add more files & a readme

AutoLaunch.scpt

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+property startup_script : "~/.config/bin/work.init.sh"
+
+tell application "iTerm2"
+  set W to create window with default profile 
+
+  set S to current session of W
+  tell S
+    write text startup_script
+  end tell
+end tell

README.md

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+# Dotfiles
+
+Hello, welcome to my dotfiles repository.
+
+I have grown to believe that dotfiles is among the most unfiltered
+expressions of a person. Here are mine. This repository obviously
+helps me sync configuration across different machines, but I do
+also hope that it comes in handy to another stranger. To that end,
+I shall maintain an Index *(edit: **attempt to**)* of the dotfiles
+in this repository and where that might fit on your own machine.
+
++----------------------------------------------------------------------------------------------------+
+|    #     |             File                                |              Notes                    |
++----------------------------------------------------------------------------------------------------+
+|    1     |  [work.init.sh](./work.init.sh)                 | `~/.config/bin/work.init.sh`          |
+|          |                                                 | tmux-initialization script for        |
+|          |                                                 | my work needs.                        |
++----------------------------------------------------------------------------------------------------+
+|    2     |  [AutoLaunch.scpt](./AutoLaunch.scpt)           | `~/Library/Application Support/iTerm2/|
+|          |                                                 |Scripts/AutoLaunch.scpt`               |
+|          |                                                 | applescript to auto-run the above tmux|
+|          |                                                 | init script when I launch `iTerm2`.   |
+|----------------------------------------------------------------------------------------------------|
+|    3     |  [sync-internal-dns.sh](./sync-internal-dns.sh) | `~/.config/bin/sync-internal-dns.sh`  |
+|          |                                                 | I already use Tailscale + Syncthing,  |
+|          |                                                 | but for streaming I absolutely need   |
+|          |                                                 | a connection over my private network  |
+|          |                                                 | (vs Tailscale's VPN). I've put this in|
+|          |                                                 | my `crontab` to run every minute on   |
+|          |                                                 | all my devices. It adds a             |
+|          |                                                 | `$hostname.internal` entry to         |
+|          |                                                 | `/etc/hosts` for each machine.        |
+|----------------------------------------------------------------------------------------------------|

sync-internal-dns.sh

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+#!/bin/bash
+
+set -ex
+
+self="$(hostname -s)"
+internal_hosts_file="/Users/kaustubh/Sync/internal.hosts"
+etc_hosts_file="/etc/hosts"
+
+self_domain="$self.internal"
+echo "self hostname: '$self'"$'\t'"advertising as: '$self_domain'"
+
+function get_self_ip {
+    for w in $(/sbin/ifconfig | grep 192.168); do
+        if [[ "$w" =~ ^192\.168\..* ]]; then
+            echo "$w"
+            break
+        fi
+    done
+}
+
+self_ip="$(get_self_ip)"
+if [ "$self_ip" = "" ]; then
+    echo "oops! couldn't find private IP"
+    exit 1
+fi
+
+function readHosts {
+    # returns:
+    # ip,host
+    # ip,host
+    # ...
+    IFS=$'\n'
+    while read line; do
+        unset IFS
+
+        line=$(echo "$line" | sed -e 's/#.*$//' | sed 's/^\s*$//')
+        if [ "$line" = "" ]; then
+            continue
+        fi
+
+        read ip host <<< $line
+        echo $ip $host
+    done
+}
+
+internal_hosts="$(cat $internal_hosts_file | readHosts)"
+etc_hosts="$(cat $etc_hosts_file | readHosts)"
+
+echo "INTERNAL:"
+echo "$internal_hosts"
+echo "ETC:"
+echo "$etc_hosts"
+
+has_self="0"
+IFS=$'\n'
+for ih in $internal_hosts; do
+    unset IFS
+
+    read wanted_ip wanted_host <<< $ih
+    echo "wanted_ip: $wanted_ip, wanted_host: $wanted_host"
+
+    if [ "$self_domain" = "$wanted_host" ]; then
+        if [ "$self_ip" != "$wanted_ip" ]; then
+            sed -i bak "s/^$wanted_ip.*$//" $internal_hosts_file
+        else
+            has_self="1"
+        fi
+        break
+    fi
+done
+if [ "$has_self" != "1" ]; then
+    echo "$self_ip"$'\t'"$self_domain" >> $internal_hosts_file
+fi
+
+IFS=$'\n'; for ih in $internal_hosts; do
+    unset IFS
+
+    read wanted_ip wanted_host <<< $ih
+
+    if [ "$wanted_host" = "$self_domain" ]; then
+        continue
+    fi
+
+    fixed="0"
+    IFS=$'\n'; for eh in $etc_hosts; do
+        unset IFS
+        read etc_ip etc_host <<< $eh
+        if [ "$etc_host" = "$wanted_host" ]; then
+            sed -i .bak -r "s/$etc_ip[[:space:]]+$etc_host/$wanted_ip\t$wanted_host/" $etc_hosts_file
+            fixed="1"
+        fi
+    done
+
+    if [ "$fixed" != "1" ]; then
+        echo "$wanted_ip"$'\t'"$wanted_host" >> $etc_hosts_file
+    fi
+done