Add snapcraft

.gitignore

@@ -1,3 +1,5 @@
 .stack-work/
 hascard.cabal
-*~
+*~
+*.snap
+images/

snap/snapcraft.yaml

@@ -0,0 +1,43 @@
+name: hascard # you probably want to 'snapcraft register <name>'
+base: core18 # the base snap is the execution environment for this snap
+# version: '0.1.0.0' # just for humans, typically '1.2+git' or '1.3.2'
+adopt-info: hascard
+summary: A TUI for reviewing notes using 'flashcards' written with markdown-like syntax # 79 char long summary
+description: |
+  Hascard is a text-based user interface for reviewing notes using 'flashcards'.
+  Cards are written in markdown-like syntax. Please see the README file on
+  GitHub at <https://github.com/Yvee1/hascard#readme> for more information.
+
+grade: stable # must be 'stable' to release into candidate/stable channels
+confinement: strict # use 'strict' once you have the right plugs and slots
+
+apps:
+  hascard:
+    command: bin/hascard
+    plugs:
+      - home
+
+parts:
+  hascard:
+    # See 'snapcraft plugins'
+    plugin: nil
+    source: .
+    override-pull: |
+      snapcraftctl pull
+      snapcraftctl set-version "$(grep version package.yaml | awk '{ print $NF }')"
+    override-build: |
+      if [ ! -x "$(command -v stack)" ]; then
+        curl -sSL https://get.haskellstack.org/ | sh
+      fi
+      stack build --copy-bins
+    organize:
+      /root/.local/bin/hascard: bin/hascard
+    stage-packages:
+      - ncurses-term
+      - libncurses5-dev
+      - libncursesw5-dev
+    build-packages:
+      - curl
+      - ncurses-term
+      - libncurses5-dev
+      - libncursesw5-dev

src/UI/CardSelector.hs

@@ -11,6 +11,7 @@ import Control.Monad.IO.Class
 import Data.Functor (($>))
 import Lens.Micro.Platform
 import System.FilePath ((</>), takeBaseName)
+import System.Environment (lookupEnv)
 import Parser
 import UI.BrickHelpers
 import UI.FileBrowser (runFileBrowserUI)
@@ -151,9 +152,16 @@ addRecent s = do
 
 getRecentsFile :: IO FilePath
 getRecentsFile = do
-  xdg <- D.getXdgDirectory D.XdgData "hascard"
-  D.createDirectoryIfMissing True xdg
-  return (xdg </> "recents")
+  maybeSnap <- lookupEnv "SNAP_USER_DATA"
+  xdg <- D.getXdgDirectory D.XdgConfig "hascard"
+
+  let dir = case maybeSnap of
+                Just path | not (null path) -> path
+                          | otherwise       -> xdg
+                Nothing                     -> xdg
+  D.createDirectoryIfMissing True dir
+
+  return (dir </> "recents")
 
 runFileBrowser :: IO ()
 runFileBrowser = do

src/UI/Settings.hs

@@ -8,6 +8,7 @@ import Control.Monad (void)
 import Data.Functor (($>))
 import Data.Map.Strict (Map, (!))
 import System.FilePath ((</>))
+import System.Environment (lookupEnv)
 import UI.BrickHelpers
 import qualified Data.Map.Strict as M
 import qualified Graphics.Vty as V
@@ -121,9 +122,15 @@ parseSettings = read
 
 getSettingsFile :: IO FilePath
 getSettingsFile = do
+  maybeSnap <- lookupEnv "SNAP_USER_DATA"
   xdg <- D.getXdgDirectory D.XdgConfig "hascard"
-  D.createDirectoryIfMissing True xdg
-  return (xdg </> "settings")
+
+  let dir = case maybeSnap of
+                Just path | not (null path) -> path
+                          | otherwise       -> xdg
+                Nothing                     -> xdg
+  D.createDirectoryIfMissing True dir
+  return (dir </> "settings")
 
 defaultSettings :: Settings
 defaultSettings = M.fromList [(0, False), (1, True), (2, False)]