1 files changed, 63 insertions, 0 deletions
diff --git a/lua/conform/errors.lua b/lua/conform/errors.lua
new file mode 100644
index 0000000..3a56b80
--- /dev/null
+++ b/lua/conform/errors.lua
@@ -0,0 +1,63 @@
+local M = {}
+
+---@class conform.Error
+---@field code conform.ERROR_CODE
+---@field message string
+---@field debounce_message? boolean
+
+---@enum conform.ERROR_CODE
+M.ERROR_CODE = {
+  -- Command was passed invalid arguments
+  INVALID_ARGS = 1,
+  -- Command was not executable
+  NOT_EXECUTABLE = 2,
+  -- Command timed out during execution
+  TIMEOUT = 3,
+  -- Command was pre-empted by another call to format
+  INTERRUPTED = 4,
+  -- Command produced an error during execution
+  RUNTIME = 5,
+  -- Asynchronous formatter results were discarded due to a concurrent modification
+  CONCURRENT_MODIFICATION = 6,
+}
+
+---@param code conform.ERROR_CODE
+---@return integer
+M.level_for_code = function(code)
+  if code == M.ERROR_CODE.CONCURRENT_MODIFICATION then
+    return vim.log.levels.INFO
+  elseif code == M.ERROR_CODE.TIMEOUT or code == M.ERROR_CODE.INTERRUPTED then
+    return vim.log.levels.WARN
+  else
+    return vim.log.levels.ERROR
+  end
+end
+
+---Returns true if the error occurred while attempting to run the formatter
+---@param code conform.ERROR_CODE
+---@return boolean
+M.is_execution_error = function(code)
+  return code == M.ERROR_CODE.RUNTIME
+    or code == M.ERROR_CODE.NOT_EXECUTABLE
+    or code == M.ERROR_CODE.INVALID_ARGS
+end
+
+---@param err1? conform.Error
+---@param err2? conform.Error
+---@return nil|conform.Error
+M.coalesce = function(err1, err2)
+  if not err1 then
+    return err2
+  elseif not err2 then
+    return err1
+  end
+  local level1 = M.level_for_code(err1.code)
+  local level2 = M.level_for_code(err2.code)
+  if level2 > level1 then
+    return err2
+  else
+    return err1
+  end
+end
+
+return M