check-syntax

#!/bin/bash
set -eu

# Checks the syntax of the conformance test files against an ISL grammar for the conformance DSL.

# This requires at least ion-cli@0.9.1 because a bugfix in ion-rust
readonly ion_cli_min_version="ion 0.9.1"

# Check the Ion CLI version so that we aren't erroneously passing because of an unfixed bug
readonly ion_cli_version=$(printf "%s\n%s" "$ion_cli_min_version" "$(ion -V)" | sort --version-sort | head -n 1)

if [[ "$ion_cli_version" != "$ion_cli_min_version" ]]; then
  echo "This script requires $ion_cli_min_version; found $ion_cli_version"
  exit 1
fi

readonly command=\
'ion schema -X validate -RE -f conformance/grammar.isl test_file conformance/**/*.ion'

# Macs come with older versions of bash which don't support globstar, so if we're on an older
# version of bash, we'll attempt to use zsh instead, but we don't use zsh by default because
# it doesn't come pre-installed on GitHub Actions runners
if [ -z "${BASH_VERSION}" ] || [ "${BASH_VERSION%%.*}" -lt 4 ]; then
  if which -s zsh; then
    printf "bash version requirements not met; using zsh\n\n"
    echo "$command" | zsh
  else
    echo "The check-syntax script requires either bash >=4.0.0 or zsh"
    exit 1
  fi
else
  shopt -s globstar
  eval "$command"
fi