adebisi-fa
0698a9c9a9
The EXIT trap cannot run on SIGKILL, so a killed run could leave its fpagent-install.* temp dir behind. Sweep those before any network work, scoped to our prefix and this user and only dirs older than a day so a concurrent install is never touched.
111 lines
4.2 KiB
Bash
Executable File
111 lines
4.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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# install.sh — download and install the latest YOUreka Fingerprint Agent
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# (fpagent) release on this machine.
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#
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# Hosted at https://tools.yrka.app/fpagent/install.sh and meant to be piped
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# straight into bash on a field laptop:
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#
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# curl -fsSL https://tools.yrka.app/fpagent/install.sh | bash
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#
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# It downloads the bundle, verifies its sha256, then hands off to the bundle's
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# own installer, which handles libfprint, the udev rule, plugdev and the
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# systemd service. Every flag is forwarded to that installer, e.g.:
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#
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# curl -fsSL https://tools.yrka.app/fpagent/install.sh | bash -s -- --enable-service
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# curl -fsSL https://tools.yrka.app/fpagent/install.sh | bash -s -- --check
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#
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# The private release is reached through the tools app, so no credentials are
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# needed here.
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set -euo pipefail
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BASE="${FPAGENT_BASE_URL:-https://tools.yrka.app/fpagent}"
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say() { printf '%s\n' "$*"; }
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die() { printf '[FAIL] %s\n' "$*" >&2; exit 1; }
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usage() {
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cat <<EOF
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Usage: curl -fsSL ${BASE}/install.sh | bash -s -- [installer options]
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Downloads the latest fpagent release, verifies it, and runs its installer.
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Options are forwarded to that installer:
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--check preflight and report only; change nothing
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--offline never touch the network; fail if dependencies are missing
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--enable-service install and enable a systemd service (starts at boot)
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--service-user NAME user for the service (default: the invoking user)
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--install-path PATH binary destination (default: /usr/local/bin/fpagent)
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--uninstall remove the binary, the udev rule and the service
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-h, --help the installer's help
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Environment:
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FPAGENT_BASE_URL override the download base (default: ${BASE})
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EOF
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}
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for arg in "$@"; do
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case "$arg" in
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-h | --help)
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usage
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exit 0
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;;
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esac
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done
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for cmd in curl tar sha256sum python3 find; do
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command -v "$cmd" >/dev/null 2>&1 || die "$cmd is required but not installed"
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done
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tmpbase="${TMPDIR:-/tmp}"
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# Sweep scratch left by an earlier run that was SIGKILLed: the EXIT trap cannot
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# run then (that is the one signal it cannot catch). Scoped to our own prefix,
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# this user, and dirs older than a day, so a concurrent install is never touched.
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# Runs before any network work so cleanup is not skipped when the fetch fails.
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find "$tmpbase" -maxdepth 1 -mindepth 1 -type d -uid "$(id -u)" \
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-name 'fpagent-install.*' -mtime +0 -exec rm -rf {} + 2>/dev/null || true
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# Offline bundles ship the libfprint .deb closure for a specific Ubuntu
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# release; prefer the one matching this machine, else fall back to the generic
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# online bundle (whose installer apt-get's the dependency).
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codename="$(sed -n 's/^VERSION_CODENAME=//p' /etc/os-release 2>/dev/null | tr -d '"')"
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say "Fetching the latest Fingerprint Agent release..."
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meta="$(curl -fsSL "${BASE}/releases/latest")" || die "could not fetch the release list from ${BASE}"
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readout="$(python3 -c '
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import json, sys
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codename = sys.argv[1]
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release = json.loads(sys.argv[2])
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assets = [a["name"] for a in release.get("assets", [])]
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def pick(suffix):
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return next((n for n in assets if n.endswith(suffix) and not n.endswith(".sha256")), "")
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name = pick("-ubuntu-" + codename + "-x86_64.tar.gz") if codename else ""
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if not name:
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name = pick("-linux-x86_64.tar.gz")
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print(release.get("tag", "") + "\t" + name)
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' "$codename" "$meta")" || die "could not parse the release metadata"
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tag="${readout%%$'\t'*}"
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asset="${readout#*$'\t'}"
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[ -n "$tag" ] && [ -n "$asset" ] || die "no compatible bundle in the latest release (x86_64 required)"
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say " release ${tag}"
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say " bundle ${asset}"
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tmp="$(mktemp -d "$tmpbase/fpagent-install.XXXXXXXX")"
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trap 'rm -rf "$tmp"' EXIT
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get() { curl -fsSL "$1" -o "$2" || die "download failed: $1"; }
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say "Downloading and verifying..."
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get "${BASE}/releases/download/${tag}/${asset}" "${tmp}/${asset}"
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get "${BASE}/releases/download/${tag}/${asset}.sha256" "${tmp}/${asset}.sha256"
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(cd "$tmp" && sha256sum -c "${asset}.sha256") || die "checksum verification failed for ${asset}"
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tar xzf "${tmp}/${asset}" -C "$tmp" || die "could not extract ${asset}"
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[ -x "${tmp}/install.sh" ] || die "the bundle does not contain install.sh"
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say "Running the installer (pass --enable-service to start at boot)..."
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"${tmp}/install.sh" "$@"
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