Bash aliases for testing and applying patches based on the URL on your clipboard. If you're on OS X, grab the first three lines and add to your ~/.bash_profile. If you're on Linux, grab lines 5-8 and add to your ~/.bash_profile or ~/.bashrc or whatnot :)Testbot uses git to apply patches, I only include the `patch` version here because sometimes …

d8-patches.sh

# These ones are for OS X.
alias cav='curl `pbpaste` | git apply -v --check'
alias capv='curl `pbpaste` | patch -p1 --dry-run'

# These are untested but should work on many flavours of Linux. If they don't,
# please leave a comment!
alias cav='curl `xsel --clipboard --output` | git apply -v --check'
alias capv='curl `xsel --clipboard --output` | patch -p1 --dry-run'

# Patch shortcuts (some duplication of the above, but covers more use cases).
# 
# Replace `pbpaste` with `xsel --clipboard --output` for Linux!
#
# Copy a patch URL to the clipboard, then run one of these commands to download
# the patch and apply it. Hat tip to @chrisjlee for making me reconsider curl.
#
# Apply
alias cap='curl `pbpaste` | git apply -v'
# Apply and stage
alias cape='curl `pbpaste` | git apply -v --index'
# Apply with `patch`
alias capp='curl `pbpaste` | patch -p1'
# Reverse apply
alias carp='curl `pbpaste` | git apply -Rv'
# Reverse apply and stage
alias carpe='curl `pbpaste` | git apply -Rv --index'
# Verify patch
alias cav='curl `pbpaste` | git apply -v --check'
# Verify patch with `patch`
alias capv='curl `pbpaste` | patch -p1 --dry-run'

The Linux commands work on Ubuntu.