feat: setup: first setup check: is hledger in PATH ?

hledger/Hledger/Cli.hs

@@ -421,7 +421,7 @@ main = exitOnExceptions $ withGhcDebug' $ do
         | manFlag   -> runManForTopic "hledger"  mmodecmdname
 
         -- 6.5.2. builtin command which should not require or read the journal - run it
-        | cmdname `elem` ["commands","demo","help","test"] ->
+        | cmdname `elem` ["commands","demo","help","setup","test"] ->
           cmdaction opts (ignoredjournal cmdname)
 
         -- 6.5.3. builtin command which should create the journal if missing - do that and run it

hledger/Hledger/Cli/Commands.hs

@@ -295,7 +295,7 @@ commandsList progversion othercmds =
   ," diff                     compare an account's transactions in two journals"
   ,"+git                      save or view journal file history simply in git"       -- hledger-git
   ,"+pijul                    save or view journal file history simply in pijul"     -- hledger-pijul
-  ," setup                    check and help set up various installation things"
+  ," setup                    check and show the status of the hledger installation"
   ," test                     run some self tests"
   ,""
     -----------------------------------------80-------------------------------------

hledger/Hledger/Cli/Commands/Setup.hs

@@ -1,6 +1,8 @@
 {-|
 
-Check and help set up various installation things.
+Check and show the status of the hledger installation,
+show extra info and hints,
+and offer to fix problems where possible.
 
 -}
 
@@ -15,27 +17,18 @@ module Hledger.Cli.Commands.Setup (
 )
 where
 
--- import Data.Default (def)
--- import System.FilePath (takeFileName)
--- import Data.List (intercalate, nub, sortOn)
--- import Data.List.Extra (nubSort)
--- import qualified Data.Map as Map
--- import Data.Maybe (fromMaybe)
--- import Data.HashSet (size, fromList)
--- import qualified Data.Text as T
--- import qualified Data.Text.Lazy as TL
--- import qualified Data.Text.Lazy.Builder as TB
--- import Data.Time.Calendar (Day, addDays, diffDays)
--- import Data.Time.Clock.POSIX (getPOSIXTime)
--- import GHC.Stats
--- -- import System.Console.CmdArgs.Explicit hiding (Group)
--- import System.Mem (performMajorGC)
--- import Text.Printf (printf)
--- import Text.Tabular.AsciiWide
-
+import System.FilePath
+import Data.Text (Text)
+import qualified Data.Text as T
+import qualified Data.Text.IO as T
 import Hledger
 import Hledger.Cli.CliOptions
--- import Hledger.Cli.Utils (writeOutputLazyText)
+import Control.Monad
+import System.Info
+import System.Directory
+import System.IO
+import Safe
+-- import Text.Printf (printf)
 
 
 setupmode = hledgerCommandMode
@@ -45,20 +38,127 @@ setupmode = hledgerCommandMode
   hiddenflags
   ([], Just $ argsFlag "[QUERY]")
 
--- like Register.summarisePostings
--- | Print various statistics for the journal.
+-- | 1. Check and show the status of various aspects of the hledger installation.
+-- 2. Show extra info and hints on how to fix problems.
+-- 3. When possible, offer to help fix problems, interactively.
 setup :: CliOpts -> Journal -> IO ()
-setup _opts@CliOpts{rawopts_=_rawopts, reportspec_=_rspec} _j = do
-  print "setup"
+setup _opts@CliOpts{rawopts_=_rawopts, reportspec_=_rspec} _ignoredj = do
+  -- This command is not given a journal and should not use _ignoredj;
+  -- instead detect it ourselves when we are ready.
+  let
+    p ok ymsg nmsg =
+      putStrLn $ unwords $ if ok then ["", y, "", ymsg] else ["", n, "", nmsg]
+      where
+        y = "yes ✅"
+        n = "no ❌"
 
+  putStrLn "hledger:"
 
-  -- let today = _rsDay rspec
-  --     verbose = boolopt "verbose" rawopts
-  --     q = _rsQuery rspec
-  --     l = ledgerFromJournal q j
-  --     intervalspans = snd $ reportSpanBothDates j rspec
-  --     ismultiperiod = length intervalspans > 1
-  --     (ls, txncounts) = unzip $ map (showLedgerStats verbose l today) intervalspans
-  --     numtxns = sum txncounts
-  --     txt = (if ismultiperiod then id else TL.init) $ TB.toLazyText $ unlinesB ls
-  -- writeOutputLazyText opts txt
+  putStr "- in PATH ?"
+  pathexes <- findExecutables progname
+  home <- getHomeDirectory
+  appdata <- getXdgDirectory XdgData ""
+  otherexes <- flip findExecutablesInDirectories progname $
+    [home </> ".local/bin"
+    ,home </> ".cabal/bin"
+    ,home </> ".nix-profile/bin"
+    ,"/opt/homebrew/bin"
+    ,"/usr/local/bin"
+    ,"/usr/bin"
+    ]
+    ++ [appdata </> "local/bin" | os == "mingw32"]
+    ++ [appdata </> "cabal/bin" | os == "mingw32"]
+  let
+    ok = not $ null pathexes
+    pathexe  = quoteIfNeeded $ headDef (error' "showing nonexistent executable") pathexes
+    otherexe = quoteIfNeeded $ headDef (error' "showing nonexistent executable") otherexes
+    otherdir = takeDirectory otherexe
+    hint = if null otherexes
+      then ("Add " <> progname <> "'s directory to your shell's PATH.")
+      else unlines
+        ["Add " <> otherdir <> " to PATH in your shell config."
+        ,"  Eg on unix: echo 'export PATH=" <> otherdir <> ":$PATH' >> ~/.profile"
+        ,"  and start a new shell session."
+        ]
+  p ok pathexe hint
+
+  -- putStr "- runnable ?"
+
+  -- putStr "- up to date ?"
+
+  -- putStr "- native binary ?"
+
+  -- putStr "- eget installed ?"
+
+  putStr "\n"
+
+  -- putStrLn "config:"
+  -- putStr "- user config file exists ?"
+  -- putStr "\n"
+  -- putStr "- local config masking user config ?"
+  -- putStr "\n"
+  -- putStr "- config file readable ?"
+  -- putStr "\n"
+  -- putStr "- common general options configured ?"
+  -- putStr "\n"
+  -- putStr "  --pretty --ignore-assertions --infer-costs"
+  -- putStr "\n"
+  -- putStr "  print --explicit --show-costs"
+  -- putStr "\n"
+  -- putStr "\n"
+
+  -- putStrLn "files:"
+  -- putStr "- default journal file exists ?"
+  -- putStr "\n"
+  -- putStr "- default journal file readable ?"
+  -- putStr "\n"
+  -- putStr "\n"
+
+  -- putStrLn "accounts:"
+  -- putStr "- all account types declared or detected ?"
+  -- putStr "\n"
+  -- putStr "  asset, liability, equity, revenue, expense, cash, conversion"
+  -- putStr "\n"
+  -- putStr "- untyped accounts ?"
+  -- putStr "\n"
+  -- putStr "- all used accounts declared ?"
+  -- putStr "\n"
+  -- putStr "\n"
+
+  -- putStrLn "commodities:"
+  -- putStr "- all used commodities declared ?"
+  -- putStr "\n"
+  -- putStr "\n"
+
+  -- putStrLn "tags:"
+  -- putStr "- all used tags declared ?"
+  -- putStr "\n"
+  -- putStr "\n"
+
+{- | Ensure there is a journal file at the given path, creating an empty one if needed.
+On Windows, also ensure that the path contains no trailing dots
+which could cause data loss (see 'isWindowsUnsafeDotPath').
+-}
+_ensureJournalFileExists :: FilePath -> IO ()
+_ensureJournalFileExists f = do
+  when (os == "mingw32" && isWindowsUnsafeDotPath f) $
+    error' $
+      "Part of file path \"" <> show f <> "\"\n ends with a dot, which is unsafe on Windows; please use a different path.\n"
+  exists <- doesFileExist f
+  unless exists $ do
+    hPutStrLn stderr $ "Creating hledger journal file " <> show f
+    -- note Hledger.Utils.UTF8.* do no line ending conversion on windows,
+    -- we currently require unix line endings on all platforms.
+    newJournalContent >>= T.writeFile f
+
+{- | Does any part of this path contain non-. characters and end with a . ?
+Such paths are not safe to use on Windows (cf #1056).
+-}
+isWindowsUnsafeDotPath :: FilePath -> Bool
+isWindowsUnsafeDotPath = any (\x -> last x == '.' && any (/= '.') x) . splitDirectories
+
+-- | Give the content for a new auto-created journal file.
+newJournalContent :: IO Text
+newJournalContent = do
+  d <- getCurrentDay
+  return $ "; journal created " <> T.pack (show d) <> " by hledger\n"

hledger/Hledger/Cli/Commands/Setup.md

@@ -1,6 +1,6 @@
 ## setup
 
-Check and help set up various installation things.
+Check and show the status of the hledger installation.
 
 ```flags
 Flags:

hledger/hledger.m4.md

@@ -6515,7 +6515,7 @@ If you have installed more [add-on commands](../scripts.md), they also will be l
 
 - [check](#check)                                  - check for various kinds of error in the data
 - [diff](#diff)                                    - compare account transactions in two journal files
-- [setup](#setup)                                  - check and help set up various installation things
+- [setup](#setup)                                  - check and show the status of the hledger installation
 - [test](#test)                                    - run self tests