package main

import (
    "fmt"
    "os"
)

func main() {
    s := "world"

    if len(os.Args) > 1 {
        s = os.Args[1]
    }

    fmt.Printf("Hello, %v!", s)
    fmt.Println("")

    if s == "fail" {
        os.Exit(30)
    }
}

module example.com/test

go 1.18

go build

./test
Hello, world!

#!/usr/bin/env bash

archs=(amd64 arm64)
os=(darwin freebsd linux openbsd windows)
name="hello"

for arch in ${archs[@]}; do
  for os in ${os[@]}; do
        env GOOS=${os} GOARCH=${arch} go build -o ${name}_${os}-${arch}
  done
done

tar cf - /etc/ |ssh ${remote-host} "cd /tmp/ && cat > $(hostname)-etc.tar"

tar czf - /etc/ |ssh ${remote-host} "cd /tmp/ && cat > $(hostname)-etc.tar.gz"

s="google.com"; timeout 2 openssl s_client -servername ${s} -connect ${s}:443 -showcerts > /tmp/${s}.chain

cd /etc/ssl; openssl req -nodes -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 356

git config --global init.defaultBranch main

[ -f /etc/resolv.conf -a -f /etc/hosts ] && echo "Both files exist" || echo "One or Both Files are missing"

sed -E -i.bak 's/(.*\/var.*)(,nosuid)(.*)/\1\3/' /etc/fstab

defaults write com.apple.finder AppleShowAllFiles -boolean true; killall Finder

root@puffy# df -h
Filesystem     Size    Used   Avail Capacity  Mounted on
/dev/sd0a      3.9G    766M    2.9G    20%    /
/dev/sd0d      1.9G   20.0K    1.8G     0%    /tmp
/dev/sd0e      5.8G   36.1M    7.3G     0%    /var
/dev/sd0f      7.8G    3.6G    3.8G    49%    /usr
/dev/sd0g      2.xG    150M    7.2G     2%    /home

which results in this:

a 4G  /
a 2G  swap
a 2G  /tmp
a 6G  /var
a 8G  /usr
a *   /home

root@puffy# df -h
Filesystem     Size    Used   Avail Capacity  Mounted on
/dev/sd0a      3.9G    766M    2.9G    20%    /
/dev/sd0d      1.9G   20.0K    1.8G     0%    /tmp
/dev/sd0e      7.8G   36.1M    7.3G     0%    /var
/dev/sd0f      7.8G    3.6G    3.8G    49%    /usr
/dev/sd0g      7.7G    150M    7.2G     2%    /home

which results in this:

a 4G  /
a 2G  swap
a 2G  /tmp
a 8G  /var
a 8G  /usr
a *   /home

# python3 --version
Python 3.9.12

# python3 -m pip --version
pip 22.0.4 from /usr/local/lib/python3.9/site-packages/pip (python 3.9)

python3 -m pip list

python3 -m pip list --outdated --format columns

test -d .vscode || mkdir .vscode
test -f .vscode/settings.json && mv .vscode/settings.json .vscode/settings.json-$(date +%s)
cat << 'EOF' > .vscode/settings.json
{
    "[python]": {
        "editor.defaultFormatter": "charliermarsh.ruff",
        "editor.formatOnSave": true,
        "editor.codeActionsOnSave": {
            "source.organizeImports": "explicit",
            "source.fixAll": true
        },
    },
}
EOF

[tool.ruff]
# Disable rule F401 for unused imports
ignore = ["F401"]

test -d .vscode || mkdir .vscode
test -f .vscode/launch.json && mv .vscode/launch.json .vscode/launch.json-$(date +%s)
cat << 'EOF' > .vscode/launch.json
{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        // default config to debug your current active file with python
        {
            "name": "Python: Current File",
            "type": "python",
            "request": "launch",
            "program": "${file}",
            "console": "integratedTerminal",
            "justMyCode": true
        },
        {
            "name": "Python: Test001",
            "type": "python",
            "request": "launch",
            "program": "${workspaceFolder}/project/code.py",
            "args": [
                "arg1",
                "arg2",
                "arg3"
            ],
            "console": "integratedTerminal"
        },
        {
            "name": "Python: FastAPI",
            "type": "python",
            "request": "launch",
            "module": "uvicorn",
            "args": [
                "app.main:app",
                "--reload"
            ]
        },
        {
            "name": "Python: Flask",
            "type": "python",
            "request": "launch",
            "module": "flask",
            "args": [
                "run",
                "--reload"
            ]
        }
    ]
}
EOF

test -f .gitignore && mv .gitignore .gitignore-$(date +%s)
cat << EOF > .gitignore
# added $(date), https://blog.stoege.net/posts/vscode/

# Files
.DS_Store
backup.*
secret
secrets

# Folders
**/.DS_Store/*
**/.history/*
**/.terraform/*
**/.venv/*
**/__pycache__/*
**/cache/*
EOF

poetry add --group dev black pylint py-pytest

command + k, command + u

command + k, command + u

command + k, command + 0

command + k, command + j

code --list-extensions |xargs -L 1 echo code --install-extension |sed "s/$/ --force/"

poetry add email-validator

#!/usr/bin/env python3

from email_validator import validate_email, EmailNotValidError

ok=[]
nok=[]

emails = [
        "my+address@mydomain.tld", "hans@dampf.ch", "gott@welt.net",
        "adsf@asdf.com", "asf.asdf", "franz!mueller@abc.com", "asdf@asdf.adf"
        ]

print ("\nMy Little Mail Validator\n")

for email in emails:

    try:
        # Validate.
        valid = validate_email(email)

        # Update with the n
        email = valid.email

        # Append to List
        ok.append(email)

    except EmailNotValidError as e:

        # email is not valid, exception message is human-readable
        nok.append(str(e))


print ("*** Mail ok ***")
for item in ok:
    print("ok: ", item)

print ("\n*** Mail NOT ok ***")
for item in nok:
    print("NOK:", item,"!")

print()

doas pkg_add nginx-lua--

doas pkg_info -L nginx-lua--
Information for inst:nginx-lua-1.20.1p0

Files:
/var/www/modules/ndk_http_module.so
/var/www/modules/ngx_http_lua_module.so

load_module "modules/ndk_http_module.so";
load_module "modules/ngx_http_lua_module.so";

log_format log_req_resp   '$remote_addr - $remote_user [$time_local] '
                          '"$request" $status $body_bytes_sent '
                          '"$http_referer" "$http_user_agent" '
                          '$request_time req_header:"$req_header" '
                          'resp_header:"$resp_header"';

conn puffy
   authby      = secret
   ike         = aes256-sha256-modp2048
   keyexchange = ikev1
   ikelifetime = 1h
   keyingtries = 0
   left        = %defaultroute
   right       = 193.xx.xx.xx
   leftid      = 212.xx.xx.xx
   rightid     = 193.xx.xx.xx
   lifetime    = 1200s
   leftsubnet  = 10.11.1.8/30
   rightsubnet = 10.1.6.0/24
   esp         = aes256-sha256-modp2048
   dpddelay    = 30
   dpdtimeout  = 120
   dpdaction   = restart
   auto        = start

net.inet.ip.forwarding=1
net.inet.gre.allow=1

for i in $(cat /etc/sysctl.conf); do sysctl $i;done

# Tunnel to Debian

local_gw    = "193.xx.xx.xx"
local_net   = "10.1.6.0/24"
remote_gw   = "212.xx.xx.xx"
remote_net  = "10.11.1.8/30"
key         = "DAS-SAG-ICH-DIR-NICHT-:)"

ike dynamic esp tunnel from $local_net to $remote_net peer $remote_gw \
main    auth $auth1   enc $enc1   group $group1   lifetime $time1 \
quick   auth $auth2   enc $enc2   group $group2   lifetime $time2 \
srcid $local_gw \
psk $key

ike dynamic esp tunnel from $remote_net to $local_net peer $local_gw \
main    auth $auth1   enc $enc1   group $group1   lifetime $time1 \
quick   auth $auth2   enc $enc2   group $group2   lifetime $time2 \
srcid $remote_gw \
psk $key

rcctl enable ipsec isakmpd
rcctl set isakmpd flags -K
rcctl restart ipsec isakmpd

cat /etc/hostname.enc0
up

# Allow UDP Port 500 and 4500
pass in  on (egress) proto udp from 193.xx.xx.xx to 212.xx.xx.xx port {isakmp, ipsec-nat-t}
pass out on (egress) proto udp from 212.xx.xx.xx to 193.xx.xx.xx {isakmp, ipsec-nat-t}

# Allow ESP encapsulated IPsec traffic on the external interface
pass in  on (egress) proto esp from 193.xx.xx.xx to 212.xx.xx.xx
pass out on (egress) proto esp from 212.xx.xx.xx to 139.xx.xx.xx

# Allow IP in IP Traffic
pass in  on enc0 proto ipencap from 193.xx.xx.xx to 212.xx.xx.xx keep state (if-bound)
pass out on enc0 proto ipencap from 212.xx.xx.xx to 193.xx.xx.xx keep state (if-bound)