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iid=i-04XXXXXXXXXXXXX4f
# find security group of instance
securitygroups=`aws --profile dev ec2 describe-instances --region us-east-2 --instance-id $iid --query Reservations[*].Instances[*].SecurityGroups[*][GroupId] --output text`
# see open rules ( there's usually not many )
aws --profile dev --region us-east-2 ec2 describe-security-groups --group-ids $securitygroups --query '*[*][GroupId,IpPermissions[?FromPort!=null].[FromPort,ToPort,IpRanges[*].CidrIp]]' --output text
# find subnet 
subnet=`aws --profile dev ec2 describe-instances --region us-east-2 --instance-id $iid --query Reservations[*].Instances[*][SubnetId] --output text`
# now check default route.  If it's through an IGW, we should be good!
aws ec2 --region us-east-2 --profile dev describe-route-tables --filters Name=association.subnet-id,Values=$subnet --query RouteTables[*].Routes[?DestinationCidrBlock=='`0.0.0.0/0`']
# get it's public IP

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aws route53 list-hosted-zones  --query HostedZones[?Id!=null].Id --output text | grep -v None | xargs -n 1 aws route53 list-resource-record-sets --query  'ResourceRecordSets[?AliasTarget!=null][AliasTarget.DNSName]' --hosted-zone-id --output text | grep -F elb.amazonaws.com

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olddate=''
cmd='make r53'
while true; do newdate=`stat -f %m rotate-by-r53.py `; [[ "$olddate" == "$newdate" ]] || { olddate="$newdate"; $cmd; }; sleep 0.25; done

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# find directories containing .git subdirs
find ~/ -type d -name '.git' -print0 | xargs -n 1 -0 dirname \
| xargs -I % -n 1 bash -c 'cd "%" && pwd 1>&2; (git status --porcelain| grep -q . && [[ ! -n "`git diff`" ]] ) || echo %'\
| xargs -I % bash -c '[[ -n "`cd %; git status --porcelain; git diff;`" ]] && echo %' \
| tee /dev/stderr | sort > purportedly-empty-repos.txt

#That makes sure you don't have any uncommitted changes.  But it still doesn't check to make sure you don't have unpushed commits.

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# remove containers which have exited
docker ps -a | awk '/Exited[ ]\(/ {print $1}' | xargs docker rm

# remove images without  tag nor repo
docker images  | awk '/^<none>[[:space:]]*<none>/ {print $3}' | xargs docker rmi

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ip=...
#pubkey=... # default should suffice if you have the default key location
ssh $ip "bash -c 'mkdir -p ~/.ssh; chmod 0700 ~/.ssh; cat > ~/.ssh/authorized_keys'" < ${pubkey:-~/.ssh/id_rsa.pub

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aws route53 list-hosted-zones  --query HostedZones[?Id!=null].Id --output text \
| grep -v None \
| xargs -n 1 -P 10 \
  aws route53 list-resource-record-sets \
   --query  'ResourceRecordSets[?AliasTarget!=null][AliasTarget.DNSName]' \
   --output text --hosted-zone-id | grep -F elb.amazonaws.com

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Git commands for a slim deployment pipeline for github branches

get current branch

TODO: what happens if you're not on a branch?

git rev-parse --abbrev-ref HEAD

Get upstram of current branch

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python -c "import yaml, sys, json; print(json.dumps(yaml.safe_load(sys.stdin.read())))"

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#include <stdio.h>

void f() {
  printf("Hello, world") ;
}

int main() {
  f();
}