check-iso: extracted ISO checking and information extraction into a separate script

1 files changed, 208 insertions, 0 deletions

diff --git a/check-iso b/check-iso
new file mode 100755
index 0000000..65b2c57
--- /dev/null
+++ b/check-iso
@@ -0,0 +1,208 @@
+#!/bin/bash
+
+# parameters and default values
+ARCH="i686"
+DATE=$(date +%Y.%m.%d)
+ISO="archlinux32-${DATE}-${ARCH}.iso"
+OUTPUT_DIR="${HOME}/archisos"
+#Andreas Baumann (sign) <mail@andreasbaumann.cc>
+SIGN_KEY='16194A82231E9EF823562181C8E8F5A0AF9BA7E7'
+# Archlinux 32 Release Key <release@archlinux32.org>
+#SIGN_KEY='33CA3597B0D161AAE4173F65C17F1214114574A4'
+
+usage() {
+  >&2 echo ""
+  >&2 echo "check-iso: checks sanity of ISOs built for Archlinux32 and returns data about the ISO"
+  >&2 echo ""
+  >&2 echo "possible options:"
+  >&2 echo "  -h|--help:          show this help and exit"
+  >&2 echo "  --iso               name of ISO to be checked, default is '${ISO}'."  
+  >&2 echo "  --output-dir        where to write the isos, default is '${OUTPUT_DIR}."
+  >&2 echo "  --check             check sanity of the image, returns an exit code only."
+  >&2 echo "  --expected-sign-key expected PGP key the ISO has to be signed with, default '${SIGN_KEY}'."
+  >&2 echo "  --md5sum            get md5 of the ISO."
+  >&2 echo "  --sha512sum         get sha512sum of the ISO."
+  >&2 echo "  --sign-key          get GPG signing key of the ISO."  
+  >&2 echo "  --size              get size of the ISO."
+  >&2 echo "  --kernel-version    get version of the kernel on the ISO."  
+  >&2 echo "  --no-cleanup        do not clean up tmpdir after run, for debugging."
+  [ -z "$1" ] && exit 1 || exit "$1"
+}
+
+# fail on first error
+set -e
+
+# cleanup hook
+tmp_dir="$(mktemp -d)"
+cleanup() {
+  if mountpoint -q "${tmp_dir}"; then
+    sudo umount "${tmp_dir}"
+  fi
+  rm -rf --one-file-system "${tmp_dir}"
+}
+trap cleanup EXIT
+
+eval set -- "$(
+  getopt -o h \
+  --long help \
+  --long iso: \
+  --long output-dir: \
+  --long check \
+  --long expected-sign-key: \
+  --long md5sum \
+  --long sha512sum \
+  --long sign-key \
+  --long size \
+  --long kernel-version \
+  -n "$(basename "$0")" -- "$@" || \
+  echo usage
+)"
+
+iso="$ISO"
+output_dir="${OUTPUT_DIR}"
+check=0
+expected_sign_key="${SIGN_KEY}"
+md5sum=0
+sha512sum=0
+sign_key=0
+size=0
+kernel_version=0
+
+while [ $# -gt 0 ]; do
+  case "$1" in
+    '--iso')
+      shift
+      iso="$1"
+      ;;
+    '--output-dir')
+      shift
+      output_dir="$1"
+      ;;
+    '--check')
+      check=1
+      ;;
+    '--expected-sign-key')
+      shift
+      expected_sign_key="$1"
+      ;;
+    '--md5sum')
+      md5sum=1
+      ;;
+    '--sha512sum')
+      sha512sum=1
+      ;;
+    '--sign-key')
+      sign_key=1
+      ;;
+    '--size')
+      size=1
+      ;;
+    '--kernel-version')
+      kernel_version=1
+      ;;
+    '--help'|'-h')
+      usage 0
+    ;;
+    '--')
+      shift
+      break
+    ;;
+    *)
+      >&2 printf 'Whoops, option "%s" is not yet implemented!\n' "$1" >&2
+      exit 42
+    ;;
+  esac
+  shift
+done
+
+if [ $# -gt 0 ]; then
+  >&2 echo 'Too many arguments.' >&2
+  exit 2
+fi
+
+if [ "${md5sum}" = 1 ]; then
+  md5sum="$(
+    grep "\s${iso/}\$" "${output_dir}/md5sums" | \
+      awk '{print $1}'
+  )"
+  echo "${md5sum}"
+fi
+
+if [ "${sha512sum}" = 1 ]; then
+  sha512sum="$(
+    grep "\s${iso/}\$" "${output_dir}/sha512sums" | \
+      awk '{print $1}'
+  )"
+  echo "${sha512sum}"
+fi
+
+if [ "${sign_key}" = 1 -o "${check}" = 1 ]; then
+  sign_keys="$(
+    printf '%s\n' $(
+      gpg --status-fd=1 --verify "${output_dir}/${iso}.sig" "${output_dir}/${iso}" 2> /dev/null | \
+        grep '^\[GNUPG:] VALIDSIG [0-9A-F]\+ ' | \
+        cut -d' ' -f3
+    ) | \
+      sort -u
+  )"
+
+  if [ $(echo "${sign_keys}" | grep -c '\S') -ne 1 ]; then
+    >&2 echo 'Not exactly one key used for signing the iso:'
+    >&2 echo "'${sign_keys}'"
+    exit 1
+  fi
+
+  sign_key="${sign_keys}"
+
+  if [ "${sign_key}" != "${expected_sign_key}" ]; then
+    >&2 printf "Isos are signed with key '%s' instead of '%s'.\n" \
+       "${sign_key}" \
+       "${expected_sign_key}"
+    exit 1
+  fi
+
+  if [ "${check}" = 0 ]; then
+	echo "${sign_key}"
+  fi
+fi
+
+if [ "${size}" = 1 ]; then
+  size="$(
+    printf 'scale=1; %s/1024/1024\n' "$(stat -c'%s' "${output_dir}/${iso}")" | \
+      bc
+  )"
+  echo "${size}"
+fi
+
+if [ "${kernel_version}" = 1 -o "${check}" = 1 ]; then
+  sudo mount -o loop,ro "${output_dir}/${iso}" "${tmp_dir}"
+  kernels="$(
+    printf '%s\n' $(
+      find "${tmp_dir}/arch" \
+        -maxdepth 1 \
+        -name 'pkglist.*.txt' \
+        -not -name 'pkglist.x86_64.txt' \
+        -execdir cat {} \; \
+        | sed '
+          s/^linux\s\+\([^-]\+-[^-]\+\)$/\1/
+          t
+          d
+        '
+      ) | \
+      sort -u
+  )"
+  sudo umount "${tmp_dir}"
+
+  if [ $(echo "${kernels}" | grep -c '\S') -ne 1 ]; then
+    >&2 echo 'Not exactly one kernel on the iso:'
+    >&2 echo "${kernels}"
+    exit 1
+  fi
+  
+  kernel_version="${kernels}"
+  if [ "${check}" = 0 ]; then
+    echo "${kernel_version}"
+  fi
+fi
+
+exit 0