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;bin: hledger-script-example: explain shebang commands better

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Simon Michael 2024-07-02 13:34:48 +01:00
parent 21465c050b
commit cf0c7c2ef8
1 changed files with 20 additions and 6 deletions
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bin/hledger-script-example.hs
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@ -1,11 +1,25 @@
#!/usr/bin/env stack
-- stack runghc --verbosity error --package hledger
-- stack runghc --verbosity error --package hledger --package hledger-lib --package text --package safe
-- stack script --compile --resolver lts-20.13 --verbosity error --package hledger --package text
-- stack script --compile --resolver lts-20.13 --verbosity error --package hledger --package hledger-lib --package text --package safe
-- The topmost stack command above is used to run this script.
-- stack script uses released hledger, stack runghc uses local hledger source.
-- This script currently requires local hledger source, for Hledger.Cli.Script.
-- This script is run by the "stack runghc" command above.
-- This command expects to be running in a copy of the hledger source code.
-- Its advantage is that it uses that latest hledger source version.
-- To show more progress output, change --verbosity to info.
-- The main haskell package needed for scripting is "hledger".
-- To make more packages available for import, add more --package options.
--
-- For more robustness, use the "stack script" command below instead.
-- This uses a released version of hledger, and does not need the hledger source code.
-- The version of hledger (and haskell libraries, and ghc) is determined by
-- the stackage snapshot (lts-X.Y or nightly-YYYY-MM-DD).
--
-- stack script --snapshot lts-22.27 --verbosity error --package hledger --package text
-- (https://www.stackage.org/lts-22.27 with hledger-1.32.3, ghc-9.6.5.)
--
-- stack script --snapshot nightly-2024-07-02 --verbosity error --package hledger --package hledger-lib --package text --compile
-- (https://www.stackage.org/nightly-2024-07-02 with hledger-1.34, ghc-9.8.2.
-- The --compile flag makes it compile the script to a faster binary.)
--
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{-# LANGUAGE OverloadedStrings, PackageImports #-}