add basic Uwsgi module

Signed-off-by: Félix Sipma <felix.sipma@no-log.org>

1 files changed, 54 insertions, 0 deletions

diff --git a/src/Propellor/Property/Uwsgi.hs b/src/Propellor/Property/Uwsgi.hs
new file mode 100644
index 00000000..b1b567b4
--- /dev/null
+++ b/src/Propellor/Property/Uwsgi.hs
@@ -0,0 +1,54 @@
+-- | Maintainer: Félix Sipma <felix+propellor@gueux.org>
+
+module Propellor.Property.Uwsgi where
+
+import Propellor
+import qualified Propellor.Property.File as File
+import qualified Propellor.Property.Apt as Apt
+import qualified Propellor.Property.Service as Service
+import System.Posix.Files
+
+type ConfigFile = [String]
+
+appEnabled :: HostName -> ConfigFile -> RevertableProperty
+appEnabled hn cf = enable <!> disable
+  where
+	enable = check test prop
+		`describe` ("uwsgi app enabled " ++ hn)
+		`requires` appAvailable hn cf
+		`requires` installed
+		`onChange` reloaded
+	  where
+		test = not <$> doesFileExist (appVal hn)
+		prop = property "uwsgi app in place" $ makeChange $
+			createSymbolicLink target dir
+		target = appValRelativeCfg hn
+		dir = appVal hn
+	disable = trivial $ File.notPresent (appVal hn)
+		`describe` ("uwsgi app disable" ++ hn)
+		`requires` installed
+		`onChange` reloaded
+
+appAvailable :: HostName -> ConfigFile -> Property NoInfo
+appAvailable hn cf = ("uwsgi app available " ++ hn) ==>
+	appCfg hn `File.hasContent` (comment : cf)
+  where
+	comment = "# deployed with propellor, do not modify"
+
+appCfg :: HostName -> FilePath
+appCfg hn = "/etc/uwsgi/apps-available/" ++ hn
+
+appVal :: HostName -> FilePath
+appVal hn = "/etc/uwsgi/apps-enabled/" ++ hn
+
+appValRelativeCfg :: HostName -> FilePath
+appValRelativeCfg hn = "../apps-available/" ++ hn
+
+installed :: Property NoInfo
+installed = Apt.installed ["uwsgi"]
+
+restarted :: Property NoInfo
+restarted = Service.restarted "uwsgi"
+
+reloaded :: Property NoInfo
+reloaded = Service.reloaded "uwsgi"