davidandClaude Opus 5.5
b2a16471fd
013acac's update (in use 2026-08-14 to 2026-10-19) copies the new update over itself with sudo cp while bash is still reading it, so bash reads on from byte 1484 of the new file: today, the middle of the logo, and the update dies with a syntax error. Put a line at exactly that byte that execs the new update, in a here-document a normal run skips. Found by 30-upgrade-from-baseline at ca658dc; the test replays 013acac's update. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
128 lines
5.7 KiB
Bash
Executable File
128 lines
5.7 KiB
Bash
Executable File
#!/bin/bash
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# Updates from before 2026-10-19 (013acac's) copy this file over themselves
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# while bash is still reading them, then read on from byte 1484 of the new copy.
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# The exec line below starts at exactly that byte, so they run this update
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# afresh; the rest of the block pads it into place, and in a normal run the
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# block is a here-document nothing reads. Keep the exec line at byte 1484:
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# tests/update.bats checks it.
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: << 'FROM_OLD_UPDATE'
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This block is padding for old updates. This block is padding for old updates.
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This block is padding for old updates. This block is padding for old updates.
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This block is padding for old updates. This block is padding for old updates.
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This block is padding for old updates. This block is padding for old updates.
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This block is padding for old updates. This block is padding for old updates.
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This block is padding for old updates. This block is padding for old updates.
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This block is padding for old updates. This block is padding for old updates.
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This block is padding for old updates. This block is padding for old updates.
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This block is padding for old updates. This block is padding for old updates.
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This block is padding for old updates. This block is padding for old updates.
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This block is padding for old updates. This block is padding for old updates.
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This block is padding for old updates. This block is padding for old updates.
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This block is padding for old updates. This block is padding for old updates.
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...................
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exec ~/.local/bin/update
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FROM_OLD_UPDATE
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# The whole script is wrapped in { ...; exit; } so bash parses all of it before
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# running anything. That way, replacing this file mid-run (e.g. by git pull and
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# the copy below) can't make the running copy read a mix of old and new text.
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{
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# Install a script atomically (copy to a temp file, then rename over the target)
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install_script() {
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local tmp
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tmp="$(mktemp "$2.XXXXXX")" && cp "$1" "$tmp" && chmod 755 "$tmp" && mv -f "$tmp" "$2"
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}
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# Print the logo
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print_logo() {
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cat << "EOF"
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██
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█ ██
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██ ██████ █████ ██ █████ █████ ████ ██ █████ ██
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██ ██ ██ ███ ███████ ██ ██ ██ ██ ██ ████████ ██ ██ ███████
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█████ ██████ ██ ██ ██████ ██ ████████ ██ █ ███████ ██ ██
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██ ██████ ███████ ██████ ██ ██████ ██████ ██████ ███████
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EOF
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}
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# Clear screen and show logo
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clear
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print_logo
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COREDESKTOP="$HOME/.local/share/coredesktop"
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echo "Updating CoreDesktop..."
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if [[ -z "$UPDATE_REEXECED" ]] && ! git -C "$COREDESKTOP" pull --ff-only; then
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echo "WARNING: could not pull the latest CoreDesktop; running the update hooks already on disk."
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export UPDATE_PULL_FAILED=1
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fi
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mkdir -p "$COREDESKTOP/updates.d"
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install_script "$COREDESKTOP/update" ~/.local/bin/update
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install_script "$COREDESKTOP/refresh" ~/.local/bin/refresh
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install_script "$COREDESKTOP/sibling" ~/.local/bin/sibling
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install_script "$COREDESKTOP/version" ~/.local/bin/version
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install_script "$COREDESKTOP/configure" ~/.local/bin/configure
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install_script "$COREDESKTOP/audit" ~/.local/bin/audit
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if [[ -z "$UPDATE_REEXECED" ]]; then
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export UPDATE_REEXECED=1
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exec ~/.local/bin/update
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fi
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# An upgrade that runs out of disk space part way through can leave the system
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# half-upgraded. Set UPDATE_FORCE=1 to skip this check.
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MIN_FREE_GIB=10
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FREE_KIB="$(df -k --output=avail / | tail -n 1 | tr -d ' ')"
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if [[ -z "$UPDATE_FORCE" && "$FREE_KIB" =~ ^[0-9]+$ ]] && (( FREE_KIB < MIN_FREE_GIB * 1024 * 1024 )); then
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echo "Only $(( FREE_KIB / 1024 / 1024 )) GiB free on /; updating needs at least $MIN_FREE_GIB GiB."
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echo "Free up space (sudo paccache -rk1 clears old cached packages), or run: UPDATE_FORCE=1 update"
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exit 1
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fi
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# Ask for the password once, then keep sudo's cached credentials fresh until
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# update exits, so long-running hooks don't stop for a password again.
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sudo -v || exit 1
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while kill -0 $$ 2>/dev/null; do sudo -n -v; sleep 60; done 2>/dev/null &
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SUDO_KEEPALIVE_PID=$!
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trap 'kill "$SUDO_KEEPALIVE_PID" 2>/dev/null' EXIT
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FAILED=()
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[[ -n "$UPDATE_PULL_FAILED" ]] && FAILED+=("git pull")
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# Each hook runs in its own subshell so a cd, set -e, exit, or stray variable
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# in one hook can't leak into or abort the hooks after it.
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for plugin in "$COREDESKTOP/updates.d/"*.sh; do
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[ -f "$plugin" ] || continue
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(
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unset -f is_installed run_update
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source "$plugin"
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# A hook without run_update does its work as it's sourced, so its
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# last command's status is the hook's
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status=$?
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if declare -f run_update > /dev/null; then
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if ! declare -f is_installed > /dev/null || is_installed; then
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run_update
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fi
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else
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exit "$status"
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fi
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)
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# Checked separately: under `( ... ) ||`, bash would ignore set -e inside the hook
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[ $? -eq 0 ] || FAILED+=("$(basename "$plugin")")
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done
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if (( ${#FAILED[@]} > 0 )); then
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echo "Done, with errors in: ${FAILED[*]}"
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exit 1
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fi
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echo "Done."
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exit 0
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}
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