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 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

(limited to 'fsmgr.hs')

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 ()
-- 
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