#!/usr/bin/env bash
#
# Run "cargo sort" to check that the Cargo.tomls are sorted

set -euo pipefail

# We want to exclude the toplevel Cargo.toml, because that needs to be in
# topological order.  But cargo sort doesn't support that.
#  https://github.com/DevinR528/cargo-sort/issues/38

#  for Arti we have 2 Cargo.toml files that should not follow lexical ordering and need topological ordering
#  ../Cargo.toml - toplevel topological sort improves compilation times
#  ../crates/arti/Cargo.toml - the main project crate, also needs topological sort
#  this means this script will encounter errors twice
#  toplevel - will return error about unsorted dependencies in cwd (hence cwd() trickery because forks and branches will have non-arti names in CI)
#  the arti crate - this will result the unsorted deps in arti errors
#  those two errors are counted towards omission in this script

# So instead, we sed its output.  Urgh.

(TERM=dumb cargo sort --check --workspace || test $? = 1) 2>&1 | perl -ne '

    use Cwd;              # Load the Cwd module to get the current working directory
    use File::Basename;   # Load the File::Basename module to extract the top folder name

    # Get the current working directory
    my $current_dir = cwd();

    # Extract the top folder name from the full path
    my $cargo_sort_root = basename($current_dir);

    next if m{^\Qerror: Dependencies for $cargo_sort_root are not sorted\E$};
    next if m{^\Qerror: Cargo.toml for $cargo_sort_root is not formatted\E$};
    next if m{^\Qerror: Dependencies for arti are not sorted\E$};
    $n_allowed += !!m{^\QChecking arti...} || !!m{^\QChecking $cargo_sort_root...}; # for arti crate or toplevel dir
    next if m{^Checking \S+\Q...\E$};
    $n_bad++;
    print STDERR;
    END {
        flush STDOUT;
        eval {
            die "expected 2 unordered crates, got $n_allowed instead \n" unless $n_allowed==2;
            die "unexpected output ($n_bad line(s)) from cargo-sort\n" if $n_bad;
        };
        if ($@) {
            print STDERR $@;
            exit 12;
        }
    }
'