die ('Could not copy cheatsheet for editing.')
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def create_or_edit(sheet):
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""" Creates or edits a cheatsheet """
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# if the cheatsheet does not exist
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if not exists(sheet):
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create(sheet)
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# if the cheatsheet exists and is writeable...
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elif exists(sheet) and is_writable(sheet):
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edit(sheet)
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# if the cheatsheet exists but is not writable...
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elif exists(sheet) and not is_writable(sheet):
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# copy the cheatsheet to the home directory before editing
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copy(path(sheet), os.path.join(sheets.default_path(), sheet))
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edit(sheet)
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def create(sheet):
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""" Creates a cheatsheet """
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new_sheet_path = os.path.join(sheets.default_path(), sheet)
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try:
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subprocess.call([editor(), new_sheet_path])
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except OSError:
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die('Could not launch ' + editor())
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def edit(sheet):
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""" Opens a cheatsheet for editing """
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try:
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subprocess.call([editor(), path(sheet)])
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except OSError:
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die('Could not launch ' + editor())
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def exists(sheet):
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""" Predicate that returns true if the sheet exists """
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return sheet in sheets.get() and os.access(path(sheet), os.R_OK)
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def is_writable(sheet):
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""" Predicate that returns true if the sheet is writeable """
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return sheet in sheets.get() and os.access(path(sheet), os.W_OK)
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def path(sheet):
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""" Returns a sheet's filesystem path """
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return sheets.get()[sheet]
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def read(sheet):
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""" Returns the contents of the cheatsheet as a String """
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if not exists(sheet):
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die('No cheatsheet found for ' + sheet)
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with open (path(sheet)) as cheatfile:
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return cheatfile.read()
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