dotfiles/bin/gitea-pr

#!/bin/bash
set -euo pipefail

GITEA_SSH_HOST="gitbox.bradina.localdomain"
GITEA_API="https://gitbox.branderson.io/api/v1"

function usage() {
    echo "Usage: gitea-pr create [--title TITLE] [--body BODY] [--base BRANCH]"
    echo "       gitea-pr comments PR_NUMBER"
    echo "       gitea-pr merge PR_NUMBER"
}

function require_token() {
    if [ -z "${GITEA_TOKEN:-}" ]; then
        echo "GITEA_TOKEN is not set. Generate a token in the Gitea web UI" \
             "(Settings > Applications, scopes write:repository + write:issue)" \
             "and add 'export GITEA_TOKEN=...' to ~/.profile.local" >&2
        exit 1
    fi
}

function gitea_owner_repo() {
    local remote_url host owner_repo
    remote_url=$(git remote get-url origin 2>/dev/null) || {
        echo "No 'origin' remote found in this repository" >&2
        exit 1
    }
    host=$(echo "$remote_url" | sed -E 's#^[^@]+@([^:]+):.*#\1#')
    if [ "$host" != "$GITEA_SSH_HOST" ]; then
        echo "origin remote ($remote_url) is not on $GITEA_SSH_HOST; gitea-pr only supports this host" >&2
        exit 1
    fi
    owner_repo=$(echo "$remote_url" | sed -E 's#^[^@]+@[^:]+:##; s#\.git$##')
    echo "$owner_repo"
}

if [ "$#" -lt 1 ]; then
    usage
    exit 1
fi

subcommand="$1"
shift

case "$subcommand" in
    create|comments|merge)
        require_token
        owner_repo=$(gitea_owner_repo)
        owner="${owner_repo%%/*}"
        repo="${owner_repo##*/}"
        ;;
    *)
        usage
        exit 1
        ;;
esac

case "$subcommand" in
    create)
        title=""
        body=""
        base=""
        while [ "$#" -gt 0 ]; do
            case "$1" in
                --title) title="$2"; shift 2 ;;
                --body) body="$2"; shift 2 ;;
                --base) base="$2"; shift 2 ;;
                *) echo "Unknown option: $1" >&2; usage; exit 1 ;;
            esac
        done

        current_branch=$(git rev-parse --abbrev-ref HEAD)
        if [ "$current_branch" = "HEAD" ]; then
            echo "Detached HEAD: check out the feature branch before creating a PR" >&2
            exit 1
        fi
        if [ -z "$base" ]; then
            base=$(git symbolic-ref refs/remotes/origin/HEAD 2>/dev/null | sed 's#refs/remotes/origin/##' || true)
            base="${base:-main}"
        fi
        if [ -z "$title" ]; then
            title="$current_branch"
        fi

        response=$(curl -sS -w '\n%{http_code}' -X POST "${GITEA_API}/repos/${owner}/${repo}/pulls" \
            -H "Authorization: token ${GITEA_TOKEN}" \
            -H "Content-Type: application/json" \
            -d "$(jq -n --arg head "$current_branch" --arg base "$base" --arg title "$title" --arg body "$body" \
                '{head: $head, base: $base, title: $title, body: $body}')")
        http_code=$(echo "$response" | tail -1)
        json=$(echo "$response" | sed '$d')

        if [ "$http_code" -lt 200 ] || [ "$http_code" -ge 300 ]; then
            echo "Failed to create PR (HTTP $http_code):" >&2
            echo "$json" >&2
            exit 1
        fi
        echo "$json" | jq -r '.html_url'
        ;;
    comments)
        pr_number="${1:-}"
        if [ -z "$pr_number" ]; then
            echo "Usage: gitea-pr comments PR_NUMBER" >&2
            exit 1
        fi

        echo "=== Issue comments ==="
        response=$(curl -sS -w '\n%{http_code}' "${GITEA_API}/repos/${owner}/${repo}/issues/${pr_number}/comments" \
            -H "Authorization: token ${GITEA_TOKEN}")
        http_code=$(echo "$response" | tail -1)
        json=$(echo "$response" | sed '$d')
        if [ "$http_code" -lt 200 ] || [ "$http_code" -ge 300 ]; then
            echo "Failed to fetch issue comments (HTTP $http_code):" >&2
            echo "$json" >&2
            exit 1
        fi
        echo "$json" | jq -r '.[] | "[\(.user.login) @ \(.created_at)]\n\(.body)\n"'

        echo "=== Reviews ==="
        response=$(curl -sS -w '\n%{http_code}' "${GITEA_API}/repos/${owner}/${repo}/pulls/${pr_number}/reviews" \
            -H "Authorization: token ${GITEA_TOKEN}")
        http_code=$(echo "$response" | tail -1)
        json=$(echo "$response" | sed '$d')
        if [ "$http_code" -lt 200 ] || [ "$http_code" -ge 300 ]; then
            echo "Failed to fetch reviews (HTTP $http_code):" >&2
            echo "$json" >&2
            exit 1
        fi
        echo "$json" | jq -r '.[] | select(.body != "") | "[\(.user.login) @ \(.submitted_at) — \(.state)]\n\(.body)\n"'
        ;;
    merge)
        pr_number="${1:-}"
        if [ -z "$pr_number" ]; then
            echo "Usage: gitea-pr merge PR_NUMBER" >&2
            exit 1
        fi

        response=$(curl -sS -w '\n%{http_code}' -X POST "${GITEA_API}/repos/${owner}/${repo}/pulls/${pr_number}/merge" \
            -H "Authorization: token ${GITEA_TOKEN}" \
            -H "Content-Type: application/json" \
            -d '{"Do": "merge"}')
        http_code=$(echo "$response" | tail -1)
        json=$(echo "$response" | sed '$d')

        if [ "$http_code" -lt 200 ] || [ "$http_code" -ge 300 ]; then
            echo "Failed to merge PR #${pr_number} (HTTP $http_code):" >&2
            echo "$json" >&2
            exit 1
        fi
        echo "Merged PR #${pr_number}"
        ;;
esac