From c7a69fbf870e0521b02d4c063e7fdcd4d3b5431b Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Mon, 15 Oct 2018 15:53:29 +0200
Subject: update-kernel-config: update PKGBUILD alongside config (tested only
 on core/linux, so far)

---
 update-kernel-config | 116 ++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 97 insertions(+), 19 deletions(-)

diff --git a/update-kernel-config b/update-kernel-config
index 3fed852..e257941 100755
--- a/update-kernel-config
+++ b/update-kernel-config
@@ -5,12 +5,18 @@ if [ $# -ne 2 ]; then
   exit 2
 fi
 
+git_repo_path='/usr/src/archlinux32/packages/'
+upstream_git_path='/usr/src/archlinux/packages'
+vagrant_path=$(
+  readlink -f ~/"virtual-boxes/archlinux32-test"
+)
+
 old_revision=$(
   sed -n '
     s/^# upstream git\( revision\)\?: *//
     T
     p
-  ' "/usr/src/archlinux32/packages/$1/$2/PKGBUILD"
+  ' "${git_repo_path}/$1/$2/PKGBUILD"
 )
 
 if [ -z "${old_revision}" ]; then
@@ -20,13 +26,13 @@ if [ -z "${old_revision}" ]; then
 fi
 
 config_names=$(
-  git -C "/usr/src/archlinux32/packages/$1/$2" archive HEAD -- | \
+  git -C "${git_repo_path}/$1/$2" archive HEAD -- | \
     tar -t | \
     grep '^config\($\|\.\)'
 )
 
 diff=$(
-  git -C "/usr/src/archlinux/packages/$2/repos/$1-x86_64" diff "${old_revision}" HEAD -- config | \
+  git -C "${upstream_git_path}/$2/repos/$1-x86_64" diff "${old_revision}" HEAD -- config | \
     grep '^[+-].' | \
     grep -v '^+++\|^---'
 )
@@ -45,7 +51,7 @@ for config_name in ${config_names}; do
           T
           p
         '
-    )" "/usr/src/archlinux32/packages/$1/$2/${config_name}"
+    )" "${git_repo_path}/$1/$2/${config_name}"
     printf '%s\n' "${diff}" | \
       sed -n '
         s/^+//
@@ -53,32 +59,104 @@ for config_name in ${config_names}; do
         p
       '
   } | \
-    sponge "/usr/src/archlinux32/packages/$1/$2/${config_name}"
+    sponge "${git_repo_path}/$1/$2/${config_name}"
 done
 
 sed -i '
   1 s/^#.*$/# upstream git revision: '"$(
-    git -C "/usr/src/archlinux/packages" rev-parse HEAD
+    git -C "${upstream_git_path}" rev-parse HEAD
   )"'/
   s/'"$(
-    git -C "/usr/src/archlinux/packages/$2/repos/$1-x86_64" archive "${old_revision}" -- config | \
+    git -C "${upstream_git_path}/$2/repos/$1-x86_64" archive "${old_revision}" -- config | \
       tar -Ox | \
       sha256sum | \
       awk '{print $1}'
   )"'/'"$(
-    git -C "/usr/src/archlinux/packages/$2/repos/$1-x86_64" archive HEAD -- config | \
+    git -C "${upstream_git_path}/$2/repos/$1-x86_64" archive HEAD -- config | \
       tar -Ox | \
       sha256sum | \
       awk '{print $1}'
   )"'/g
-  '"$(
-    for config_name in ${config_names}; do
-      printf 's/'
-      git -C "/usr/src/archlinux32/packages/$1/$2" archive HEAD -- "${config_name}" | \
-        tar -Ox | \
-        sha256sum | \
-        awk '{print $1}' | \
-        tr -d '\n'
-      printf '/SKIP/g\n'
-    done
-  )" "/usr/src/archlinux32/packages/$1/$2/PKGBUILD"
+  ' "${git_repo_path}/$1/$2/PKGBUILD"
+
+if ssh -o ConnectTimeout=1 arch32-test true; then
+  vm_is_running=true
+else
+  vm_is_running=false
+fi
+
+if ! ${vm_is_running}; then
+  cd "${vagrant_path}"
+  vagrant up
+fi
+
+{
+  git -C "${upstream_git_path}/$2/repos/$1-x86_64" archive HEAD --
+  for config_name in ${config_names}; do
+    tar -c -C "${git_repo_path}/$1/$2" "${config_name}"
+  done
+} | \
+  ssh arch32-test '
+    rm -rf --one-file-system "'"$2"'"
+    mkdir "'"$2"'"
+    tar -xiC "'"$2"'"
+  '
+ssh arch32-test '
+  cd "'"$2"'"
+  cat >> PKGBUILD
+  sed -i '"'"'
+    '"$(
+      for config_name in ${config_names}; do
+        printf 's/'
+        git -C "${git_repo_path}/$1/$2" archive HEAD -- "${config_name}" | \
+          tar -Ox | \
+          sha256sum | \
+          awk '{print $1}' | \
+          tr -d '\n'
+        printf '/SKIP/g\n'
+      done
+    )"'
+    /^arch=[^#]*any/!{
+      /^arch=(/s/(/(i486 i686 pentium3 /
+    }
+    /make oldconfig/ s/^\s*#//
+    s/^}$/return 1\n\0/
+  '"'"' PKGBUILD
+' < \
+  "${git_repo_path}/$1/$2/PKGBUILD"
+ssh arch32-test '
+  cd "'"$2"'"
+  eval "$(grep '"'"'^_srcname='"'"' PKGBUILD)"
+  for arch in i486 i686; do
+    rm -rf --one-file-system src pkg
+    CARCH=${arch} makepkg -fcrs --asdeps --noconfirm
+    mv src/${_srcname}/.config config.${arch}
+  done
+'
+for config_name in ${config_names}; do
+  scp "arch32-test:$2/${config_name}" "${git_repo_path}/$1/$2/"
+done
+sed -i "$(
+  for config_name in ${config_names}; do
+    printf 's/'
+    git -C "${git_repo_path}/$1/$2" archive HEAD -- "${config_name}" | \
+      tar -Ox | \
+      sha256sum | \
+      awk '{print $1}' | \
+      tr -d '\n'
+    printf '/'
+    sha256sum "${git_repo_path}/$1/$2/${config_name}" | \
+      awk '{print $1}' | \
+      tr -d '\n'
+    printf '/g\n'
+  done
+)" "${git_repo_path}/$1/$2/PKGBUILD"
+git -C "${git_repo_path}/$1/$2" commit PKGBUILD ${config_names} -m "$1/$2: new version => new config => new checksum"
+if ! ${vm_is_running}; then
+  ssh arch32-test 'sudo poweroff'
+  err=$?
+  if [ ${err} -eq 255 ]; then
+    err=0
+  fi
+  exit ${err}
+fi
-- 
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