fix: add error handling when calling executable (#4)

Author: mikesmithgh

lua/git-prompt-string-lualine/init.lua

@@ -45,15 +45,24 @@ M.git_prompt_string_json = function()
     table.insert(cmd, '--color-disabled')
   end
   local stdout = ''
+  local job_id
   -- replace with vim.system if/when we no longer support neovim v9
-  local job_id = vim.fn.jobstart(cmd, {
+  local status, result = pcall(vim.fn.jobstart, cmd, {
     cwd = opts.cwd,
     stdout_buffered = true,
     stderr_buffered = true,
     on_stdout = function(_, data)
       stdout = table.concat(data, '')
     end,
   })
+
+  if status then
+    job_id = result
+  else
+    vim.notify_once('git-prompt-string-lualine.nvim: ERROR ' .. result, vim.log.levels.ERROR, {})
+    return { error = result, color = 'error' }
+  end
+
   vim.fn.jobwait({ job_id })
   local json = vim.json.decode(stdout == '' and '{}' or stdout)
   return {

lua/lualine/components/git_prompt_string.lua

@@ -45,6 +45,7 @@ function M:init(options)
       untracked = self:create_hl(self.options.prompt_config.color_untracked, 'untracked'),
       no_upstream = self:create_hl(self.options.prompt_config.color_no_upstream, 'no_upstream'),
       merging = self:create_hl(self.options.prompt_config.color_merging, 'merging'),
+      error = self:create_hl('ErrorMsg', 'error'),
     }
   end
 
@@ -63,10 +64,14 @@ function M:update_status()
     self.options.icon_color_highlight = self.highlights[prompt.color]
     self.options.color_highlight = self.highlights[prompt.color]
   end
-  if self.options.trim_prompt_prefix then
+  if self.options.trim_prompt_prefix and prompt.prompt_prefix then
     prompt.prompt_prefix = prompt.prompt_prefix:gsub('^%s+', '')
   end
-  return prompt.prompt_prefix .. prompt.branch_info .. prompt.branch_status .. prompt.prompt_suffix
+  return (prompt.error or '')
+    .. (prompt.prompt_prefix or '')
+    .. (prompt.branch_info or '')
+    .. (prompt.branch_status or '')
+    .. (prompt.prompt_suffix or '')
 end
 
 return M