From 2d1d6fb85011e07a6b5b29f57247254cbc4b8815 Mon Sep 17 00:00:00 2001
From: w0rp <devw0rp@gmail.com>
Date: Tue, 21 Mar 2017 13:09:02 +0000
Subject: [PATCH] Add some utility functions for changing directories for
 commands

---
 autoload/ale/util.vim                   | 13 +++++++++++++
 test/util/test_cd_string_commands.vader |  9 +++++++++
 2 files changed, 22 insertions(+)
 create mode 100644 test/util/test_cd_string_commands.vader

diff --git a/autoload/ale/util.vim b/autoload/ale/util.vim
index 600717db..84ffe22e 100644
--- a/autoload/ale/util.vim
+++ b/autoload/ale/util.vim
@@ -144,3 +144,16 @@ endfunction
 function! ale#util#ClockMilliseconds() abort
     return float2nr(reltimefloat(reltime()) * 1000)
 endfunction
+
+
+" Output 'cd <directory> && '
+" This function can be used changing the directory for a linter command.
+function! ale#util#CdString(directory) abort
+    return 'cd ' . fnameescape(a:directory) . ' && '
+endfunction
+
+" Output 'cd <buffer_filename_directory> && '
+" This function can be used changing the directory for a linter command.
+function! ale#util#BufferCdString(buffer) abort
+    return ale#util#CdString(fnamemodify(bufname(a:buffer), ':p:h'))
+endfunction
diff --git a/test/util/test_cd_string_commands.vader b/test/util/test_cd_string_commands.vader
new file mode 100644
index 00000000..0fdc0e30
--- /dev/null
+++ b/test/util/test_cd_string_commands.vader
@@ -0,0 +1,9 @@
+Before:
+  silent! cd /testplugin/test/util
+
+Execute(CdString should output the correct command string):
+  AssertEqual 'cd /foo\ bar/baz && ', ale#util#CdString('/foo bar/baz')
+
+Execute(BufferCdString should output the correct command string):
+  Assert match(ale#util#BufferCdString(bufnr('')), '^cd .*test/util && $') >= 0,
+  \ 'String didn''t match regex: ' . ale#util#BufferCdString(bufnr(''))