home: vim: configure 'null-ls' for 'sh'

home/vim/after/ftplugin/sh.vim

@@ -0,0 +1,17 @@
+" Create the `b:undo_ftplugin` variable if it doesn't exist
+call ftplugined#check_undo_ft()
+
+" Set-up LSP, linters, formatters
+lua << EOF
+local null_ls = require("null-ls")
+null_ls.register({
+    null_ls.builtins.diagnostics.shellcheck.with({
+        -- Require explicit empty string test
+        extra_args = { "-o", "avoid-nullary-conditions" },
+    }),
+    null_ls.builtins.formatting.shfmt.with({
+        -- Indent with 4 spaces, simplify the code, indent switch cases, use POSIX
+        extra_args = { "-i", "4", "-s", "-ci", "-ln", "posix" },
+    }),
+})
+EOF