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authorJoey Hess2017-04-09 15:00:33 -0400
committerJoey Hess2017-04-09 15:00:48 -0400
commit4ba09ab6844cc3fc3e94856da22190555b697193 (patch)
tree05e4bede709b56c79ca36e2c942a817415b20a59 /src
parentb61b77941f3774e6d7373bab9607b70f4acbd7e0 (diff)
added Propellor.Property.Bootstrap (untested)
This commit was sponsored by Jake Vosloo on Patreon.
Diffstat (limited to 'src')
-rw-r--r--src/Propellor/Property/Bootstrap.hs95
-rw-r--r--src/Propellor/Property/Cmd.hs1
2 files changed, 96 insertions, 0 deletions
diff --git a/src/Propellor/Property/Bootstrap.hs b/src/Propellor/Property/Bootstrap.hs
new file mode 100644
index 00000000..6158d967
--- /dev/null
+++ b/src/Propellor/Property/Bootstrap.hs
@@ -0,0 +1,95 @@
+module Propellor.Property.Bootstrap (RepoSource(..), bootstrappedFrom, clonedFrom) where
+
+import Propellor.Base
+import Propellor.Bootstrap
+import Propellor.Property.Chroot
+
+import Data.List
+
+-- | Where a propellor repository should be bootstrapped from.
+data RepoSource
+ = GitRepoUrl String
+ | GitRepoOutsideChroot
+
+-- | Bootstraps a propellor installation into
+-- /usr/local/propellor/
+--
+-- Normally, propellor is already bootstrapped when it runs, so this
+-- property is not useful. However, this can be useful inside a
+-- chroot used to build a disk image, to make the disk image
+-- have propellor installed.
+--
+-- The git repository is cloned (or pulled to update if it already exists).
+--
+-- All build dependencies are installed, using distribution packages
+-- or falling back to using cabal.
+bootstrappedFrom :: RepoSource -> Property Linux
+bootstrappedFrom reposource = go `requires` clonedFrom reposource
+ where
+ go :: Property Linux
+ go = property "Propellor bootstrapped" $ do
+ system <- getOS
+ assumeChange $ exposeTrueLocaldir $ buildShellCommand
+ [ "cd " ++ localdir
+ , bootstrapPropellorCommand system
+ ]
+
+-- | Clones the propellor repeository into /usr/local/propellor/
+--
+-- GitRepoOutsideChroot can be used when this is used in a chroot.
+-- In that case, it clones the /usr/local/propellor/ from outside the
+-- chroot into the same path inside the chroot.
+--
+-- If the propellor repo has already been cloned, pulls to get it
+-- up-to-date.
+clonedFrom :: RepoSource -> Property Linux
+clonedFrom reposource = property ("Propellor repo cloned from " ++ originloc) $ do
+ ifM needclone
+ ( do
+ let tmpclone = localdir ++ ".tmpclone"
+ system <- getOS
+ assumeChange $ exposeTrueLocaldir $ buildShellCommand
+ [ installGitCommand system
+ , "rm -rf " ++ tmpclone
+ , "git clone " ++ shellEscape originloc ++ " " ++ tmpclone
+ , "mkdir -p " ++ localdir
+ -- This is done rather than deleting
+ -- the old localdir, because if it is bound
+ -- mounted from outside the chroot, deleting
+ -- it after unmounting in unshare will remove
+ -- the bind mount outside the unshare.
+ , "(cd " ++ tmpclone ++ " && tar c) | (cd " ++ localdir ++ " && tar x)"
+ , "rm -rf " ++ tmpclone
+ ]
+ , assumeChange $ exposeTrueLocaldir $ buildShellCommand
+ [ "cd " ++ localdir
+ , "git pull"
+ ]
+ )
+ where
+ needclone = (inChroot <&&> truelocaldirisempty)
+ <||> (liftIO (not <$> doesDirectoryExist localdir))
+ truelocaldirisempty = exposeTrueLocaldir $
+ "test ! -d " ++ localdir ++ "/.git"
+ originloc = case reposource of
+ GitRepoUrl s -> s
+ GitRepoOutsideChroot -> localdir
+
+-- | Runs the shell command with the true localdir exposed,
+-- not the one bind-mounted into a chroot.
+exposeTrueLocaldir :: String -> Propellor Bool
+exposeTrueLocaldir s = do
+ s' <- ifM inChroot
+ ( return $ "unshare -m sh -c " ++ shellEscape
+ ("umount " ++ localdir ++ " && ( " ++ s ++ ")")
+ , return s
+ )
+ liftIO $ boolSystem "sh" [ Param "-c", Param s']
+
+assumeChange :: Propellor Bool -> Propellor Result
+assumeChange a = do
+ ok <- a
+ return (cmdResult ok <> MadeChange)
+
+buildShellCommand :: [String] -> String
+buildShellCommand = intercalate "&&" . map (\c -> "(" ++ c ++ ")")
diff --git a/src/Propellor/Property/Cmd.hs b/src/Propellor/Property/Cmd.hs
index 6b84acb5..f2de1a27 100644
--- a/src/Propellor/Property/Cmd.hs
+++ b/src/Propellor/Property/Cmd.hs
@@ -33,6 +33,7 @@ module Propellor.Property.Cmd (
Script,
scriptProperty,
userScriptProperty,
+ cmdResult,
-- * Lower-level interface for running commands
CommandParam(..),
boolSystem,