fix: catch jobstart errors (#183)

2 files changed, 16 insertions, 5 deletions

diff --git a/lua/conform/errors.lua b/lua/conform/errors.lua
index 3a56b80..43e9a7b 100644
--- a/lua/conform/errors.lua
+++ b/lua/conform/errors.lua
@@ -11,14 +11,16 @@ M.ERROR_CODE = {
   INVALID_ARGS = 1,
   -- Command was not executable
   NOT_EXECUTABLE = 2,
+  -- Error occurred during when calling jobstart
+  JOBSTART = 3,
   -- Command timed out during execution
-  TIMEOUT = 3,
+  TIMEOUT = 4,
   -- Command was pre-empted by another call to format
-  INTERRUPTED = 4,
+  INTERRUPTED = 5,
   -- Command produced an error during execution
-  RUNTIME = 5,
+  RUNTIME = 6,
   -- Asynchronous formatter results were discarded due to a concurrent modification
-  CONCURRENT_MODIFICATION = 6,
+  CONCURRENT_MODIFICATION = 7,
 }
 
 ---@param code conform.ERROR_CODE
@@ -40,6 +42,7 @@ 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
+    or code == M.ERROR_CODE.JOBSTART
 end
 
 ---@param err1? conform.Error
diff --git a/lua/conform/runner.lua b/lua/conform/runner.lua
index 4146163..4b166a9 100644
--- a/lua/conform/runner.lua
+++ b/lua/conform/runner.lua
@@ -299,7 +299,7 @@ local function run_formatter(bufnr, formatter, config, ctx, input_lines, opts, c
   local stderr
   local exit_codes = config.exit_codes or { 0 }
   local jid
-  jid = vim.fn.jobstart(cmd, {
+  local ok, jid_or_err = pcall(vim.fn.jobstart, cmd, {
     cwd = cwd,
     env = env,
     stdout_buffered = true,
@@ -364,6 +364,14 @@ local function run_formatter(bufnr, formatter, config, ctx, input_lines, opts, c
       end
     end,
   })
+  if not ok then
+    callback({
+      code = errors.ERROR_CODE.JOBSTART,
+      message = string.format("Formatter '%s' error in jobstart: %s", formatter.name, jid_or_err),
+    })
+    return
+  end
+  jid = jid_or_err
   if jid == 0 then
     callback({
       code = errors.ERROR_CODE.INVALID_ARGS,