Update git-commit-ai and add new scripts

- update DWM config
- add tiktoken-cli for token counting
- introduce a shell script for generating AI-assisted commit messages

home/common/optional/desktop/dwm/default.nix

@@ -25,6 +25,7 @@
     ./scripts/clipboard-save.nix
     ./scripts/clipboard-recall.nix
     ./scripts/get-focused-monitor.nix
+    ./scripts/git-commit-ai.nix
   ];
 
   home.packages = [

home/common/optional/desktop/dwm/scripts/git-commit-ai.nix

@@ -0,0 +1,123 @@
+{ pkgs, ... }:
+{
+  home.packages = [
+    (pkgs.writers.writePython3Bin
+      "tiktoken-cli"
+      { libraries = [ pkgs.python3Packages.tiktoken ]; }
+      ''
+        import os
+        import sys
+        import tiktoken
+      
+        content = sys.stdin.read()
+      
+        default = "gpt-3.5-turbo-0301"
+        model = os.getenv('TIKTOKEN_MODEL', default)
+      
+        try:
+            encoding = tiktoken.encoding_for_model(model)
+        except KeyError:
+            encoding = tiktoken.get_encoding(default)
+      
+        print(len(encoding.encode(content)))
+      '')
+
+    (pkgs.writeShellScriptBin "git-commit-ai" ''
+      # This bash script performs the following tasks:
+      # 1. Takes a git diff of modifications made to a repo.
+      # 2. Passes this diff to an LLM (Large Language Model) that generates a commit
+      # message.
+      #
+      # Usage: ./git-commit-ai --git-diff-commands --model
+      #
+      #
+      endpoint="10.0.10.100:11434"
+      
+      diff=$(git diff "$@" )
+      [ -z "$diff" ] && echo "No diff provided. Did you stage the changes?" && exit 1
+      tokens=$(echo "$diff" | tiktoken-cli)
+      echo -e "\n\nEstimated tokens: $tokens\n\n"
+      choose_model() {
+          models_response=$(curl http://$endpoint/api/tags)
+          model=$(echo "$models_response" | jq -r '..|.model? // empty' | fzf | sed 's/:latest$//')
+      }
+      choose_model
+      
+      system_message="""
+      You are a git commit generator. You will be provided with a git diff file.
+      Your role is to create a concise commit message that outlines all of the
+      most relevant and impactful changes in the diff. You only output a commit
+      message, do not write anything else not related to the commit. Use
+      imperative mood for you writing style.
+      
+      Your message should include a short summary in the first line followed by
+      more detailed descriptions of the changes on subsequent lines.
+      
+      The first line summary should be no more than 70 characters, not end with a
+      period, and a blank line should separate the summary from the body of the
+      message.
+      
+      There should only be 1 summary line, and 1 body with the description.
+      The body should include no more than 3 bullet points with more detailed
+      descriptions of the files and functions that have been modified.
+      
+      Do not output any code.
+      """
+      
+      query=$(jq -n --arg model "$model" --arg system_message "$system_message" --arg prompt "$diff" '{model: $model, system: $system_message, prompt: $prompt, stream: false}')
+       echo "$query"
+      
+      git config commit.template ".git/gitmessage"
+      
+      redo=""
+      while true
+      do
+        
+        [ -z "$redo" ] && echo "Using model: $model" && commit_message=$(curl -s http://$endpoint/api/generate -H "Content-Type: application/json" -d "$query" | jq -r '.response')
+      
+        echo ""
+        echo "Message:"
+        echo "---------------------------------------------"
+        echo ""
+        echo "$commit_message"
+        echo ""
+        echo "---------------------------------------------"
+        echo "What would you like to do?"
+        echo ""
+        echo "Copy to clipboard (c)"
+        echo "Git commit in editor (g)"
+        echo "Open in editor (e)"
+        echo "Show diff (d)"
+        echo "Choose different model (m)"
+        echo "Exit and do nothing (q)"
+        
+        read -r -p "Action: (c|g|e|q) " input
+        
+        case "$input" in
+          "c") echo "$commit_message" | ${pkgs.xclip}/bin/xclip -i -selection CLIPBOARD && 
+               ${pkgs.libnotify}/bin/notify-send "AI Buddy" "Copied to clipboard"
+               exit 0
+          ;;
+          "g") echo "$commit_message" > ".git/gitmessage" &&
+               git commit -e
+               cat /dev/null > ".git/gitmessage" # clear the template
+               exit 0
+          ;;
+        "d") echo -e "Current commit message:\n\n$commit_message\n\nDiff file:\n\n$diff" | less
+               redo=true
+               shift
+          ;;
+          "e") echo "$commit_message" | nvim -
+               exit 0
+          ;;
+          "m") choose_model && shift
+          ;;
+          "q") exit 0
+          ;;
+            *) exit 0
+        esac
+      done  
+      
+    '')
+  ];
+}