ChristopherA

Boot into single-user mode (hold ⌘-S during startup)
Once the command-line prompt appears, type the following:

mount -uw /
rm -R /Library/Preferences/
rm -R /Users/your username/
cd /var/db/dslocal/nodes/Default

ls to list the files

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Bash Shell Trivalities: Short Useful Commands & Recipes for the OSX Shell

I find returning to terminal after a break from programming that the simple things sometimes are lost. This document's goal is to capture these, even if otherwise trivial.

Count visible files in folder

$ /bin/ls . | wc -l

Count all files, visible and hidden in folder

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==== SSH keygen for github

https://help.github.com/articles/generating-ssh-keys#platform-mac

http://software.clapper.org/cheat-sheets/mac-os-x.html https://github.com/hjuutilainen/dotfiles/blob/master/bin/osx-user-defaults.sh

gib: fast access to .gitignore boilerplates https://github.com/simonwhitaker/gibo

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    <meta content="width=device-width, initial-scale=1.0 maximum-scale=1.0 user-scalable=0" name="viewport" />
    <meta content="apple-mobile-web-app-capable" content="yes" />

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Keybase proof

I hereby claim:

• I am ChristopherA on github.
• I am christophera (https://keybase.io/christophera) on keybase.
• I have a public key whose fingerprint is FDFE 14A5 4ECB 30FC 5D22 74EF F8D3 6C91 3574 05ED

To claim this, I am signing this object:

ChristopherA

How to extract a single file with its history from a git repository

These steps show two less common interactions with git to extract a single file which is inside a subfolder from a git repository. These steps essentially reduce the repository to just the desired files and should performed on a copy of the original repository (1.).

First the repository is reduced to just the subfolder containing the files in question using git filter-branch --subdirectory-filter (2.) which is a useful step by itself if just a subfolder needs to be extracted. This step moves the desired files to the top level of the repository.

Finally all remaining files are listed using git ls, the files to keep are removed from that using grep -v and the resulting list is passed to git rm which is invoked by git filter-branch --index-filter (3.). A bit convoluted but it does the trick.

1. copy the repository to extract the file from and go to the desired branch

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#!/bin/bash

# ~/.dotfiles/.brewfile_local.sh -- loaded by ~/.bashrc for private data,
# an example for my github.com/christophera/dotfiles project
#
# ~/.bash_profile.local is sourced by ~/.bashrc for shell code which will be
# .gitignored and thus not be backed up into the .dotfiles repository.

# Load on a new machine via:

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shell files

at end of .bashrc

source $HOME/.bashrc_$(hostname -f)

alias completion

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file=$(mktemp); curl -s "$url" > $file; $EDITOR $file; sh $file; rm $file

curl $URL | ( cat > $HOME/tmp/source; read REPLY; [[ ! $REPLY =~ ^[Yy]$ ]] && cat $HOME/tmp/source ) | sh ; rm $HOME/tmp/source

#need some cross platform way to hashpipe check.

if [[ `uname` == 'Darwin' ]]; then
  alias sha256sum='openssl dgst -sha256'
fi

ChristopherA

Saving iMovie Projects to Network Volumes

The problem

Apple's iMovie saves its Projects and Events files as folders named "/Documents/Movies/iMovie\ Events", "/Documents/Movies/iMovie\ Projects". You are not able to change this location using the app, however, you can use iMovie to move these folders to an external drive. On that drive, both of these folders MUST be at the root, i.e. "/Volumes/Footage/iMovie\ Events" and "/Volumes/Footage/iMovie\ Projects". If you open iMovie while an external drive has these folders at root, iMovie will automatically add them to its event and project library.

Unfortunately, you can't do this trick with network volumes by default. You can do some tricks with symlinks but when using them across volumes they are unreliable and iMovie will loose track of information.

The solution