'expandtab'-agnostic indentation

[kraftwerk28]

Is it possible to create a multiline snippet that would have an indentation based on et/ts/sw options in the buffer?
For example:

s(
  "ie=",
  fmt([[
    if err := {}; err != nil {{
    {}{}
    }}
  ]], { i(1), agnostic_indent_node(), i(0) })
)

[kraftwerk28]

The agnostic_indent_node should insert a single tab if noexpandtab is set, 2 spaces if expandtab, shiftwidth=2 etc.

[bew]

idea: In Ultisnips, a tab in the snippet would do exactly that (match the tab/space config of the buffer), maybe LuaSnip could copy this behavior?

[leiserfg]

The machinery is in place, maybe is just that the fmt helper is not using it.

[kraftwerk28]

idea: In Ultisnips, a tab in the snippet would do exactly that (match the tab/space config of the buffer), maybe LuaSnip could copy this behavior?

Hm, I just realized that LuaSnip also has this behavior, i.e. t("\t") matches et/sw/ts. Thank you.

[leiserfg]

Try:

    s(
      "ie=",
      fmt([[
        if err := {}; err != nil {{
        {}{}
        }}
      ]], { i(1), t"\t", i(0) })
    ),

[cskeeters]

Late Nov 2024, indent_string was added as an option to fmt. When provided, fmt will identify indentation in lines of format argument by finding instances of input_string at the start of the lines. This happens after leading space common to all lines are removed (see dedent). Using this method, fmt will replace the indentation found in the format string with indentation appropriate for the buffer. This method does not require node for indentation, which makes it more elegant IMHO.

s(
    "ie=",
    fmt([[
        if err := {}; err != nil {{
          {}
        }}
      ]],
      { i(1), i(0) },
      { indent_string = "  " }
    )
)