patch version bump

* 'master' of https://github.com/yafp/cheat:
  20151102 - Added 3 more cheats into the new apt cheatsheet
  20151102 - Adding a cheatsheet for at (apt vs apt-get)

.gitignore

@@ -1,4 +1,5 @@
 *.pyc
 MANIFEST
 build
+cheat.egg-info
 dist

bin/cheat

@@ -38,7 +38,7 @@ from docopt import docopt
 
 if __name__ == '__main__':
     # parse the command-line options
-    options = docopt(__doc__, version='cheat 2.1.4')
+    options = docopt(__doc__, version='cheat 2.1.19')
 
     # list directories
     if options['--directories']:

cheat/cheatsheets/apt

@@ -0,0 +1,23 @@
+# To search a package:
+apt search package
+
+# To show package informations:
+apt show package
+
+# To fetch package list:
+apt update
+
+# To download and install updates without installing new package:
+apt upgrade
+
+# To download and install the updates AND install new necessary packages:
+apt dist-upgrade
+
+# Full command:
+apt update && apt dist-upgrade
+
+# To install a new package(s):
+apt install package(s)
+
+# To uninstall package(s)
+apt remove package(s)

cheat/cheatsheets/apt-get

@@ -23,3 +23,6 @@ apt-get -o Dir::Cache="/path/to/destination/dir/" -o Dir::Cache::archives="./" i
 
 # Show apt-get installed packages.
 grep 'install ' /var/log/dpkg.log
+
+# Silently keep old configuration during batch updates
+apt-get update -o DPkg::Options::='--force-confold' ...

cheat/cheatsheets/awk

@@ -1,2 +1,11 @@
 # sum integers from a file or stdin, one integer per line:
 printf '1\n2\n3\n' | awk '{ sum += $1} END {print sum}'
+
+# using specific character as separator to sum integers from a file or stdin
+printf '1:2:3' | awk -F ":" '{print $1+$2+$3}'
+
+# print a multiplication table
+seq 9 | sed 'H;g' | awk -v RS='' '{for(i=1;i<=NF;i++)printf("%dx%d=%d%s", i, NR, i*NR, i==NR?"\n":"\t")}'
+
+# Specify output separator character
+printf '1 2 3' | awk 'BEGIN {OFS=":"}; {print $1,$2,$3}'

cheat/cheatsheets/bash

@@ -18,3 +18,10 @@ set -x
 
 # Turn off debugging:
 set +x
+
+# Retrieve N-th piped command exit status
+printf 'foo' | fgrep 'foo' | sed 's/foo/bar/'
+echo ${PIPESTATUS[0]}  # replace 0 with N
+
+# Lock file:
+( set -o noclobber; echo > my.lock ) || echo 'Failed to create lock file'

cheat/cheatsheets/csplit

@@ -0,0 +1,5 @@
+# Split a file based on pattern
+csplit input.file '/PATTERN/'
+
+# Use prefix/suffix to improve resulting file names
+csplit -f 'prefix-' -b '%d.extension' input.file '/PATTERN/' '{*}'

cheat/cheatsheets/cups

@@ -0,0 +1,22 @@
+# Manage printers through CUPS:
+http://localhost:631 (in web browser)
+
+# Print file from command line
+lp myfile.txt
+
+# Display print queue
+lpq
+
+# Remove print job from queue
+lprm 545
+or
+lprm -
+
+# Print log location
+/var/log/cups
+
+# Reject new jobs
+cupsreject printername
+
+# Accept new jobs
+cupsaccept printername

cheat/cheatsheets/date

@@ -1,2 +1,5 @@
-# Printout date in format suitable for affixing to file names
+# Print date in format suitable for affixing to file names
 date +"%Y%m%d_%H%M%S"
+
+# Convert Unix timestamp to Date
+date -d @1440359821

cheat/cheatsheets/docker

@@ -19,6 +19,9 @@ docker inspect --format {{.State.Pid}} <container_name_or_ID>
 # http://nathanleclaire.com/blog/2014/07/12/10-docker-tips-and-tricks-that-will-make-you-sing-a-whale-song-of-joy/
 docker inspect --format='{{json .Volumes}}' <container_id> | python -mjson.tool
 
+# Copy files/folders between a container and your host
+docker cp foo.txt mycontainer:/foo.txt
+
 # list currently running containers
 docker ps
 
@@ -26,4 +29,4 @@ docker ps
 docker ps -a
 
 # list all images
-docker images
+docker images

cheat/cheatsheets/du

@@ -1,2 +1,5 @@
 # To sort directories/files by size
 du -sk *| sort -rn
+
+# To show cumulative humanreadable size
+du -sh

cheat/cheatsheets/ffmpeg

@@ -0,0 +1,12 @@
+# Print file metadata etc.
+ffmpeg -i path/to/file.ext
+
+# Convert all m4a files to mp3
+for f in *.m4a; do ffmpeg -i "$f" -acodec libmp3lame -ab 320k "${f%.m4a}.mp3"; done
+
+# Listen to 10 seconds of audio from a video file
+#
+# -ss : start time
+# -t  : seconds to cut
+# -autoexit : closes ffplay as soon as the audio finishes
+ffmpeg -ss 00:34:24.85 -t 10 -i path/to/file.mp4 -f mp3 pipe:play | ffplay -i pipe:play -autoexit

cheat/cheatsheets/git

@@ -1,4 +1,4 @@
-# To set your identify:
+# To set your identity:
 git config --global user.name "John Doe"
 git config --global user.email johndoe@example.com
 
@@ -17,9 +17,25 @@ git commit -m "Your commit message"
 # To edit previous commit message
 git commit --amend
 
+# Git commit in the past
+git commit --date="`date --date='2 day ago'`"
+git commit --date="Jun 13 18:30:25 IST 2015"
+# more recent versions of Git also support --date="2 days ago" directly
+
+# To change the date of an existing commit
+git filter-branch --env-filter \
+    'if [ $GIT_COMMIT = 119f9ecf58069b265ab22f1f97d2b648faf932e0 ]
+     then
+         export GIT_AUTHOR_DATE="Fri Jan 2 21:38:53 2009 -0800"
+         export GIT_COMMITTER_DATE="Sat May 19 01:01:01 2007 -0700"
+     fi'
+
 # To removed staged and working directory changes
 git reset --hard
 
+# To go 2 commits back
+git reset --hard HEAD~2
+
 # To remove untracked files
 git clean -f -d
 
@@ -35,6 +51,9 @@ git push git@github.com:username/project.git
 # To delete the branch "branch_name"
 git branch -D branch_name
 
+# To make an exisiting branch track a remote branch
+git branch -u upstream/foo
+
 # To see who commited which line in a file
 git blame filename
 
@@ -51,3 +70,37 @@ git show 83fb499:path/fo/file.ext                       # Shows the file as it a
 git diff branch_1 branch_2                              # Check difference between branches
 git log                                                 # Show all the commits
 git status                                              # Show the changes from last commit
+
+# Commit history of a set of files
+git log --pretty=email --patch-with-stat --reverse --full-index -- Admin\*.py > Sripts.patch
+
+# Import commits from another repo
+git --git-dir=../some_other_repo/.git format-patch -k -1 --stdout <commit SHA> | git am -3 -k
+
+# View commits that will be pushed
+git log @{u}..
+
+# View changes that are new on a feature branch
+git log -p feature --not master
+git diff master...feature
+
+# Interactive rebase for the last 7 commits
+git rebase -i @~7
+
+# Diff files WITHOUT considering them a part of git
+# This can be used to diff files that are not in a git repo!
+git diff --no-index path/to/file/A path/to/file/B
+
+# To pull changes while overwriting any local commits
+git fetch --all
+git reset --hard origin/master
+
+# Update all your submodules
+git submodule update --init --recursive
+
+# Perform a shallow clone to only get latest commits
+# (helps save data when cloning large repos)
+git clone --depth 1 <remote-url>
+
+# To unshallow a clone
+git pull --unshallow

cheat/cheatsheets/grep

@@ -1,13 +1,13 @@
-# Basic:
+# Search a file for a pattern
 grep pattern file
 
-# case nonsensitive research:
-grep -i pattern file
+# Case insensitive search (with line numbers)
+grep -in pattern file
 
 # Recursively grep for string <pattern> in folder:
 grep -R pattern folder
 
-# Getting pattern from file (one by line):
+# Read search patterns from a file (one per line)
 grep -f pattern_file file
 
 # Find lines NOT containing pattern
@@ -17,7 +17,7 @@ grep -v pattern file
 grep "^00" file  #Match lines starting with 00
 grep -E "[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}" file  #Find IP add
 
-# Find all files who contain {pattern} in the directory {directory}.
+# Find all files which match {pattern} in {directory}
 # This will show: "file:line my research"
 grep -rnw 'directory' -e "pattern"
 

cheat/cheatsheets/hardware-info

@@ -0,0 +1,32 @@
+# Display all hardware details
+sudo lshw
+
+# List currently loaded kernel modules
+lsmod
+
+# List all modules available to the system
+find /lib/modules/$(uname -r) -type f -iname "*.ko"
+
+# Load a module into kernel
+modprobe modulename
+
+# Remove a module from kernel 
+modprobe -r modulename
+
+# List devices connected via pci bus
+lspci
+
+# Debug output for pci devices (hex)
+lspci -vvxxx
+
+# Display cpu hardware stats
+cat /proc/cpuinfo
+
+# Display memory hardware stats
+cat /proc/meminfo
+
+# Output the kernel ring buffer
+dmesg
+
+# Ouput kernel messages
+dmesg --kernel

cheat/cheatsheets/jq

@@ -0,0 +1,13 @@
+# Pretty print the json
+jq "." < filename.json
+
+# Access the value at key "foo"
+jq '.foo'
+
+# Access first list item
+jq '.[0]'
+
+# Slice & Dice
+jq '.[2:4]'
+jq '.[:3]'
+jq '.[-2:]'

cheat/cheatsheets/jrnl

@@ -0,0 +1,25 @@
+# Add entry to default jrnl (from your configured text editor)
+jrnl
+
+# Add entry to default jrnl
+jrnl Write entry here.
+
+# List of tags
+jrnl --tags
+
+# Entries per tag
+jrnl @tag
+
+# Export jrnl as json
+jrnl --export json
+
+# Entries in a timeframe
+jrnl -from 2009 -until may
+
+# Add Sublime text to .jrnl_config
+
+# Windows
+"editor": "F:\\Powerpack\\Sublime\\sublime_text.exe -w"
+
+# Linux
+"editor": "/usr/bin/sublime -w"

cheat/cheatsheets/lib

@@ -0,0 +1,23 @@
+# Display available libraries
+ldconfig -p
+
+# Update library resources
+ldconfig
+
+# Display libraries and file location
+ldd
+
+# Libraries available to apps in real-time
+"Dynamic Libraries" (.so.)
+
+# Libraries only available to apps when installed (imported)
+"Static Libraries" (.a.)
+
+# Standard (usual) library file location
+/lib
+
+# Sofware-accessible source for library info 
+/etc/ld.so.cache 	# (binary)
+
+# Human-readable source for library info
+/etc/ld.so.conf 	# (points to /etc/ld.so.conf.d)

cheat/cheatsheets/ln

@@ -1,2 +1,5 @@
 # To create a symlink:
 ln -s path/to/the/target/directory name-of-symlink
+
+# Symlink, while overwriting existing destination files
+ln -sf /some/dir/exec /usr/bin/exec

cheat/cheatsheets/ls

@@ -9,3 +9,9 @@ ls -lh
 
 # Display files, sorted by size
 ls -S
+
+# Display directories only
+ls -d */
+
+# Display directories only, include hidden
+ls -d .*/ */

cheat/cheatsheets/man

@@ -0,0 +1,5 @@
+# Convert a man page to pdf
+man -t bash | ps2pdf - bash.pdf
+
+# View the ascii chart
+man 7 ascii

cheat/cheatsheets/markdown

@@ -35,6 +35,9 @@ ___
 # links
 This is [an example](http://example.com "Title") inline link.
 
+# image
+![Alt Text](/path/to/file.png)
+
 # emphasis
 *em* _em_
 

cheat/cheatsheets/more

@@ -0,0 +1,3 @@
+# To show the file start at line number 5
+more +5 file
+

cheat/cheatsheets/mysql

@@ -12,3 +12,8 @@ CREATE DATABASE owa CHARACTER SET utf8 COLLATE utf8_general_ci;
 
 # To add a user and give rights on the given database
 GRANT ALL PRIVILEGES ON database.* TO 'user'@'localhost'IDENTIFIED BY 'password' WITH GRANT OPTION;
+
+# To list the privileges granted to the account that you are using to connect to the server. Any of the 3 statements will work. 
+SHOW GRANTS FOR CURRENT_USER();
+SHOW GRANTS;
+SHOW GRANTS FOR CURRENT_USER;

cheat/cheatsheets/mysqldump

@@ -1,16 +1,16 @@
- # To dump a database to a file (Note that your password will appear in your command history!):
+# To dump a database to a file (Note that your password will appear in your command history!):
 mysqldump -uusername -ppassword the-database > db.sql
 
 # To dump a database to a file:
 mysqldump -uusername -p the-database > db.sql
 
- # To dump a database to a .tgz file (Note that your password will appear in your command history!):
+# To dump a database to a .tgz file (Note that your password will appear in your command history!):
 mysqldump -uusername -ppassword the-database | gzip -9 > db.sql
 
 # To dump a database to a .tgz file:
 mysqldump -uusername -p the-database | gzip -9 > db.sql
 
- # To dump all databases to a file (Note that your password will appear in your command history!):
+# To dump all databases to a file (Note that your password will appear in your command history!):
 mysqldump -uusername -ppassword --all-databases > all-databases.sql
 
 # To dump all databases to a file:

cheat/cheatsheets/nova

@@ -0,0 +1,20 @@
+# To list VMs on current tenant:
+nova list
+
+# To list VMs of all tenants (admin user only):
+nova list --all-tenants
+
+# To boot a VM on a specific host:
+nova boot --nic net-id=<net_id> \
+          --image <image_id> \
+          --flavor <flavor> \
+          --availability-zone nova:<host_name> <vm_name>
+
+# To stop a server
+nova stop <server>
+
+# To start a server
+nova start <server>
+
+# To attach a network interface to a specific VM:
+nova interface-attach --net-id <net_id> <server>

cheat/cheatsheets/ntp

@@ -0,0 +1,33 @@
+# Verify ntpd running:
+service ntp status
+
+# Start ntpd if not running:
+service ntp start
+
+# Display current hardware clock value:
+sudo hwclock -r
+
+# Apply system time to hardware time:
+sudo hwclock --systohc
+
+# Apply hardware time to system time:
+sudo hwclock --hctosys
+
+# Set hwclock to local time:
+sudo hwclock --localtime
+
+# Set hwclock to UTC:
+sudo hwclock --utc
+
+# Set hwclock manually:
+sudo hwclock --set --date="8/10/15 13:10:05"
+
+# Query surrounding stratum time servers
+ntpq -pn
+
+# Config file:
+/etc/ntp.conf
+
+# Driftfile:
+location of "drift" of your system clock compared to ntp servers
+/var/lib/ntp/ntp.drift

cheat/cheatsheets/numfmt

@@ -0,0 +1,2 @@
+# Convert bytes to Human readable format
+numfmt --to=iec --suffix=B --padding=7 1048576

cheat/cheatsheets/openssl

@@ -19,3 +19,6 @@ openssl x509 -text -noout -in server.crt
 echo | openssl s_client -connect <hostname>:443 2> /dev/null | \
 awk '/-----BEGIN/,/END CERTIFICATE-----/' | \
 openssl x509 -noout -enddate
+
+# Generate Diffie-Hellman parameters:
+openssl dhparam -outform PEM -out dhparams.pem 2048

cheat/cheatsheets/paste

@@ -0,0 +1,15 @@
+# Concat columns from files
+paste file1 file2 ...
+
+# List the files in the current directory in three columns:
+ls | paste - - -
+
+# Combine pairs of lines from a file into single lines:
+paste -s -d '\t\n' myfile
+
+# Number the lines in a file, similar to nl(1):
+sed = myfile | paste -s -d '\t\n' - -
+
+# Create a colon-separated list of directories named bin,
+# suitable for use in the PATH environment variable:
+find / -name bin -type d | paste -s -d : -

cheat/cheatsheets/ping

@@ -0,0 +1,8 @@
+# ping a host with a total count of 15 packets overall.    
+ping -c 15 www.example.com
+
+# ping a host with a total count of 15 packets overall, one every .5 seconds (faster ping). 
+ping -c 15 -i .5 www.example.com
+
+# test if a packet size of 1500 bytes is supported (to check the MTU for example)
+ping -s 1500 -c 10 -M do www.example.com

cheat/cheatsheets/pip

@@ -0,0 +1,21 @@
+# Search for packages
+pip search SomePackage
+
+# Install some packages
+pip install SomePackage
+
+# Output and install packages in a requirement file
+pip freeze > requirements.txt
+pip install -r requirements.txt
+
+# Show details of a package
+pip show SomePackage
+
+# List outdated packages
+pip list --outdated
+
+# Upgrade all outdated packages, thanks to http://stackoverflow.com/a/3452888
+pip freeze --local | grep -v '^\-e' | cut -d = -f 1 | xargs -n1 pip install -U
+
+# Install specific version of a package
+pip install -I SomePackage1==1.1.0 'SomePackage2>=1.0.4'

cheat/cheatsheets/rpm

@@ -4,11 +4,28 @@ rpm -ivh <rpm>
 # To remove a package:
 rpm -e <package>
 
+# To remove a package, but not its dependencies
+rpm -e --nodeps <package>
+
 # To find what package installs a file:
 rpm -qf </path/to/file>
 
 # To find what files are installed by a package:
+rpm -ql <package>
 rpm -qpl <rpm>
 
+# To find what packages require a package or file:
+rpm -q --whatrequires <package>
+rpm -q --whatrequires <file>
+
 # To list all installed packages:
 rpm -qa
+
+# To find a pkg's dependencies
+rpm -i --test <package>
+
+# Display checksum against source
+rpm -K <package>
+
+# Verify a package
+rpm -V <package>

cheat/cheatsheets/rss2email

@@ -0,0 +1,21 @@
+'rss2email -- converts rss feeds and emails them to your inbox'
+
+# List all feeds 
+r2e list
+
+# Convert RSS entries to email
+r2e run
+
+# Add a new feed
+r2e add <feed address>
+
+# Add a new feed with new email address
+r2e add <feed address> [newemail address]
+
+# Delete a feed 
+r2e delete <# of feed in list/>
+
+# Help
+r2e -h
+
+

cheat/cheatsheets/ssh

@@ -28,3 +28,7 @@ ssh user@example.com -C -c blowfish -X
 
 # For more information, see:
 # http://unix.stackexchange.com/q/12755/44856
+
+# Copy files and folders through ssh from remote host to pwd with tar.gz compression
+# when there is no rsync command available
+ssh user@example.com "cd /var/www/Shared/; tar zcf - asset1 asset2" | tar zxf -

cheat/cheatsheets/systemd

@@ -0,0 +1,18 @@
+# Display process startup time
+systemd-analyze
+
+# Display process startup time at service level
+systemd-analyze blame
+
+# List running units
+systemctl list-units
+
+# Load a unit at startup
+systemctl enable foo.service
+
+# Start or Stop a unit
+systemctl <start | stop> foo.service
+
+# Unit file locations
+/etc/systemd/system
+/usr/lib/systemd/system

cheat/cheatsheets/tar

@@ -24,3 +24,8 @@ tar -jtvf /path/to/foo.tgz
 
 # To create a .gz archive and exclude all jpg,gif,... from the tgz
 tar czvf /path/to/foo.tgz --exclude=\*.{jpg,gif,png,wmv,flv,tar.gz,zip} /path/to/foo/
+
+# To use parallel (multi-threaded) implementation of compression algorithms:
+tar -z ... -> tar -Ipigz ...
+tar -j ... -> tar -Ipbzip2 ...
+tar -J ... -> tar -Ipixz ...

cheat/cheatsheets/tr

@@ -0,0 +1,22 @@
+#replace : with new line
+echo $PATH|tr ":" "\n" #equivalent with:
+echo $PATH|tr -t ":" \n 
+
+#remove all occurance of "ab"
+echo aabbcc |tr -d "ab"
+#ouput: cc
+
+#complement "aa"
+echo aabbccd |tr -c "aa" 1
+#output: aa11111 without new line
+#tip: Complement meaning keep aa,all others are replaced with 1
+
+#complement "ab\n"
+echo aabbccd |tr -c "ab\n" 1
+#output: aabb111 with new line
+
+#Preserve all alpha(-c). ":-[:digit:] etc" will be translated to "\n". sequeeze mode.
+echo $PATH|tr -cs "[:alpha:]" "\n" 
+
+#ordered list to unordered list
+echo "1. /usr/bin\n2. /bin" |tr -cs " /[:alpha:]\n" "+"

cheat/cheatsheets/unzip

@@ -0,0 +1,8 @@
+# Extract archive
+unzip archive.zip
+
+# Test integrity of archive
+unzip -tq archive.zip
+
+# List files and directories in a file
+unzip -l archive.zip

cheat/cheatsheets/vagrant

@@ -0,0 +1,33 @@
+# Initate Vagrant
+mkdir vag-vm; cd vag-vm
+vagrant init
+
+# Add a box to vagrant repo
+vagrant box add hashicorp/precise32
+
+# Add a box  Vagrant file
+config.vm.box = "hashicorp/precise32"
+
+# Add vm to public network as host
+config.vm.network "public_network"
+
+# Add provision script to vagrant file
+config.vm.provision :shell, path: "provision.sh"
+
+# Start vm 
+vagrant up
+
+# Connect to started instance
+vagrant ssh
+
+# Shutdown vm
+vagrant halt
+
+# Hibernate vm
+vagrant suspend
+
+# Set vm to initial state by cleaning all data
+vagrant destroy
+
+# Restart vm with new provision script
+vagran reload --provision

cheat/cheatsheets/weechat

@@ -0,0 +1,16 @@
+# Set unread marker on all windows
+Ctrl-s Ctrl-u
+
+# Switch buffer left
+Ctrl-p, Alt-left
+# Switch buffer right
+Ctrl-n, Alt-right
+# Next buffer with activity
+Alt-a
+# Switch buffers
+Alt-0...9
+
+# Scroll buffer title
+F9/F10
+# Scroll nick list
+F11/F12

cheat/cheatsheets/wget

@@ -2,7 +2,7 @@
 wget http://path.to.the/file
 
 # To download a file and change its name
-wget http://path.to.the/file -o newname
+wget http://path.to.the/file -O newname
 
 # To download a file into a directory
 wget -P path/to/directory http://path.to.the/file

cheat/cheatsheets/yum

@@ -22,6 +22,9 @@ yum info <package name>
 # List currently enabled repositories:
 yum repolist
 
+# List packages containing a certain keyword:
+yum list <package_name_or_word_to_search>
+ 
 # To download the source RPM for a package:
 yumdownloader --source <package name>
 

cheat/cheatsheets/zip

@@ -0,0 +1,5 @@
+# Create zip file
+zip archive.zip file1 directory/
+
+# To list, test and extract zip archives, see unzip
+cheat unzip

cheat/sheet.py

@@ -25,28 +25,16 @@ def create_or_edit(sheet):
     # if the cheatsheet does not exist
     if not exists(sheet):
         create(sheet)
-    
-    # if the cheatsheet exists and is writeable...
-    elif exists(sheet) and is_writable(sheet):
+
+    # if the cheatsheet exists but not in the default_path, copy it to the
+    # default path before editing
+    elif exists(sheet) and not exists_in_default_path(sheet):
+        copy(path(sheet), os.path.join(sheets.default_path(), sheet))
         edit(sheet)
 
-    # if the cheatsheet exists but is not writable...
-    elif exists(sheet) and not is_writable(sheet):
-        # ... ask the user if we should copy the cheatsheet to her home directory for editing
-        yes = prompt_yes_or_no(
-          'The ' + sheet + ' sheet is not editable. Do you want to copy it to '
-          'your user cheatsheets directory before editing? Keep in mind that '
-          'your sheet will always be used before system-wide one.'
-        )
-
-        # if yes, copy the cheatsheet to the home directory before editing
-        if yes:
-            copy(path(sheet), os.path.join(sheets.default_path(), sheet))
-            edit(sheet)
-
-        # if no, just abort
-        else:
-            die('Aborting.')
+    # if it exists and is in the default path, then just open it
+    else:
+        edit(sheet)
 
 
 def create(sheet):
@@ -75,6 +63,12 @@ def exists(sheet):
     return sheet in sheets.get() and os.access(path(sheet), os.R_OK)
 
 
+def exists_in_default_path(sheet):
+    """ Predicate that returns true if the sheet exists in default_path"""
+    default_path_sheet = os.path.join(sheets.default_path(), sheet)
+    return sheet in sheets.get() and os.access(default_path_sheet, os.R_OK)
+
+
 def is_writable(sheet):
     """ Predicate that returns true if the sheet is writeable """
     return sheet in sheets.get() and os.access(path(sheet), os.W_OK)

cheat/sheets.py

@@ -2,13 +2,6 @@ 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 """
 
@@ -37,11 +30,7 @@ def default_path():
 
 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
+    cheats = {}
 
     # otherwise, scan the filesystem
     for cheat_dir in reversed(paths()):

setup.py

@@ -3,7 +3,7 @@ import os
 
 setup(
     name         = 'cheat',
-    version      = '2.1.4',
+    version      = '2.1.19',
     author       = 'Chris Lane',
     author_email = 'chris@chris-allen-lane.com',
     license      = 'GPL3',