[nongnu] elpa/rubocop 0b4e5ce 61/64: Add an option to execute rubocop in a chroot

[ELPA Syncer]

branch: elpa/rubocop
commit 0b4e5ce56304892d6d57dd0792803471dd8e1224
Author: Nacho Barrientos <nacho.barrientos@cern.ch>
Commit: Bozhidar Batsov <bozhidar.batsov@gmail.com>

    Add an option to execute rubocop in a chroot
---
 README.md  | 8 +++++++-
 rubocop.el | 6 ++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 2eaf0d9..623f934 100644
--- a/README.md
+++ b/README.md
@@ -87,7 +87,13 @@ You can change the shell command used by 
`rubocop-autocorrect-*` commands via `r
 
 You can change the shell command used by `rubocop-format-*` commands via 
`rubocop-format-command`.
 
-## Alternatives
+You can run rubocop inside a chroot via schroot by setting:
+
+``` emacs-lisp
+(setq rubocop-run-in-chroot t)
+```
+
+## alternatives
 
 [Flycheck](https://www.flycheck.org) and Flymake (Emacs built-in) provide more 
sophisticated integration with various lint tools, including RuboCop.
 
diff --git a/rubocop.el b/rubocop.el
index f8c56ec..932f5f4 100644
--- a/rubocop.el
+++ b/rubocop.el
@@ -85,6 +85,11 @@ It's basically auto-correction limited to layout cops."
   :group 'rubocop
   :type 'boolean)
 
+(defcustom rubocop-run-in-chroot nil
+  "Runs rubocop inside a chroot via schroot setting the cwd to the project's 
root."
+  :group 'rubocop
+  :type 'boolean)
+
 (defun rubocop-local-file-name (file-name)
   "Retrieve local filename if FILE-NAME is opened via TRAMP."
   (cond ((tramp-tramp-file-p file-name)
@@ -128,6 +133,7 @@ When NO-ERROR is non-nil returns nil instead of raise an 
error."
   "Build the full command to be run based on COMMAND and PATH.
 The command will be prefixed with `bundle exec` if RuboCop is bundled."
   (concat
+   (if rubocop-run-in-chroot (format "schroot -d %s -- " 
(rubocop-project-root)))
    (if (and (not rubocop-prefer-system-executable) (rubocop-bundled-p)) 
"bundle exec " "")
    command
    (rubocop-build-requires)