Simpify handling of ansible-vault

I barely have any file valled "vault.ini" or "vault.yml" except of in
the ansible context. So, this treat all these files as ansible-vault
files. The other change affects the way we're looking for an ansible.cfg
file. 1st we check if it's present in the current working dir, if it's
missing there we check if one exists in the same directory as the
vault-file itself. If we do not find any files then we give up and do
not decrypt/encrypt the vault-file. Note, that this also means that we
need an ansible.cfg for the vault to be encrypted/decrypted, no other
method is implemented.

.config/nvim/lua/config/defaults.lua

@@ -141,6 +141,22 @@ vim.api.nvim_create_autocmd("FileType", {
 })
 
 if vim.fn.executable('ansible-vault') then
+	local function file_exists(name)
+		local f = io.open(name, "r")
+		if f ~= nil then io.close(f) return true else return false end
+	end
+	local function get_ansible_cfg()
+		if file_exists("ansible.cfg") then
+			return "ANSIBLE_CONFIG=./ansible.cfg"
+		else
+			local config_file = vim.fn.expand("%:p:h") .. "/ansible.cfg"
+			if file_exists(config_file) then
+				return "ANSIBLE_CONFIG=" .. config_file
+			else
+				return false
+			end
+		end
+	end
 	local ansiblevaultgroup = vim.api.nvim_create_augroup("ANSIBLE_VAULT", { clear = true })
 	local vault_id = "default"
 	local function register_ansible_vault_for_files_of_path_pattern(pattern)
@@ -159,20 +175,24 @@ if vim.fn.executable('ansible-vault') then
 			pattern = pattern,
 			group = ansiblevaultgroup,
 			callback = function ()
+				local config_env = get_ansible_cfg()
+				if config_env == false then return end
 				local header = vim.fn.split(vim.fn.getline(1), ";")
 				if vim.fn.len(header) > 3 then
 					vault_id = header[3]
 				else
 					vault_id = "default"
 				end
-				vim.cmd([[silent %!ansible-vault decrypt]])
+				vim.cmd("silent %!" .. config_env .. " ansible-vault decrypt")
 			end
 		})
 		vim.api.nvim_create_autocmd({ "BufWritePre", "FileWritePre" }, {
 			pattern = pattern,
 			group = ansiblevaultgroup,
 			callback = function ()
-				vim.cmd('silent %!ansible-vault encrypt --encrypt-vault-id="' .. vault_id .. '"')
+				local config_env = get_ansible_cfg()
+				if config_env == false then return end
+				vim.cmd('silent %!' .. config_env .. ' ansible-vault encrypt --encrypt-vault-id="' .. vault_id .. '"')
 			end
 		})
 		vim.api.nvim_create_autocmd({ "BufWritePost", "FileWritePost" }, {
@@ -183,8 +203,6 @@ if vim.fn.executable('ansible-vault') then
 			end
 		})
 	end
-	register_ansible_vault_for_files_of_path_pattern("*/ansible/**/vault.yml")
+	register_ansible_vault_for_files_of_path_pattern("**/vault.yml")
-	register_ansible_vault_for_files_of_path_pattern("*/group_vars/*/vault.yml")
+	register_ansible_vault_for_files_of_path_pattern("**/vault.ini")
-	register_ansible_vault_for_files_of_path_pattern("*/host_vars/*/vault.yml")
-	register_ansible_vault_for_files_of_path_pattern("*/vars/vault.yml")
 end