notify-on-job-start

#!/usr/bin/env bash
set -euo pipefail

: "${SLACK_TOKEN:?The SLACK_TOKEN environment variable is required.}"
: "${SLACK_CHANNELS:?The SLACK_CHANNELS environment variable is required.}"

: "${AWS_BATCH_JOB_ID:=}"
: "${GITHUB_RUN_ID:=}"

bin="$(dirname "$0")"
job_name="${1:?A job name is required as the first argument}"
github_repo="${2:?A GitHub repository with owner and repository name is required as the second argument}"
build_dir="${3:-ingest}"

echo "Notifying Slack about started ${job_name} job."
message="${job_name} job has started."

if [[ -n "${GITHUB_RUN_ID}" ]]; then
  message+=" The job was submitted by GitHub Action <https://github.com/${github_repo}/actions/runs/${GITHUB_RUN_ID}?check_suite_focus=true|${GITHUB_RUN_ID}>."
fi

if [[ -n "${AWS_BATCH_JOB_ID}" ]]; then
  message+=" The job was launched as AWS Batch job \`${AWS_BATCH_JOB_ID}\` (<https://console.aws.amazon.com/batch/v2/home?region=us-east-1#jobs/detail/${AWS_BATCH_JOB_ID}|link>)."
  message+=" Follow along in your local clone of ${github_repo} with: "'```'"nextstrain build --aws-batch --no-download --attach ${AWS_BATCH_JOB_ID} ${build_dir}"'```'
fi

"$bin"/notify-slack "$message"