runtime(dist): centralize safe executable check and add vim library (#13413)
Follow up to 816fbcc26 (patch 9.0.1833: [security] runtime file fixes,
2023-08-31) and f7ac0ef50 (runtime: don't execute external commands when
loading ftplugins, 2023-09-06).
This puts the logic for safe executable checks in a single place, by introducing
a central vim library, so all filetypes benefit from consistency.
Notable changes:
- dist#vim because the (autoload) namespace for a new runtime support
library. Supporting functions should get documentation. It might make
life easier for NeoVim devs to make the documentation a new file
rather than cram it into existing files, though we may want
cross-references to it somewhere…
- The gzip and zip plugins need to be opted into by enabling execution
of those programs (or the global plugin_exec). This needs
documentation or discussion.
- This fixes a bug in the zig plugin: code setting s:tmp_cwd was removed
in f7ac0ef50 (runtime: don't execute external commands when loading
ftplugins, 2023-09-06), but the variable was still referenced. Since
the new function takes care of that automatically, the variable is no
longer needed.
Signed-off-by: D. Ben Knoble <ben.knoble+github@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/ftplugin/awk.vim b/runtime/ftplugin/awk.vim
index 785088f..40fe304 100644
--- a/runtime/ftplugin/awk.vim
+++ b/runtime/ftplugin/awk.vim
@@ -37,8 +37,8 @@
let b:undo_ftplugin .= " | setl fp<"
endif
- " Disabled by default for security reasons.
- if get(g:, 'awk_exec', get(g:, 'plugin_exec', 0))
+ " Disabled by default for security reasons.
+ if dist#vim#IsSafeExecutable('awk', 'gawk')
let path = system("gawk 'BEGIN { printf ENVIRON[\"AWKPATH\"] }'")
let path = substitute(path, '^\.\=:\|:\.\=$\|:\.\=:', ',,', 'g') " POSIX cwd
let path = substitute(path, ':', ',', 'g')