From 6428a0dda4545035b36f8e5ae4b4b4952cae07f3 Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Mon, 12 Dec 2016 08:47:18 +0100
Subject: add -n|--noAction

---
 makekernel.in | 111 ++++++++++++++++++++++++++++++++++++++++------------------
 1 file changed, 76 insertions(+), 35 deletions(-)

diff --git a/makekernel.in b/makekernel.in
index be7615c..8a788d2 100644
--- a/makekernel.in
+++ b/makekernel.in
@@ -5,18 +5,25 @@ set -e
 usage () {
   >&2 echo 'makekernel version #VERSION#'
   >&2 echo 'usage:'
-  >&2 echo '  makekernel [ -a | --allowDownload ] [ -c $version | --compileVersion=$version ]:'
+  >&2 echo '  makekernel [ -a | --allowDownload ] [ -c $version | --compileVersion=$version ] [ -n | --noAction ]:'
   >&2 echo '    download and compile kernel'
   >&2 echo '      -a | --allowDownload:'
   >&2 echo '        allow to download complete source instead of patch if necessary'
   >&2 echo '      -c | --compileVersion $version:'
   >&2 echo '        download and compile version $version instead of most current stable'
+  >&2 echo '      -n | --noAction:'
+  >&2 echo '        do not do anything, just print what would be done'
   >&2 echo '  makekernel ( -s | --showVersion ):'
   >&2 echo '    show version of most current stable kernel'
   exit 1
 }
 
 dlExVer () {
+  if ${noAction}
+  then
+    echo "download and verify '$1.xz'"
+    return 0
+  fi
   wget -nd "${proxyPrefix}$1.xz" || wget -nd "$1.xz"
   wget -nd "${proxyPrefix}$1.sign" || wget -nd "$1.sign"
   xz -d "$2.xz"
@@ -46,9 +53,10 @@ then
 fi
 
 eval set -- "$(
-  getopt -o ac:s \
+  getopt -o ac:ns \
     --long allowDownload \
     --long compileVersion: \
+    --long noAction \
     --long showVersion \
     -n "$(basename "$0")" \
   -- "$@" || echo usage
@@ -57,6 +65,7 @@ eval set -- "$(
 allowDownload=false
 forceVersion=false
 showVersion=false
+noAction=false
 
 while true
 do
@@ -73,10 +82,15 @@ do
       forceVersion=true
       shift
     ;;
+    -n|--noAction)
+      ${showVersion} && usage
+      noAction=true
+    ;;
     -s|--showVersion)
       ${allowDownload} && usage
       ${forceVersion} && usage
       ${showVersion} && usage
+      ${noAction} && usage
       showVersion=true
     ;;
     --)
@@ -174,47 +188,74 @@ echo "update type: ${updateType}"
 if [ -n "${patchSrc}" ]
 then
   dlExVer "${patchSrc}" "${patch}"
-  cp -r "${srcDir}" "linux-${curVer}"
-  cd "linux-${curVer}"
-  patch -p1 -i "../${patch}"
-  rm "../${patch}"
+  if ${noAction}
+  then
+    echo "copy '${srcDir}' to 'linux-${curVer}' and patch via '${patch}'"
+  else
+    cp -r "${srcDir}" "linux-${curVer}"
+    cd "linux-${curVer}"
+    patch -p1 -i "../${patch}"
+    rm "../${patch}"
+  fi
 elif [ -n "${dlSrc}" ]
 then
   dlExVer "${dlSrc}" "linux-${curVer}.tar"
-  tar -xf "linux-${curVer}.tar"
-  rm "linux-${curVer}.tar"
+  if ! ${noAction}
+  then
+    tar -xf "linux-${curVer}.tar"
+    rm "linux-${curVer}.tar"
+  fi
 fi
 
-cd "${kernelDir}/linux-${curVer}"
-[ ! -r .config ] && zcat /proc/config.gz > .config
-
-make clean
-make oldconfig
-make
-grep -q '^# CONFIG_MODULES is not set$' .config || make modules_install
-
-kernelImg="$(find ${kernelDir}/linux-${curVer}/arch/ -type f -iname '*image')"
-if [ $(echo "${kernelImg}" | wc -l) -ne 1 ]
+if ${noAction}
 then
-  >&2 echo 'ERROR: Did not find exactly one compiled kernel image:'
-  >&2 echo "${kernelImg}"
-  >&2 echo 'Closing.'
-  exit 1
+  echo "copy config (can't say, from where, right now)"
+else
+  cd "${kernelDir}/linux-${curVer}"
+  [ ! -r .config ] && zcat /proc/config.gz > .config
 fi
 
-echo 'becoming root ...'
+if ${noAction}
+then
+  echo "make clean"
+  echo "make oldconfing"
+  echo "make"
+  echo "possibly: make modules_install"
+  echo
+  echo "as root:"
+  echo "  before_install_hook &&"
+  echo '  install -m644 --owner=root "${kernelImg}" "/boot/vmlinuz-'"${curVer}"'" &&'
+  echo "  grub-mkconfig -o /boot/grub/grub.cfg &&"
+  echo "  after_install_hook"
+else
+  make clean
+  make oldconfig
+  make
+  grep -q '^# CONFIG_MODULES is not set$' .config || make modules_install
 
-err=1
-while [ ${err} -eq 1 ]
-do
-  su -c ' \
-    . #ETCDIR#/makekernel.conf && \
-    before_install_hook && \
-    install -m644 --owner=root "'"${kernelImg}"'" "/boot/vmlinuz-'"${curVer}"'" && \
-    grub-mkconfig -o /boot/grub/grub.cfg && \
-    after_install_hook || \
-    exit 2 \
-  ' && err=0 || err=$?
-done
+  kernelImg="$(find ${kernelDir}/linux-${curVer}/arch/ -type f -iname '*image')"
+  if [ $(echo "${kernelImg}" | wc -l) -ne 1 ]
+  then
+    >&2 echo 'ERROR: Did not find exactly one compiled kernel image:'
+    >&2 echo "${kernelImg}"
+    >&2 echo 'Closing.'
+    exit 1
+  fi
+
+  echo 'becoming root ...'
+
+  err=1
+  while [ ${err} -eq 1 ]
+  do
+    su -c ' \
+      . #ETCDIR#/makekernel.conf && \
+      before_install_hook && \
+      install -m644 --owner=root "'"${kernelImg}"'" "/boot/vmlinuz-'"${curVer}"'" && \
+      grub-mkconfig -o /boot/grub/grub.cfg && \
+      after_install_hook || \
+      exit 2 \
+    ' && err=0 || err=$?
+  done
+fi
 
 echo 'Success.'
-- 
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