Merge pull request #547 from blueyed/improve-error-on-init

Improve error messages during init

autoload/jedi.vim

@@ -126,12 +126,11 @@ function! jedi#init_python()
         try
             let s:_init_python = s:init_python()
         catch
-            if !exists("g:jedi#squelch_py_warning")
-                echohl WarningMsg
-                echom "Error: jedi-vim failed to initialize Python: ".v:exception." (in ".v:throwpoint.")"
-                echohl None
-            endif
             let s:_init_python = 0
+            if !exists("g:jedi#squelch_py_warning")
+                echoerr "Error: jedi-vim failed to initialize Python: "
+                            \ .v:exception." (in ".v:throwpoint.")"
+            endif
         endtry
     endif
     return s:_init_python
@@ -154,11 +153,11 @@ function! jedi#setup_py_version(py_version)
 
     try
         execute cmd_init.' '.s:script_path.'/initialize.py'
-        execute 'command! -nargs=1 PythonJedi '.cmd_exec.' <args>'
-        return 1
     catch
         throw "jedi#setup_py_version: ".v:exception
     endtry
+    execute 'command! -nargs=1 PythonJedi '.cmd_exec.' <args>'
+    return 1
 endfunction
 
 
@@ -202,12 +201,7 @@ function! jedi#_vim_exceptions(str, is_eval)
     return l:result
 endfunction
 
-
-if !jedi#init_python()
-    " Do not define any functions when Python initialization failed.
-    finish
-endif
-
+call jedi#init_python()  " Might throw an error.
 
 " ------------------------------------------------------------------------
 " functions that call python code

initialize.py

@@ -18,5 +18,10 @@ import traceback
 
 # update the sys path to include the jedi_vim script
 sys.path.insert(0, vim.eval('expand(s:script_path)'))
-import jedi_vim
-sys.path.pop(1)
+try:
+    import jedi_vim
+except Exception as excinfo:
+    raise Exception('Failed to import jedi_vim: {0}\n{1}'.format(
+        excinfo, traceback.format_exc()))
+finally:
+    sys.path.pop(1)

jedi_vim.py

@@ -78,12 +78,11 @@ def vim_eval(string):
 
 
 def no_jedi_warning(error=None):
-    msg = "Please install Jedi if you want to use jedi-vim."
+    vim.command('echohl WarningMsg')
+    vim.command('echom "Please install Jedi if you want to use jedi-vim."')
     if error:
-        msg = '{0} The error was: {1}'.format(msg, error)
-    vim.command('echohl WarningMsg'
-                '| echom "Please install Jedi if you want to use jedi-vim."'
-                '| echohl None')
+        vim.command('echom "The error was: {0}"'.format(error))
+    vim.command('echohl None')
 
 
 def echo_highlight(msg):