Follow the house shell conventions
Constants UPPER_SNAKE, mutable locals PascalCase, braced expansions throughout, per Development/Coding conventions in the vault.
This commit is contained in:
fisher
+69
-69
@@ -64,27 +64,27 @@ while [[ $# -gt 0 ]]; do
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esac
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done
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[[ -n "$REPO" ]] || die "--repo is required"
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[[ -n "$REF" ]] || die "--ref is required"
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[[ -n "$SHA" ]] || die "--sha is required"
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[[ -n "${REPO}" ]] || die "--repo is required"
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[[ -n "${REF}" ]] || die "--ref is required"
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[[ -n "${SHA}" ]] || die "--sha is required"
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if [[ "$EVENT" != "push" ]]; then
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if [[ "${EVENT}" != "push" ]]; then
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log "ignoring event '${EVENT}' for ${REPO} (only 'push' deploys)"
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exit 0
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fi
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if [[ "$REF" != refs/heads/* ]]; then
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if [[ "${REF}" != refs/heads/* ]]; then
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log "ignoring non-branch ref '${REF}' for ${REPO} (tags and deletes never deploy)"
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exit 0
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fi
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BRANCH="${REF#refs/heads/}"
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if [[ ! "$SHA" =~ ^[0-9a-f]{40}$ ]]; then
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if [[ ! "${SHA}" =~ ^[0-9a-f]{40}$ ]]; then
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die "--sha must be a full 40-character hex commit, got: ${SHA}"
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fi
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# The all-zero SHA is how git spells "this ref was deleted".
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if [[ "$SHA" == "0000000000000000000000000000000000000000" ]]; then
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if [[ "${SHA}" == "0000000000000000000000000000000000000000" ]]; then
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log "ignoring branch deletion of ${REPO}@${BRANCH}"
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exit 0
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fi
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@@ -92,43 +92,43 @@ fi
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# ------------------------------------------------------ target resolution ---
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set +e
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resolved="$("$CD_TARGET" resolve --repo "$REPO" --branch "$BRANCH")"
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resolve_rc=$?
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Resolved="$("${CD_TARGET}" resolve --repo "${REPO}" --branch "${BRANCH}")"
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ResolveRc=$?
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set -e
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if [[ $resolve_rc -eq $NO_MATCH ]]; then
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if [[ ${ResolveRc} -eq ${NO_MATCH} ]]; then
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log "no target on $(hostname) for ${REPO}@${BRANCH} -- nothing to do here"
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exit 0
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elif [[ $resolve_rc -ne 0 ]]; then
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die "target lookup failed for ${REPO}@${BRANCH} (exit ${resolve_rc})"
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elif [[ ${ResolveRc} -ne 0 ]]; then
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die "target lookup failed for ${REPO}@${BRANCH} (exit ${ResolveRc})"
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fi
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eval "$resolved"
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eval "${Resolved}"
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mkdir -p "$STATE_DIR"
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mkdir -p "${STATE_DIR}"
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readonly LOG_FILE="${STATE_DIR}/${CD_NAME}.log"
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readonly STATUS_FILE="${STATE_DIR}/${CD_NAME}.status"
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exec > >(stdbuf -oL tee -a "$LOG_FILE") 2>&1
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exec > >(stdbuf -oL tee -a "${LOG_FILE}") 2>&1
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log "=============================================================="
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log "target ${CD_NAME} (${CD_ENV} on ${CD_RESOLVED_HOST})"
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log "repo ${REPO}@${BRANCH}"
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log "commit ${SHA}"
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log "stack ${CD_STACK_DIR}/${CD_COMPOSE_FILE} [project ${CD_COMPOSE_PROJECT}]"
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[[ $DRY_RUN -eq 1 ]] && log "mode DRY RUN -- nothing will be changed"
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[[ ${DRY_RUN} -eq 1 ]] && log "mode DRY RUN -- nothing will be changed"
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[[ -d "$CD_STACK_DIR" ]] || die "stack directory missing: ${CD_STACK_DIR}"
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[[ -d "${CD_STACK_DIR}" ]] || die "stack directory missing: ${CD_STACK_DIR}"
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[[ -f "${CD_STACK_DIR}/${CD_COMPOSE_FILE}" ]] \
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|| die "compose file missing: ${CD_STACK_DIR}/${CD_COMPOSE_FILE}"
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# ----------------------------------------------------------------- notify ---
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notify() {
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local status="$1" message="$2" icon topic
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case "$status" in
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ok) icon="✅" ;;
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fail) icon="❌" ;;
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*) icon="ℹ️" ;;
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local Status="$1" Message="$2" Icon Topic
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case "${Status}" in
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ok) Icon="✅" ;;
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fail) Icon="❌" ;;
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*) Icon="ℹ️" ;;
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esac
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# Every terminal outcome notifies, so this is also where the machine-readable
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@@ -136,14 +136,14 @@ notify() {
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# grepping the log's prose, which quietly reported "no completed deploy"
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# for a healthy target whenever a log line was reworded.
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printf '%s\t%s\t%s\t%s\n' \
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"$(date -u '+%Y-%m-%dT%H:%M:%SZ')" "$status" "${SHA:0:12}" "$message" \
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> "$STATUS_FILE"
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"$(date -u '+%Y-%m-%dT%H:%M:%SZ')" "${Status}" "${SHA:0:12}" "${Message}" \
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> "${STATUS_FILE}"
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topic="${REPO//\//-}"
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Topic="${REPO//\//-}"
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curl -fsS --max-time 10 \
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-H "Title: ${CD_NAME} deploy" \
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-d "${icon} ${CD_NAME} (${CD_ENV}): ${message}" \
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"${CD_NTFY_BASE_URL}/${topic}" >/dev/null 2>&1 \
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-d "${Icon} ${CD_NAME} (${CD_ENV}): ${Message}" \
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"${CD_NTFY_BASE_URL}/${Topic}" >/dev/null 2>&1 \
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|| warn "ntfy notification failed (the deploy itself is unaffected)"
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}
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@@ -151,9 +151,9 @@ notify() {
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# Serialise per target, not per host: a test deploy must not block a prod one.
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readonly LOCK_FILE="${STATE_DIR}/${CD_NAME}.lock"
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exec 9>"$LOCK_FILE"
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exec 9>"${LOCK_FILE}"
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log "waiting for deploy lock (${CD_LOCK_WAIT_SECONDS}s max)"
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if ! flock -w "$CD_LOCK_WAIT_SECONDS" 9; then
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if ! flock -w "${CD_LOCK_WAIT_SECONDS}" 9; then
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notify fail "timed out waiting for the deploy lock after ${CD_LOCK_WAIT_SECONDS}s"
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die "timed out waiting for deploy lock after ${CD_LOCK_WAIT_SECONDS}s"
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fi
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@@ -161,13 +161,13 @@ log "lock acquired"
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# -------------------------------------------------------------- image tag ---
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tag="$CD_IMAGE_TAG_TEMPLATE"
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tag="${tag//\{branch\}/$BRANCH}"
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tag="${tag//\{env\}/$CD_ENV}"
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tag="${tag//\{sha\}/$SHA}"
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tag="${tag//\{short7\}/${SHA:0:7}}"
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tag="${tag//\{short12\}/${SHA:0:12}}"
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readonly CANDIDATE="${CD_IMAGE_REPO}:${tag}"
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Tag="${CD_IMAGE_TAG_TEMPLATE}"
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Tag="${Tag//\{branch\}/$BRANCH}"
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Tag="${Tag//\{env\}/$CD_ENV}"
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Tag="${Tag//\{sha\}/$SHA}"
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Tag="${Tag//\{short7\}/${SHA:0:7}}"
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Tag="${Tag//\{short12\}/${SHA:0:12}}"
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readonly CANDIDATE="${CD_IMAGE_REPO}:${Tag}"
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log "candidate ${CANDIDATE}"
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@@ -177,23 +177,23 @@ log "candidate ${CANDIDATE}"
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# has finished building. Poll rather than fail: the running container keeps
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# serving throughout.
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wait_for_image() {
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local elapsed=0
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local Elapsed=0
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while true; do
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if docker pull "$CANDIDATE" >/dev/null 2>&1; then
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log "image available after ${elapsed}s"
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if docker pull "${CANDIDATE}" >/dev/null 2>&1; then
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log "image available after ${Elapsed}s"
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return 0
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fi
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if (( elapsed >= CD_IMAGE_WAIT_SECONDS )); then
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if (( Elapsed >= CD_IMAGE_WAIT_SECONDS )); then
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return 1
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fi
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log "image not published yet, retrying in ${CD_IMAGE_POLL_INTERVAL}s (${elapsed}s elapsed)"
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sleep "$CD_IMAGE_POLL_INTERVAL"
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elapsed=$(( elapsed + CD_IMAGE_POLL_INTERVAL ))
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log "image not published yet, retrying in ${CD_IMAGE_POLL_INTERVAL}s (${Elapsed}s elapsed)"
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sleep "${CD_IMAGE_POLL_INTERVAL}"
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Elapsed=$(( Elapsed + CD_IMAGE_POLL_INTERVAL ))
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done
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}
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log "waiting for CI to publish the image (up to ${CD_IMAGE_WAIT_SECONDS}s)"
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if [[ $DRY_RUN -eq 1 ]]; then
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if [[ ${DRY_RUN} -eq 1 ]]; then
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log "dry run: skipping image wait"
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elif ! wait_for_image; then
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notify fail "image ${CANDIDATE} never appeared (waited ${CD_IMAGE_WAIT_SECONDS}s) -- did CI fail?"
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@@ -207,27 +207,27 @@ image_digest_ref() {
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| grep "^${CD_IMAGE_REPO}@" | head -n1
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}
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if [[ $DRY_RUN -eq 1 ]]; then
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DEPLOY_IMAGE="$CANDIDATE"
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if [[ ${DRY_RUN} -eq 1 ]]; then
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DEPLOY_IMAGE="${CANDIDATE}"
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log "dry run: would deploy ${DEPLOY_IMAGE}"
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else
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revision="$(docker image inspect \
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Revision="$(docker image inspect \
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--format '{{index .Config.Labels "org.opencontainers.image.revision"}}' \
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"$CANDIDATE" 2>/dev/null || true)"
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"${CANDIDATE}" 2>/dev/null || true)"
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if [[ -z "$revision" || "$revision" == "<no value>" ]]; then
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if [[ -z "${Revision}" || "${Revision}" == "<no value>" ]]; then
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warn "image carries no org.opencontainers.image.revision label; cannot prove provenance"
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elif [[ "$revision" != "$SHA" ]]; then
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notify fail "image ${CANDIDATE} is built from ${revision:0:12}, not ${SHA:0:12} -- refusing to deploy"
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die "provenance mismatch: ${CANDIDATE} declares revision ${revision}, expected ${SHA}"
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elif [[ "${Revision}" != "${SHA}" ]]; then
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notify fail "image ${CANDIDATE} is built from ${Revision:0:12}, not ${SHA:0:12} -- refusing to deploy"
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die "provenance mismatch: ${CANDIDATE} declares revision ${Revision}, expected ${SHA}"
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else
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log "provenance revision label matches ${SHA:0:12}"
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fi
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DEPLOY_IMAGE="$(image_digest_ref "$CANDIDATE")"
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if [[ -z "$DEPLOY_IMAGE" ]]; then
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DEPLOY_IMAGE="$(image_digest_ref "${CANDIDATE}")"
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if [[ -z "${DEPLOY_IMAGE}" ]]; then
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warn "could not resolve a digest for ${CANDIDATE}; deploying by tag instead"
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DEPLOY_IMAGE="$CANDIDATE"
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DEPLOY_IMAGE="${CANDIDATE}"
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else
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log "pinned ${DEPLOY_IMAGE}"
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fi
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@@ -297,10 +297,10 @@ write_rollback_record() {
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}
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check_health() {
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local attempt=1 body
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while (( attempt <= CD_HEALTH_RETRIES )); do
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body="$(curl -fsS --max-time 5 "$CD_HEALTH_URL" 2>/dev/null || true)"
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if [[ -n "$body" ]]; then
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local Attempt=1 Body
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while (( Attempt <= CD_HEALTH_RETRIES )); do
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Body="$(curl -fsS --max-time 5 "${CD_HEALTH_URL}" 2>/dev/null || true)"
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if [[ -n "${Body}" ]]; then
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if python3 -c '
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import json, sys
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key, want = sys.argv[1], sys.argv[2]
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@@ -309,20 +309,20 @@ try:
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except Exception:
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sys.exit(1)
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sys.exit(0 if str(data.get(key, "")).lower() == want.lower() else 1)
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' "$CD_HEALTH_EXPECT_KEY" "$CD_HEALTH_EXPECT_VALUE" <<<"$body"; then
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log "health ok after ${attempt} attempt(s): ${body}"
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' "${CD_HEALTH_EXPECT_KEY}" "${CD_HEALTH_EXPECT_VALUE}" <<<"${Body}"; then
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log "health ok after ${Attempt} attempt(s): ${Body}"
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return 0
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fi
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fi
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log "health not ready (attempt ${attempt}/${CD_HEALTH_RETRIES}), retrying in ${CD_HEALTH_INTERVAL}s"
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sleep "$CD_HEALTH_INTERVAL"
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(( attempt++ ))
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log "health not ready (attempt ${Attempt}/${CD_HEALTH_RETRIES}), retrying in ${CD_HEALTH_INTERVAL}s"
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sleep "${CD_HEALTH_INTERVAL}"
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(( Attempt++ ))
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done
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warn "health check never passed: last response was '${body:-<no response>}'"
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warn "health check never passed: last response was '${Body:-<no response>}'"
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return 1
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}
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if [[ $DRY_RUN -eq 1 ]]; then
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if [[ ${DRY_RUN} -eq 1 ]]; then
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log "dry run: would recreate service ${CD_COMPOSE_SERVICE} with ${CD_IMAGE_ENV_VAR}=${DEPLOY_IMAGE}"
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log "dry run: would health-check ${CD_HEALTH_URL}"
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log "dry run complete -- no changes made"
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@@ -352,18 +352,18 @@ fi
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# ---------------------------------------------------------------- rollback ---
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if [[ "$CD_ROLLBACK_ON_FAILURE" != "true" ]]; then
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if [[ "${CD_ROLLBACK_ON_FAILURE}" != "true" ]]; then
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notify fail "health check failed for ${SHA:0:12}; rollback disabled, stack left on the new image"
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die "health check failed and rollback is disabled for this target"
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fi
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if [[ -z "$PREVIOUS_IMAGE" ]]; then
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if [[ -z "${PREVIOUS_IMAGE}" ]]; then
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notify fail "health check failed for ${SHA:0:12} and there is no previous image to roll back to"
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die "health check failed; no previous image recorded, leaving the stack as it is"
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fi
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warn "health check failed -- rolling back to ${PREVIOUS_IMAGE}"
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if compose_up "$PREVIOUS_IMAGE" && check_health; then
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if compose_up "${PREVIOUS_IMAGE}" && check_health; then
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notify fail "deploy of ${SHA:0:12} failed health check; rolled back to the previous image successfully"
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die "deploy failed health check; rolled back to ${PREVIOUS_IMAGE}"
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fi
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