rootiest revised this gist 1 month ago. Go to revision
1 file changed, 112 insertions
pin-calf.sh(file created)
| @@ -0,0 +1,112 @@ | |||
| 1 | + | #!/usr/bin/env bash | |
| 2 | + | # pin-calf-0.90.8-4.sh | |
| 3 | + | # Downgrade calf to 0.90.8-4 and pin it. Use --unpin to remove the pin. | |
| 4 | + | ||
| 5 | + | set -euo pipefail | |
| 6 | + | ||
| 7 | + | PKG="calf" | |
| 8 | + | PKGVER="0.90.8-4" | |
| 9 | + | PKGFILE="${PKG}-${PKGVER}-x86_64.pkg.tar.zst" | |
| 10 | + | URL="https://archive.archlinux.org/packages/c/${PKG}/${PKGFILE}" | |
| 11 | + | PACCONF="/etc/pacman.conf" | |
| 12 | + | ||
| 13 | + | usage() { | |
| 14 | + | cat <<EOF | |
| 15 | + | Usage: | |
| 16 | + | $0 # downgrade to ${PKGVER} and pin | |
| 17 | + | $0 --unpin # remove pin for ${PKG} | |
| 18 | + | EOF | |
| 19 | + | } | |
| 20 | + | ||
| 21 | + | ensure_root() { | |
| 22 | + | if [[ $EUID -ne 0 ]]; then | |
| 23 | + | echo "Re-running with sudo..." | |
| 24 | + | exec sudo -E "$0" "$@" | |
| 25 | + | fi | |
| 26 | + | } | |
| 27 | + | ||
| 28 | + | backup_conf() { | |
| 29 | + | [[ -f "${PACCONF}.bak" ]] || cp -a "$PACCONF" "${PACCONF}.bak" | |
| 30 | + | } | |
| 31 | + | ||
| 32 | + | pin_pkg() { | |
| 33 | + | backup_conf | |
| 34 | + | # If IgnorePkg exists, ensure 'calf' is present. Otherwise add a line | |
| 35 | + | # under [options]. This edit is idempotent. | |
| 36 | + | awk -v pkg="$PKG" ' | |
| 37 | + | BEGIN { done=0 } | |
| 38 | + | /^\[options\]/ { | |
| 39 | + | print; inopt=1; next | |
| 40 | + | } | |
| 41 | + | inopt && /^IgnorePkg\s*=.*/ { | |
| 42 | + | if ($0 ~ ("(^|\\s)" pkg "(\\s|$)")) { print; done=1 } | |
| 43 | + | else { print $0 " " pkg; done=1 } | |
| 44 | + | inopt=0; next | |
| 45 | + | } | |
| 46 | + | { print } | |
| 47 | + | END { | |
| 48 | + | if (!done) { | |
| 49 | + | if (inopt) { | |
| 50 | + | print "IgnorePkg = " pkg | |
| 51 | + | } else { | |
| 52 | + | print ""; print "[options]"; print "IgnorePkg = " pkg | |
| 53 | + | } | |
| 54 | + | } | |
| 55 | + | } | |
| 56 | + | ' "$PACCONF" > "${PACCONF}.new" | |
| 57 | + | mv "${PACCONF}.new" "$PACCONF" | |
| 58 | + | } | |
| 59 | + | ||
| 60 | + | unpin_pkg() { | |
| 61 | + | backup_conf | |
| 62 | + | awk -v pkg="$PKG" ' | |
| 63 | + | { | |
| 64 | + | if ($0 ~ /^IgnorePkg\s*=/) { | |
| 65 | + | # remove only exact word matches of pkg | |
| 66 | + | gsub("(^|[ \t])" pkg "([ \t]|$)", " ") | |
| 67 | + | # normalize spaces | |
| 68 | + | sub(/^[ \t]+/, "") | |
| 69 | + | sub(/[ \t]+$/, "") | |
| 70 | + | sub(/[ \t]+/, " ") | |
| 71 | + | # drop line if now just "IgnorePkg =" with nothing after | |
| 72 | + | if ($0 ~ /^IgnorePkg\s*=\s*$/) next | |
| 73 | + | } | |
| 74 | + | ||
| 75 | + | } | |
| 76 | + | ' "$PACCONF" > "${PACCONF}.new" | |
| 77 | + | mv "${PACCONF}.new" "$PACCONF" | |
| 78 | + | } | |
| 79 | + | ||
| 80 | + | install_pkg() { | |
| 81 | + | tmp="$(mktemp -d)" | |
| 82 | + | trap 'rm -rf "$tmp"' EXIT | |
| 83 | + | cd "$tmp" | |
| 84 | + | echo "Downloading ${URL} ..." | |
| 85 | + | curl -fL --retry 3 -O "$URL" | |
| 86 | + | echo "Installing ${PKGFILE} ..." | |
| 87 | + | pacman -U --noconfirm "./${PKGFILE}" | |
| 88 | + | echo "Installed:" | |
| 89 | + | pacman -Qi "$PKG" | sed -n '1,12p' | |
| 90 | + | } | |
| 91 | + | ||
| 92 | + | main() { | |
| 93 | + | if [[ "${1:-}" == "--help" || "${1:-}" == "-h" ]]; then | |
| 94 | + | usage; exit 0 | |
| 95 | + | fi | |
| 96 | + | ||
| 97 | + | if [[ "${1:-}" == "--unpin" ]]; then | |
| 98 | + | ensure_root "$@" | |
| 99 | + | unpin_pkg | |
| 100 | + | echo "Unpinned ${PKG}. You may now upgrade normally." | |
| 101 | + | exit 0 | |
| 102 | + | fi | |
| 103 | + | ||
| 104 | + | ensure_root "$@" | |
| 105 | + | install_pkg | |
| 106 | + | pin_pkg | |
| 107 | + | echo | |
| 108 | + | echo "Pinned ${PKG} at ${PKGVER} via IgnorePkg in ${PACCONF}." | |
| 109 | + | echo "To undo: sudo $0 --unpin" | |
| 110 | + | } | |
| 111 | + | ||
| 112 | + | main "$@" | |
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