templrfmt

Formatter for the templr templates library.

Install

cargo install templrfmt

Usage

Usage: templrfmt [OPTIONS] [INPUT_PATTERNS]...

Arguments:
  [INPUT_PATTERNS]...  A space separated list of file, directory or glob

Options:
  -s, --stdin    Format stdin and write to stdout
  -r, --rustfmt  Format with rustfmt
  -q, --quiet
  -h, --help     Print help
  -V, --version  Print version

Using with Rust Analyzer

You can set the rust-analyzer.rustfmt.overrideCommand setting.

  "rust-analyzer.rustfmt.overrideCommand": ["templrfmt", "--stdin", "--rustfmt"]

Pretty-printer algorithm

The pretty-printer is based on Philip Karlton’s Mesa pretty-printer, as described in the appendix to Derek C. Oppen, “Pretty Printing” (1979), Stanford Computer Science Department STAN-CS-79-770. This algorithm's implementation is taken from prettyplease which is adapted from rustc_ast_pretty.

The algorithm takes from an input stream of length n and an output device with margin width m, the algorithm requires time O(n) and space O(m). The algorithm is described in terms of two parallel processes; the first scans the input stream to determine the space required to print logical blocks of tokens; the second uses this information to decide where to break lines of text; the two processes communicate by means of a buffer of size o(m). The algorithm does not wait for the entire stream to be input, but begins printing as soon as it has received a linefull of input.