notify-slack

#!/bin/bash

set -e

test -n "$SLACK_WEBHOOK" || {
  echo "No SLACK_WEBHOOK defined, skipping." 1>&2
  exit 0
}

case "$STATUS" in
  success)   COLOR="#41aa58" ; VERB="Passed" ;;
  failure)   COLOR="#ff0000" ; VERB="Failed" ;;
  cancelled) COLOR="#ff5800" ; VERB="Cancelled" ;;
esac

GITHUB_REPO_URL="$GITHUB_SERVER_URL/$GITHUB_REPOSITORY"

if [ -n "$PR_NUMBER" ]; then
  TEXT=$( printf "%s _%s_ check <%s|#%s> for <%s|\`%s\`> (<%s|*\`%s\`*>) *by %s*" \
    "$VERB" \
    "$GITHUB_JOB" \
    "$GITHUB_REPO_URL/pull/$PR_NUMBER/checks?sha=$COMMIT_SHA" \
    "$GITHUB_RUN_NUMBER" \
    "$GITHUB_REPO_URL/commit/${COMMIT_SHA}" \
    "${COMMIT_SHA:0:8}" \
    "$GITHUB_REPO_URL/tree/$GITHUB_HEAD_REF" \
    "$GITHUB_HEAD_REF" \
    "$GITHUB_ACTOR"
  )
else
  TEXT=$( printf "%s _%s_ check <%s|#%s> for <%s|\`%s\`> *by %s*" \
    "$VERB" \
    "$GITHUB_JOB" \
    "$GITHUB_REPO_URL/actions" \
    "$GITHUB_RUN_NUMBER" \
    "$GITHUB_REPO_URL/commit/${GITHUB_SHA}" \
    "${GITHUB_SHA:0:8}" \
    "$GITHUB_ACTOR"
  )
fi

if [ -n "$TEST_RESULTS" ]; then
  TEXT="${TEXT}\n_Tests:_ ${TEST_RESULTS}"
fi
if [ -n "$COVERAGE_RESULTS" ]; then
  TEXT="${TEXT}\n_Coverage:_ ${COVERAGE_RESULTS}"
fi

# github actions doesn't expose current job's numeric id, so look it up
GITHUB_JOB_ID=$(
  curl -s \
    -u "$GITHUB_ACTOR:$TOKEN" \
    -H "Accept: application/vnd.github.v3+json" \
    "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/actions/runs/$GITHUB_RUN_ID/jobs" |
  # parsing json with simple unix tools is fun :/
  sed -nEe 's/^      "(id|name)": "?([^"]*)"?,/\2/p' | tr '\n' ' ' |
  sed -Ee 's/([0-9]+) ([^ ]+) ?/\1 \2\n/g' |
  awk -v GITHUB_JOB="$GITHUB_JOB" '{ if ($2 == GITHUB_JOB) print $1 }'
)
STARTED=$(
  curl -s \
    -u "$GITHUB_ACTOR:$TOKEN" \
    -H "Accept: application/vnd.github.v3+json" \
    "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/actions/jobs/$GITHUB_JOB_ID" |
  sed -nEe 's/^  "started_at": "(.*)",/\1/p'
)
ELAPSED=$(( `date +%s` - `date -d "$STARTED" +%s` ))
TEXT="${TEXT}\n_Elapsed:_ ${ELAPSED}s"

curl -f -d @- -H "Content-Type: application/json" "$SLACK_WEBHOOK" <<EOSLACKJSON
{
  "attachments": [{
    "text": "$TEXT",
    "color": "$COLOR",
    "footer": "<$GITHUB_REPO_URL|$GITHUB_REPOSITORY>"
  }]
}
EOSLACKJSON