From 757e35df1bc571cbe414b62cce1d6d3b0eca93b5 Mon Sep 17 00:00:00 2001
From: Andrew Cady <d@jerkface.net>
Date: Mon, 12 Oct 2020 13:08:14 -0400
Subject: hacks and fixes, features and fixtures, axes and fackses

---
 fsmgr.hs  | 17 +++++++++++------
 selfstrap | 35 ++++++++++++++++++++++++++---------
 2 files changed, 37 insertions(+), 15 deletions(-)

diff --git a/fsmgr.hs b/fsmgr.hs
index bd4e303..dca488e 100644
--- a/fsmgr.hs
+++ b/fsmgr.hs
@@ -38,7 +38,7 @@ noParent (ParentImageConfigFile _) = False
 noParent (SeededImage _ _) = False
 
 dynamicNames :: FilePath -> FilePath
-dynamicNames = replace "$(karch)" uname . replace "$(debarch)" debarch
+dynamicNames = replace "$(kver)" (snd uname) . replace "$(karch)" (fst uname) . replace "$(debarch)" debarch
 
 chomp :: String -> String
 chomp = takeWhile (/= '\n')
@@ -53,10 +53,10 @@ getDebianCodename = unsafePerformIO $ do
   (Stdout codename) <- cmd "sh -c" [". /etc/os-release && printf '%s' \"$VERSION_CODENAME\""]
   return codename
 
-uname :: String
+uname :: (String, String)
 uname = unsafePerformIO $ do
   Stdout out <- cmd "uname -r"
-  return $ last . wordsBy '-' . head . lines $ out
+  pure $ (reverse *** reverse . tail) . break (== '-') . reverse . head . lines $ out
 
 data AptListCfg =
   AptListCfg
@@ -225,8 +225,13 @@ buildInitialImage :: DiskImageConfig -> FilePath -> FilePath -> Action ()
 buildInitialImage DiskImageConfig{..} mountpoint out = do
   case initialImage of
     ParentImageConfigFile f -> do
-      let parent = "_build" </> f -<.> "btrfs"
-      need [parent]
+      let cwdParent = f -<.> "btrfs"
+          buildDirParent = "_build" </> cwdParent
+      parent <- liftIO (IO.doesFileExist cwdParent) >>= \case
+        True -> return cwdParent
+        False -> do
+          need [buildDirParent]
+          return buildDirParent
       cmd_ "cp --reflink" [parent, out]
       cmd_ "btrfstune -f -S0" [out]
       cmd_ "btrfstune -fu" [out]
@@ -437,7 +442,7 @@ cgroupChroot groupName mnt args = do
   -- TODO: unshare hostname & set from /etc/hostname inside root
   cmd_ (Cwd mnt) (WithStderr False)
     "unshare --ipc --uts --cgroup --mount --pid --fork chroot ."
-    "sh -exc" ["mount -t proc proc /proc; mount -t devpts devpts /dev/pts; hostname -F /etc/hostname; exec \"$@\""]
+    "sh -exc" ["mount -t proc proc /proc; mount -t devpts devpts /dev/pts; if [ -e /etc/hostname ]; then hostname -F /etc/hostname; fi; exec \"$@\""]
     "sh" args
 
 earlyFail :: IO ()
diff --git a/selfstrap b/selfstrap
index 6766c0c..f5574f4 100755
--- a/selfstrap
+++ b/selfstrap
@@ -2,6 +2,7 @@
 debian_mirror=http://httpredir.debian.org/debian
 debian_security_mirror=http://security.debian.org
 EXTRA_PACKAGES='apt debian-archive-keyring locales'
+REAL_DPKG=y
 
 die() { printf 'Error: %s\n' "$*"; exit 1; }
 
@@ -35,7 +36,8 @@ while [ $# -gt 0 ]; do
                     EXTRA_PACKAGES="$EXTRA_PACKAGES $x"
                     shift ;;
         --chroot) CHROOT_PROG=$2; shift ;;
-        --real-apt) REAL_APT_INSTALL=y ;;
+        --real-apt) REAL_APT_INSTALL=y
+                    REAL_DPKG=y;;
         --) shift; break ;;
         *) usage 1 ;;
     esac
@@ -195,12 +197,22 @@ populate_rootfs()
 write_sources_list()
 {
     local dest="$TARGET"/etc/apt/sources.list
-    [ -e "$dest" ] && return
-    printf '%s\n' \
-           "deb  ${debian_mirror}           ${target_release}            main  contrib  non-free"  \
-           "deb  ${debian_mirror}           ${target_release}-backports  main  contrib  non-free"  \
-           "deb  ${debian_security_mirror}  ${target_release}/updates    main  contrib  non-free"  |
-        column -t > "$dest"
+    [ ! "$REWRITE_SOURCES_LIST" -a -e "$dest" ] && return
+    printf 'APT::Default-Release "%s";\n' "$target_release" > "$TARGET"/etc/apt/apt.conf.d/default-release
+    (
+        printf '%s\n' \
+               "deb  ${debian_mirror}           ${target_release}            main  contrib  non-free"  \
+               "deb  ${debian_mirror}           ${target_release}-backports  main  contrib  non-free"  \
+               "deb  ${debian_security_mirror}  ${target_release}/updates    main  contrib  non-free"
+        if [ "$target_release" = stretch ]
+        then
+            printf '%s\n' \
+                   "deb  ${debian_mirror}           buster            main  contrib  non-free"  \
+                   "deb  ${debian_mirror}           buster-backports  main  contrib  non-free"  \
+                   "deb  ${debian_security_mirror}  buster/updates    main  contrib  non-free"
+
+        fi
+    ) | column -t > "$dest"
 }
 
 parse_apt_simul_line()
@@ -337,6 +349,7 @@ apt_extract()
 
 dpkg_unpack_from_apt_actions()
 {
+    set --
     while read line; do
 
         parse_apt_simul_line "$line" || die "parse_apt_simul_line: unexpected output from apt-get: $line"
@@ -350,8 +363,8 @@ dpkg_unpack_from_apt_actions()
         case "$action" in
             Inst)
                 printf 'Unpacking %s\n' "${deb##*/}" >&2
-                if [ "$REAL_APT_INSTALL" ]; then
-                    dpkg --extract "$deb" "$TARGET" || die 'dpkg'
+                if [ "$REAL_DPKG" ]; then
+                    set -- "$@" "$deb"
                 else
                     is_multiarch_same "$package" && multiarch=":$arch" || multiarch=
                     [ "$UNPACK_ONLY" ] && set_status=unpacked || set_status=installed
@@ -363,6 +376,10 @@ dpkg_unpack_from_apt_actions()
             *) die "dpkg_unpack_from_apt_actions: unknown apt simul action: $action" ;;
         esac
     done
+    if [ $# -gt 0 ]; then
+        dpkg --no-triggers --unpack --force-unsafe-io --root="$TARGET" "$deb" || die 'dpkg'
+        # dpkg --configure --pending --root="$TARGET"
+    fi
 }
 
 install_etc_passwd()
-- 
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