#!/bin/bash

set -e

: "${TEST_SRCDIR:?}"

TOP_SRCDIR=`cd "${TEST_SRCDIR}/.." && pwd`
README="${TOP_SRCDIR}/README.md"
MAN_DIR="${TOP_SRCDIR}/man"

fail()
{
  echo "tst-doc-version-policy: $*" >&2
  exit 1
}

# README is a current-interface document, not a release changelog.  Keep
# package release numbers in NEWS/ChangeLog and obtain the installed version
# from the tools themselves.
if grep -E 'LibMCPU [0-9]+\.[0-9]+\.[0-9]+|libmcpu-[0-9]+\.[0-9]+\.[0-9]+' \
        "${README}" >/dev/null ; then
  fail "README.md contains a release-bound LibMCPU version string"
fi

# Manual pages describe the interface contract.  Their .TH source field is
# deliberately version-independent so a release bump cannot leave stale
# numbers behind.
while IFS= read -r page ; do
  header=`sed -n '1p' "${page}"`
  case "${header}" in
    *'"LibMCPU"'*)
      ;;
    *)
      fail "${page}: .TH source field is not version-independent"
      ;;
  esac

done < <(find "${MAN_DIR}" -type f \( -name '*.1' -o -name '*.7' \) | sort)

if grep -ER 'LibMCPU [0-9]+\.[0-9]+\.[0-9]+' "${MAN_DIR}" >/dev/null ; then
  fail "manual page contains a release-bound LibMCPU version string"
fi

exit 0