openpr.lua

-- Useful for opening the github PR of a commit in fugitive's blame and commit views
vim.api.nvim_create_user_command('FindGH', function(opts)
    local find_pr = true
    if opts.args and opts.args == "commit" then
      find_pr = false
    end

    local full_hash
    if vim.b.fugitive_type == 'commit' then
      local buffer = vim.api.nvim_get_current_buf()
      local filename = vim.api.nvim_buf_get_name(buffer)
      full_hash = vim.call('fugitive#Object', filename)
    else
      local short_hash = vim.fn.expand('<cword>')
      full_hash = vim.fn.system(string.format("git rev-parse %s", short_hash)):gsub("\n", "")
    end

    local shortest_unique = vim.fn.system(string.format("git rev-parse --short=7 %s", full_hash))
    -- Trim whitespace
    shortest_unique = shortest_unique:gsub("%s+", "")

    local cmd = string.format("git log --merges --oneline --grep=\"%s\" --reverse", shortest_unique)
    local output = vim.fn.system(cmd)

    -- Command to open URL in default browser (this command varies by OS)
    local open_cmd
    if vim.fn.has('mac') == 1 then
        open_cmd = 'open'
    elseif vim.fn.has('unix') == 1 then
        open_cmd = 'xdg-open'
    elseif vim.fn.has('win32') == 1 then
        open_cmd = 'start'
    end

    -- Get the GitHub repo URL
    local repo_url = vim.fn.system("git config --get remote.origin.url"):gsub("\n", "")
    repo_url = repo_url:gsub("%.git$", "")
    repo_url = repo_url:gsub("^git@github%.com:", "https://github.com/")

    local pr_number = output:match("#(%d+)")

    local target_url
    if pr_number and find_pr then
      -- Construct the full PR URL
      target_url = string.format("%s/pull/%s", repo_url, pr_number)
    else
      -- Couldn't find a PR number, let's open the git commit page
      target_url = string.format("%s/commit/%s", repo_url, full_hash)
    end

    if open_cmd then
        vim.fn.system(string.format("%s %s", open_cmd, target_url))
    else
        vim.api.nvim_echo({{"Couldn't determine command to open URL", 'ErrorMsg'}}, true, {})
    end
end, {
    nargs = '?',
})

vim.api.nvim_set_keymap('n', '<leader>gp', ':FindGH<CR>', {noremap = true, silent = true})
vim.api.nvim_set_keymap('n', '<leader>gP', ':FindGH commit<CR>', {noremap = true, silent = true})