hledger/hledger/Hledger/Cli/Version.hs
2022-03-25 20:45:06 -10:00

105 lines
4.0 KiB
Haskell

{-# LANGUAGE CPP #-}
{-
Version number-related utilities. See also the Makefile.
-}
module Hledger.Cli.Version (
ProgramName,
PackageVersion,
VersionString,
packageversion,
progname,
versionStringWith,
)
where
import GitHash (GitInfo, giHash, giCommitDate)
import System.Info (os, arch)
import Data.List (intercalate)
import Data.Maybe (fromMaybe)
type ProgramName = String
type PackageVersion = String
type VersionString = String
-- | The VERSION string defined with -D in this package's package.yaml/.cabal file
-- (by Shake setversion), if any. Normally a dotted number string with 1-3 components.
packageversion :: PackageVersion
packageversion =
#ifdef VERSION
VERSION
#else
""
#endif
-- | The name of this package's main executable.
progname :: ProgramName
progname = "hledger"
-- | Given possible git state info from the build directory (or an error message, which is ignored),
-- the name of a program (executable) in the currently building package,
-- and the package's version, make a complete version string. Here is the logic:
--
-- * Program name, OS and architecture are always shown.
-- * The package version is always shown.
-- * If there is git info at build time, the latest commit hash and commit date are shown.
-- * (TODO, requires adding --match support to githash:
-- If there are tags matching THISPKG-[0-9]*, the latest one is used to calculate patch level
-- (number of commits since tag), and if non-zero, it and the branch name are shown.)
--
-- Some example outputs:
--
-- * A homebrew binary, not built in git repo: hledger-ui 1.24, mac-aarch64
-- * A CI release build, built in git repo at release tag: hledger-ui 1.24.1-g455b35293-20211210, mac-x86_64
-- * (TODO) A dev build, built in git repo: hledger-ui 1.24.1+1-g4abd8ef10-20211210 (1.24-branch), mac-x86_64
--
-- This function requires git log to show the default (rfc2822-style) date format,
-- so that must not be overridden by a log.date git config variable.
--
versionStringWith :: Either String GitInfo -> ProgramName -> PackageVersion -> VersionString
versionStringWith egitinfo progname packageversion =
concat [ progname , " " , version , ", " , os' , "-" , arch ]
where
os' | os == "darwin" = "mac"
| os == "mingw32" = "windows"
| otherwise = os
version = case egitinfo of
Left _err -> packageversion
Right gitinfo ->
case words $ giCommitDate gitinfo of
-- git log's date format is normally --date=default ("similar to --date=rfc2822")
_weekday:mon:day:_localtime:year:_offset:_ ->
intercalate "-" [packageversion , hash, date]
where
hash = 'g' : take 9 (giHash gitinfo) -- like git describe
date = concat [year,mm,dd]
where
mm = fromMaybe mon $ lookup mon $ [
("Jan","01")
,("Feb","02")
,("Mar","03")
,("Apr","04")
,("May","05")
,("Jun","06")
,("Jul","07")
,("Aug","08")
,("Sep","09")
,("Oct","10")
,("Nov","11")
,("Dec","12")
]
dd = (if length day < 2 then ('0':) else id) day
-- but could be overridden by a log.date config variable in repo or user git config
_ -> packageversion
-- -- | Given a program name, return a precise platform-specific executable
-- -- name suitable for naming downloadable binaries. Can raise an error if
-- -- the version and patch level was not defined correctly at build time.
-- binaryfilename :: String -> String
-- binaryfilename progname = concat
-- [progname, "-", buildversion, "-", os', "-", arch, suffix]
-- where
-- (os',suffix) | os == "darwin" = ("mac","" :: String)
-- | os == "mingw32" = ("windows",".exe")
-- | otherwise = (os,"")