mirror of
https://github.com/Erreur32/cheat.git
synced 2024-11-16 08:58:35 +01:00
e391cf2f01
Previously, `cheat` would exit if run by `root`. The rationale was: If `cheat` was run by an unprivileged user (`chris`, for example), the `$DEFAULT_CHEAT_DIR` would default to `/home/chris/.cheat`. If cheat was run via `sudo`, however, the `$DEFAULT_CHEAT_DIR` would suddenly be `/root/.cheat`. Presuming that those individual user cheat dirs actually contained cheat sheets, this could cause confusion, because cheat sheets accessible to one user (`chris`) would not be accessible to the other (`root`). Thus, cheatsheets would appear and disappear, depending on which user was running `cheat`. (This would only be an issue, of course, for cheat sheets that existed within the respective users' cheat dirs. System-wide cheat sheets would be unaffected.) `cheat` was thus programmed to gracefully fail when run as `root` to prevent that possible confusion. However, I'm backing away from that reasoning, because: 1. It's causing a headache for real users who'd like to run `cheat` as root 2. Other venerable programs (`vim`, etc.) suffer from the same problem, but nobody seems to mind enough to do anything about it. Thus, I suppose the laissez-faire approach is essentially the sanctioned "solution" to this problem. 3. Users sufficently troubled by this confusion may rememdy the problem manually by setting environment variables (`$DEFAULT_CHEAT_DIR`, etc.) Thus, `cheat` no longer complains if run by `root`. Version-bumped to 2.1.0.
101 lines
3 KiB
Python
101 lines
3 KiB
Python
from cheat import cheatsheets
|
|
from cheat.utils import *
|
|
import os
|
|
|
|
# @kludge: it breaks the functional paradigm to a degree, but declaring this
|
|
# var here (versus within get()) gives us a "poor man's" memoization on the
|
|
# call to get(). This, in turn, spares us from having to call out to the
|
|
# filesystem more than once.
|
|
cheats = {}
|
|
|
|
|
|
def default_path():
|
|
""" Returns the default cheatsheet path """
|
|
|
|
# determine the default cheatsheet dir
|
|
default_sheets_dir = os.environ.get('DEFAULT_CHEAT_DIR') or os.path.join(os.path.expanduser('~'), '.cheat')
|
|
|
|
# create the DEFAULT_CHEAT_DIR if it does not exist
|
|
if not os.path.isdir(default_sheets_dir):
|
|
try:
|
|
# @kludge: unclear on why this is necessary
|
|
os.umask(0000)
|
|
os.mkdir(default_sheets_dir)
|
|
|
|
except OSError:
|
|
die('Could not create DEFAULT_CHEAT_DIR')
|
|
|
|
# assert that the DEFAULT_CHEAT_DIR is readable and writable
|
|
if not os.access(default_sheets_dir, os.R_OK):
|
|
die('The DEFAULT_CHEAT_DIR (' + default_sheets_dir +') is not readable.')
|
|
if not os.access(default_sheets_dir, os.W_OK):
|
|
die('The DEFAULT_CHEAT_DIR (' + default_sheets_dir +') is not writeable.')
|
|
|
|
# return the default dir
|
|
return default_sheets_dir
|
|
|
|
|
|
def get():
|
|
""" Assembles a dictionary of cheatsheets as name => file-path """
|
|
|
|
# if we've already reached out to the filesystem, just return the result
|
|
# from memory
|
|
if cheats:
|
|
return cheats
|
|
|
|
# otherwise, scan the filesystem
|
|
for cheat_dir in reversed(paths()):
|
|
cheats.update(
|
|
dict([
|
|
(cheat, os.path.join(cheat_dir, cheat))
|
|
for cheat in os.listdir(cheat_dir)
|
|
if not cheat.startswith('.')
|
|
and not cheat.startswith('__')
|
|
])
|
|
)
|
|
|
|
return cheats
|
|
|
|
|
|
def paths():
|
|
""" Assembles a list of directories containing cheatsheets """
|
|
sheet_paths = [
|
|
default_path(),
|
|
cheatsheets.sheets_dir()[0],
|
|
]
|
|
|
|
# merge the CHEATPATH paths into the sheet_paths
|
|
if 'CHEATPATH' in os.environ and os.environ['CHEATPATH']:
|
|
for path in os.environ['CHEATPATH'].split(os.pathsep):
|
|
if os.path.isdir(path):
|
|
sheet_paths.append(path)
|
|
|
|
if not sheet_paths:
|
|
die('The DEFAULT_CHEAT_DIR dir does not exist or the CHEATPATH is not set.')
|
|
|
|
return sheet_paths
|
|
|
|
|
|
def list():
|
|
""" Lists the available cheatsheets """
|
|
sheet_list = ''
|
|
pad_length = max([len(x) for x in get().keys()]) + 4
|
|
for sheet in sorted(get().items()):
|
|
sheet_list += sheet[0].ljust(pad_length) + sheet[1] + "\n"
|
|
return sheet_list
|
|
|
|
|
|
def search(term):
|
|
""" Searches all cheatsheets for the specified term """
|
|
result = ''
|
|
|
|
for cheatsheet in sorted(get().items()):
|
|
match = ''
|
|
for line in open(cheatsheet[1]):
|
|
if term in line:
|
|
match += ' ' + line
|
|
|
|
if not match == '':
|
|
result += cheatsheet[0] + ":\n" + match + "\n"
|
|
|
|
return result
|