feat(shfmt): add automatic indentation detection (#481)

* feat(shfmt): automatically detect indentation

* fix(markdown-toc): improve correctness of indentation size calculation

* fix(djlint): improve correctness of indentation size calculation

* feat: add effective `shiftwidth` to `conform.Context`

this also refactors formatters that automatically set indentation level
to use the new shiftwidth context

1 files changed, 2 insertions, 2 deletions

diff --git a/lua/conform/formatters/markdown-toc.lua b/lua/conform/formatters/markdown-toc.lua
index a7a9694..5e1d80a 100644
--- a/lua/conform/formatters/markdown-toc.lua
+++ b/lua/conform/formatters/markdown-toc.lua
@@ -6,10 +6,10 @@ return {
   },
   command = "markdown-toc",
   stdin = false,
-  args = function(self, ctx)
+  args = function(_, ctx)
     -- use the indentation set in the current buffer, effectively allowing us to
     -- use values from .editorconfig
-    local indent = vim.bo[ctx.buf].expandtab and (" "):rep(vim.bo[ctx.buf].tabstop) or "\t"
+    local indent = vim.bo[ctx.buf].expandtab and (" "):rep(ctx.shiftwidth) or "\t"
     return { "--indent=" .. indent, "-i", "$FILENAME" }
   end,
 }