#!/bin/bash
set -euo pipefail

# Emit extra version string (if any) to append to BROGUE_VERSION_STRING

# Release builds should write nothing to stdout.  Development builds
# (everything else) should write something, but what depends on the information
# available.

# If we're in CI and the ref is the gha-build branch, assume we are a release
if [[ ${GITHUB_ACTIONS:-false} == true ]] && [[ $GITHUB_REF =~ ^refs/heads/gha-build ]]
then
    exit 0
fi

# Otherwise we must be a development build

if [[ ${GITHUB_ACTIONS:-false} == true ]]
then
    # If we're in CI, use what they hand us
    # If it's a branch, strip refs/heads.  Highlight tags by keeping the prefix
    EXTRA_VERSION="-dev.${GITHUB_SHA:0:7}.${GITHUB_REF##refs/heads/}"
elif { which git && git rev-parse --show-toplevel; } >/dev/null 2>&1
then
    # Otherwise inspect git if it and a repo are available
    EXTRA_VERSION="-dev.$(git log -1 --format='%h').$(git rev-parse --abbrev-ref HEAD)"
else
    # Finally, if nothing else just call it "development"
    EXTRA_VERSION=-dev
fi

# No matter what, limit the extra version to 64 characters
echo "${EXTRA_VERSION:0:64}"