Automatically creates a new tag and AI generated description for it

gitaitag.sh

#!/bin/env bash

set -e

model="gpt-4o"
temperature=0.8

prompt="Below is the output of \`git log <latest_tag>..HEAD\`."`
    `"\nPlease provide a perfect tag message."`
    `"\nUse emojis in the message text when appropriate. Use past tense."`
    `"\nProvide a message ready for direct substitution "`
    `"(don't use \`\`\` and provide  multiline message)."

# the hash of the commit that was marked with the last tag
latest_tag_hash=$(git rev-list --tags --max-count=1)

# the name of the last tag, using its hash
latest_tag=$(git describe --tags --abbrev=0 $latest_tag_hash)

# Output the commit log from the previous tag to the HEAD (current state)
# use the found name of the previous tag to start the story
message=`git log $latest_tag..HEAD`

minor_ver="${latest_tag##*.}"
base_ver="${latest_tag%.*}"
((minor_ver+=1))
new_tag="${base_ver}.${minor_ver}"

echo "$latest_tag -> $new_tag"

if [ -z "$message" ]; then
    echo "Nothing to commit, working tree clean" >&2
    exit 1
fi

json_payload=$(jq -n \
    --arg model "$model" \
    --arg temperature "$temperature" \
    --arg prompt "$prompt" \
    --arg message "$message" \
    '{
        model: $model,
        temperature: ($temperature | tonumber),
        messages: [
          {
            role: "system",
            content: $prompt
          },
          {
            role: "user",
            content: $message
          }
        ]
    }')

response=$(curl -s https://api.openai.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $OPENAI_API_KEY" \
  -d "$json_payload")

# Checking if the "error" key is in the response
if echo "$response" | jq -e '.error' > /dev/null; then
    echo "Error: $(echo "$response" | jq -r '.error.message')" >&2
    exit 2
else
    # If there is no error, trying to extract the desired message
    content=$(echo "$response" | jq -e -r '.choices[0].message.content')
    
    # Checking if the message was extracted
    if ! [[ $? -eq 0 ]]; then
        # If the message could not be extracted, 
        # output the original text of the response to stderr
        echo "Failed to extract the message. Response was:" >&2
        echo "$response" >&2
        exit 3
    fi
fi

description_file=$(mktemp)
echo "$content" > "$description_file"
nano "$description_file"

git tag -a "$new_tag" -m "$content"

cat "$description_file"
rm "$description_file"