dotfiles/zsh/functions.zsh

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#!/usr/bin/env zsh
# Functions
# Generate TLS certs using a local CA
gencert () {
DOMAIN=$1
test -d /usr/local/opt/openssl@1.1/bin && PATH='/usr/local/opt/openssl@1.1/bin':$PATH
test -d /opt/homebrew/opt/openssl@1.1/bin && PATH='/opt/homebrew/opt/openssl@1.1/bin':$PATH
test -f /usr/local/etc/openssl@1.1/openssl.cnf && SSLCNF='/usr/local/etc/openssl@1.1/openssl.cnf'
test -f /opt/homebrew/etc/openssl@1.1/openssl.cnf && SSLCNF='/opt/homebrew/etc/openssl@1.1/openssl.cnf'
test -f /etc/ssl/openssl.cnf && SSLCNF='/etc/ssl/openssl.cnf'
cd $HOME/git/ca
[[ ! -d $DOMAIN ]] && mkdir $DOMAIN
cd $DOMAIN
[[ -f key ]] && mv key key.bak
[[ -f csr ]] && mv csr csr.bak
[[ -f crt ]] && mv crt crt.bak
openssl ecparam -name secp384r1 -genkey -noout -out key
chmod 644 key
openssl req -new -sha256 -key key -subj "/C=UK/ST=England/L=Bury/O=JMB Dev Ltd/CN=$DOMAIN" -reqexts SAN -config <(cat $SSLCNF <(printf "[SAN]\nsubjectAltName=DNS:$DOMAIN")) -out csr
openssl x509 -req -in csr -extfile <(cat $SSLCNF <(printf "[SAN]\nsubjectAltName=DNS:$DOMAIN")) -extensions SAN -CA ../jmb-ca-ecc.pem -CAkey ../jmb-ca-ecc.key -CAcreateserial -days 90 -sha256 -out crt
cd $HOME/git/ca
echo 'Certs generated for $DOMAIN'
}
# Generate a random 7 digit number, used for CCLs ImKeys
imkey () {
imkey=$(shuf -i 1111111-9999999 -n1)
echo $imkey
}
# Delete branches selected via fzf
delete-branches () {
git branch |
grep --invert-match '\*' | # Remove current branch
fzf --multi --preview="git log {..}" |
gxargs --no-run-if-empty git branch --delete
}
# Delete branches selected via fzf (force the deletion)
delete-branches-force () {
git branch |
grep --invert-match '\*' | # Remove current branch
fzf --multi --preview="git log {..}" |
gxargs --no-run-if-empty git branch --delete --force
}
# Open a PR
function pr-checkout() {
local pr_number
pr_number=$(
gh api 'repos/:owner/:repo/pulls' --jq '.[] | "#\(.number) \(.title)"' |
fzf |
sd '^\#(\d+)\s.*' '$1'
)
if [ -n "$pr_number" ]; then
gh pr checkout "$pr_number"
fi
}
# tail, but better
function watch-file() {
tail -f $1 | bat --paging=never -l log
}
# Get a temporary directory in a cross-platform manner
# See https://unix.stackexchange.com/a/685873
function get-temporary-directory() {
local temporary_directory=${XDG_RUNTIME_DIR:-${TMPDIR:-${TMP:-${TEMP:-/tmp}}}}
echo $temporary_directory
}
# Start an SSH SOCKS tunnel
function start-proxy() {
if [ -z "$SSH_PROXY_HOST" ]; then
echo "SSH_PROXY_HOST is not set or empty"
return
fi
local socket_dir=$(get-temporary-directory)
# Check if the last character of socket_dir is a directory separator character
if [[ $socket_dir[-1] == / ]]; then
# If yes, remove the directory separator character
socket_dir="${socket_dir%?}"
fi
echo "Opening proxy connection"
# Below we use -S and -M to help make closing the connection more reliable
# See this Stack Overflow answer for more info
# https://unix.stackexchange.com/a/525388
# -D 1337 opens up the SOXKS tunnel on localhost:1337
# -f Tells `ssh` to fork the ssh process in to the background
# -C Enables compression of data on the connections
# -q Uses quiet mode
# -N Do not execute a remote command on this connection
# -S Set the ControlPath for this connection
# -M Place the client into `master` mode
ssh -D 1337 -f -C -q -N -S $socket_dir/ssh-proxy-control -M $SSH_PROXY_HOST
}
# Stop an open proxy connection
function stop-proxy() {
if [ -z "$SSH_PROXY_HOST" ]; then
echo "SSH_PROXY_HOST is not set or empty"
return
fi
local socket_dir=$(get-temporary-directory)
# Check if the last character of socket_dir is a directory separator character
if [[ $socket_dir[-1] == / ]]; then
# If yes, remove the directory separator character
socket_dir="${socket_dir%?}"
fi
echo "Closing proxy connection"
# See the comments in `start-proxy()` for more info
ssh -S $socket_dir/ssh-proxy-control -O exit $SSH_PROXY_HOST
}
# Get the system appearance
function get-system-appearance() {
if ! type defaults &>/dev/null; then
echo ""
fi
local darkMode=true;
if [[ $(defaults read -g AppleInterfaceStyle 2> /dev/null) != 'Dark' ]]; then
darkMode=false
fi
if [[ $darkMode == true ]]; then
echo "dark"
else
echo "light"
fi
}