feat: add support for for vsg (#451)

* feat: add support for vsg

* support more config files, use ctx.dirname

1 files changed, 52 insertions, 0 deletions

diff --git a/lua/conform/formatters/vsg.lua b/lua/conform/formatters/vsg.lua
new file mode 100644
index 0000000..ca0059e
--- /dev/null
+++ b/lua/conform/formatters/vsg.lua
@@ -0,0 +1,52 @@
+local config_files = {
+  "vsg_config.yaml",
+  "vsg_config.yml",
+  "vsg_config.json",
+  "vsg.yaml",
+  "vsg.yml",
+  "vsg.json",
+  ".vsg_config.yaml",
+  ".vsg_config.yml",
+  ".vsg_config.json",
+  ".vsg.yaml",
+  ".vsg.yml",
+  ".vsg.json",
+}
+
+local function find_config(dirname)
+  local paths = {
+    dirname,
+    (os.getenv("XDG_CONFIG_HOME") or os.getenv("HOME") .. "/.config") .. "/vsg",
+  }
+
+  for _, path in ipairs(paths) do
+    local config = vim.fs.find(config_files, {
+      path = path,
+      upward = path == dirname,
+    })[1]
+    if config then
+      return config
+    end
+  end
+end
+
+---@type conform.FileFormatterConfig
+return {
+  meta = {
+    url = "https://github.com/jeremiah-c-leary/vhdl-style-guide",
+    description = "Style guide enforcement for VHDL.",
+  },
+  command = "vsg",
+  stdin = false,
+  args = function(_, ctx)
+    local args = { "-of", "syntastic", "--fix", "-f", "$FILENAME" }
+    local config_file = find_config(ctx.dirname)
+
+    if config_file then
+      table.insert(args, "-c")
+      table.insert(args, config_file)
+    end
+
+    return args
+  end,
+}