ekklesiaandClaude Opus 5
a3dba6e8fb
A fresh classroom needed two things installed by hand on every box: Google Chrome, which is not in Debian, and the DVD codecs, which Debian cannot ship. Both now happen on their own. ekklesia-classroom-provision.service runs after every boot and does the work that needs the network and the apt lock, neither of which a package postinst can have. Each step returns immediately if it is already done, so a provisioned machine costs nothing and a machine that was offline the first time gets another go at the next boot. Nothing there is allowed to fail the boot: a classroom with no DVD codecs is still a working classroom, and it says so in the log rather than silently. The postinst enables the service but deliberately does not start it. Every OTA update reboots the moment the install finishes, and an apt run killed by that reboot would leave dpkg half-configured. Chrome comes from Google's own repository rather than a one-off .deb, so it keeps getting security updates. Google's package migrates whatever we write into a deb822 file of its own, so the repository is looked for across every source file instead of only the one we would write; otherwise a machine that had Chrome removed would end up with two copies of the same repository. The DVD codec helper previously assumed deb822 sources and did nothing on a machine using a classic /etc/apt/sources.list, which is what the hardware actually runs. It now handles both formats, and only ever adds a missing component to an existing Debian entry — so it cannot produce a duplicate repository or a duplicate component however many times it runs, and third-party repositories like Chrome's are never touched. It also answers libdvd-pkg's debconf questions, so nothing blocks on a prompt in a service with no terminal. Tested against fixture APT trees for classic sources.list, deb822 .sources, contrib already enabled, repeated runs, third-party repositories and the awkward real lines: bracketed options, indentation, trailing comments and flat repositories. Co-Authored-By: Claude Opus 5 <[email protected]>
90 lines
2.6 KiB
Bash
Executable File
90 lines
2.6 KiB
Bash
Executable File
#!/bin/bash
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set -uo pipefail
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# Installs Google Chrome from Google's own APT repository.
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#
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# Chrome is not in Debian, and a classroom is not usable without it, so
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# a fresh machine provisions it itself rather than waiting for someone to
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# install it by hand on every box. Using the repository rather than a
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# one-off .deb means Chrome keeps getting security updates.
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#
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# sudo classroom-chrome-setup
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#
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# Idempotent: once Chrome is installed this returns immediately.
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KEYRING=/etc/apt/keyrings/google-chrome.gpg
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# The same path Google's own package manages, so the two cannot end up
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# as two copies of the same repository.
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LIST=/etc/apt/sources.list.d/google-chrome.list
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REPOSITORY="https://dl.google.com/linux/chrome/deb/"
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KEY_URL="https://dl.google.com/linux/linux_signing_key.pub"
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log() {
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echo "[classroom-chrome-setup] $1"
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}
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if command -v google-chrome >/dev/null 2>&1; then
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log "Google Chrome is already installed; nothing to do"
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exit 0
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fi
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if [[ "$(id -u)" -ne 0 ]]; then
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log "must be run as root: sudo classroom-chrome-setup"
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exit 1
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fi
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install -d -m 0755 /etc/apt/keyrings
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if [[ ! -s "$KEYRING" ]]; then
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log "fetching Google's signing key"
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if ! curl -fsS --retry 3 --max-time 60 "$KEY_URL" |
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gpg --dearmor --batch --yes --output "$KEYRING.new"; then
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rm -f "$KEYRING.new"
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log "could not fetch Google's signing key; is this machine online?"
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exit 1
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fi
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chmod 0644 "$KEYRING.new"
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mv "$KEYRING.new" "$KEYRING"
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fi
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# Google's own package migrates whatever we write here into a deb822
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# /etc/apt/sources.list.d/google-chrome.sources of its own, so look for
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# the repository everywhere rather than only in the file we would write.
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# Otherwise a machine that has had Chrome removed would end up with two
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# copies of the same repository.
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if ! grep -rqsF "dl.google.com/linux/chrome" \
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/etc/apt/sources.list /etc/apt/sources.list.d/; then
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log "adding the Google Chrome repository"
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printf 'deb [arch=amd64 signed-by=%s] %s stable main\n' \
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"$KEYRING" "$REPOSITORY" > "$LIST"
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chmod 0644 "$LIST"
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else
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log "the Google Chrome repository is already configured"
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fi
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export DEBIAN_FRONTEND=noninteractive
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# The OTA install or the update timer may hold the lock; wait it out
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# rather than failing the whole provisioning run.
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APT=(apt-get -o DPkg::Lock::Timeout=600)
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log "updating package lists"
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if ! "${APT[@]}" update; then
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log "apt-get update failed; is this machine online?"
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exit 1
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fi
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log "installing google-chrome-stable"
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if ! "${APT[@]}" install -y google-chrome-stable; then
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log "could not install Google Chrome"
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exit 1
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fi
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log "Google Chrome installed"
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