forked from heavy-duty/rig
72 lines
2.9 KiB
Bash
72 lines
2.9 KiB
Bash
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#!/usr/bin/env bash
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# Shared reader for the runner's own on-disk config ($RUNNER_DIR/.runner).
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# Sourced by the runner-* commands; never executed on its own.
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# .runner is JSON, parsed here with grep/sed on purpose: a rig-bootstrapped box
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# has no jq, and installing one to read two fields would be a poor trade.
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#
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# json_field <file> <key> — the first string value for <key>, empty if absent.
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# Never fails: callers run under `set -e` with pipefail, where a grep that
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# matches nothing would otherwise kill the script with no message. A missing
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# key is a fact to test for, not an error to die on.
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json_field() {
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grep -o "\"$2\"[[:space:]]*:[[:space:]]*\"[^\"]*\"" "$1" 2>/dev/null \
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| head -n1 | sed 's/.*:[[:space:]]*"//; s/"$//' || true
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}
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# runner_repo_url <runner_dir> — the repository this box's runner is registered
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# to, empty when nothing is registered there.
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runner_repo_url() {
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[ -e "$1/.runner" ] || return 0
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json_field "$1/.runner" gitHubUrl
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}
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# runner_agent_name <runner_dir> — the runner's name, empty when unregistered.
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runner_agent_name() {
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[ -e "$1/.runner" ] || return 0
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json_field "$1/.runner" agentName
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}
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# assert_runner_repo <runner_dir> <owner/repo>
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#
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# Returns 0 when the box has no runner, or has one already registered to
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# <owner/repo>: re-running `install` against the repo the box is already on is
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# real convergence — it re-uses the binary, skips registration, exits 0.
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#
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# Returns 1, explaining itself on stderr, when the runner is registered to a
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# DIFFERENT repo. Skipping *that* is not convergence, it is ignoring the
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# argument: `install` would skip its configure step, restart the service on the
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# OLD repo, and report success — leaving the repo you asked for with no runner
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# and its jobs queued against one that will never come. Moving a runner between
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# repos is a trust-boundary act, so it belongs to `repoint`, out loud.
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assert_runner_repo() {
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local dir="$1" repo="$2" current wanted
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[ -e "$dir/.runner" ] || return 0
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current="$(runner_repo_url "$dir")"
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wanted="https://github.com/${repo}"
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if [ -z "$current" ]; then
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printf 'rig-runner: ERROR: %s\n' \
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"${dir}/.runner exists but names no repository — this box's registration cannot
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be read, so rig cannot tell whether it is already on ${wanted}.
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Wipe the local registration and install again:
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rig runner remove --local" >&2
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return 1
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fi
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if [ "$current" = "$wanted" ]; then
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return 0
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fi
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printf 'rig-runner: ERROR: %s\n' \
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"this box's runner is already registered to ${current}, not ${wanted}.
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install will not move a runner between repositories: it would leave the service
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running against the OLD repo and report success. To move it in one act:
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rig runner repoint --repo ${repo}
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or take it off the old repo first, then install:
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rig runner remove (deregisters from ${current}; needs a removal token)
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rig runner remove --local (when you cannot mint one)" >&2
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return 1
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}
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