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-rw-r--r--src/Propellor/Git/Config.hs47
-rw-r--r--src/Propellor/Git/VerifiedBranch.hs51
2 files changed, 98 insertions, 0 deletions
diff --git a/src/Propellor/Git/Config.hs b/src/Propellor/Git/Config.hs
new file mode 100644
index 00000000..97835231
--- /dev/null
+++ b/src/Propellor/Git/Config.hs
@@ -0,0 +1,47 @@
+module Propellor.Git.Config where
+
+import Propellor.Git
+import Utility.Process
+import Utility.Exception
+import Utility.SafeCommand
+import Utility.Monad
+
+import Control.Monad
+
+getGitConfigValue :: String -> IO (Maybe String)
+getGitConfigValue key = do
+ value <- catchMaybeIO $
+ takeWhile (/= '\n')
+ <$> readProcess "git" ["config", key]
+ return $ case value of
+ Just v | not (null v) -> Just v
+ _ -> Nothing
+
+-- `git config --bool propellor.blah` outputs "false" if propellor.blah is unset
+-- i.e. the git convention is that the default value of any git-config setting
+-- is "false". So we don't need a Maybe Bool here.
+getGitConfigBool :: String -> IO Bool
+getGitConfigBool key = do
+ value <- catchMaybeIO $
+ takeWhile (/= '\n')
+ <$> readProcess "git" ["config", "--bool", key]
+ return $ case value of
+ Just "true" -> True
+ _ -> False
+
+setRepoUrl :: String -> IO ()
+setRepoUrl "" = return ()
+setRepoUrl url = do
+ subcmd <- ifM hasOrigin (pure "set-url", pure "add")
+ void $ boolSystem "git" [Param "remote", Param subcmd, Param "origin", Param url]
+ -- same as --set-upstream-to, except origin branch
+ -- may not have been pulled yet
+ branch <- getCurrentBranch
+ let branchval s = "branch." ++ branch ++ "." ++ s
+ void $ boolSystem "git" [Param "config", Param (branchval "remote"), Param "origin"]
+ void $ boolSystem "git" [Param "config", Param (branchval "merge"), Param $ "refs/heads/"++branch]
+
+getRepoUrl :: IO (Maybe String)
+getRepoUrl = getM getGitConfigValue urls
+ where
+ urls = ["remote.deploy.url", "remote.origin.url"]
diff --git a/src/Propellor/Git/VerifiedBranch.hs b/src/Propellor/Git/VerifiedBranch.hs
new file mode 100644
index 00000000..a39bc7e9
--- /dev/null
+++ b/src/Propellor/Git/VerifiedBranch.hs
@@ -0,0 +1,51 @@
+module Propellor.Git.VerifiedBranch where
+
+import Propellor.Base
+import Propellor.Git
+import Propellor.Gpg
+import Propellor.PrivData.Paths
+import Utility.FileMode
+
+{- To verify origin branch commit's signature, have to convince gpg
+ - to use our keyring.
+ - While running git log. Which has no way to pass options to gpg.
+ - Argh!
+ -}
+verifyOriginBranch :: String -> IO Bool
+verifyOriginBranch originbranch = do
+ let gpgconf = privDataDir </> "gpg.conf"
+ writeFile gpgconf $ unlines
+ [ " keyring " ++ keyring
+ , "no-auto-check-trustdb"
+ ]
+ -- gpg is picky about perms
+ modifyFileMode privDataDir (removeModes otherGroupModes)
+ s <- readProcessEnv "git" ["log", "-n", "1", "--format=%G?", originbranch]
+ (Just [("GNUPGHOME", privDataDir)])
+ nukeFile $ privDataDir </> "trustdb.gpg"
+ nukeFile $ privDataDir </> "pubring.gpg"
+ nukeFile $ privDataDir </> "gpg.conf"
+ return (s == "U\n" || s == "G\n")
+
+-- Returns True if HEAD is changed by fetching and merging from origin.
+fetchOrigin :: IO Bool
+fetchOrigin = do
+ branchref <- getCurrentBranch
+ let originbranch = "origin" </> branchref
+
+ void $ actionMessage "Pull from central git repository" $
+ boolSystem "git" [Param "fetch"]
+
+ oldsha <- getCurrentGitSha1 branchref
+
+ whenM (doesFileExist keyring) $
+ ifM (verifyOriginBranch originbranch)
+ ( do
+ putStrLn $ "git branch " ++ originbranch ++ " gpg signature verified; merging"
+ hFlush stdout
+ void $ boolSystem "git" [Param "merge", Param originbranch]
+ , warningMessage $ "git branch " ++ originbranch ++ " is not signed with a trusted gpg key; refusing to deploy it! (Running with previous configuration instead.)"
+ )
+
+ newsha <- getCurrentGitSha1 branchref
+ return $ oldsha /= newsha