working project structure with tests

- restructured project again: splitting into executable and Hash2Pub
  library
- placeholder test file is successfully compiled and run

Hash2Pub/Hash2Pub.cabal

@@ -0,0 +1,108 @@
+cabal-version:       2.4
+
+-- Initial package description 'Hash2Pub.cabal' generated by 'cabal init'.
+--   For further documentation, see http://haskell.org/cabal/users-guide/
+
+-- The name of the package.
+name:                Hash2Pub
+
+-- The package version.  See the Haskell package versioning policy (PVP)
+-- for standards guiding when and how versions should be incremented.
+-- https://pvp.haskell.org
+-- PVP summary:      +-+------- breaking API changes
+--                   | | +----- non-breaking API additions
+--                   | | | +--- code changes with no API change
+version:             0.0.0.1
+
+-- A short (one-line) description of the package.
+synopsis:            a fully-decentralised relay for global hashtag federation in ActivityPub systems
+
+-- A longer description of the package.
+-- description:
+
+-- A URL where users can report bugs.
+-- bug-reports:
+
+-- The license under which the package is released.
+license:             AGPL-3.0-or-later
+
+-- The file containing the license text.
+license-file:        LICENSE
+
+-- The package author(s).
+author:              Trolli Schmittlauch
+
+-- An email address to which users can send suggestions, bug reports, and
+-- patches.
+maintainer:          t.schmittlauch+hackage@orlives.de
+
+-- A copyright notice.
+-- copyright:
+
+category:            Network
+
+-- Extra files to be distributed with the package, such as examples or a
+-- README.
+extra-source-files:  CHANGELOG.md
+
+common deps
+  build-depends:       base ^>=4.12.0.0, containers ^>=0.6.0.1, utf8-string ^>=1.0.1.1, network ^>=2.8.0.1, time ^>=1.8.0.2, cmdargs ^>= 0.10, cryptonite ^>= 0.25
+  ghc-options:         -Wall
+
+
+
+library
+  import: deps
+
+  -- Modules exported by the library.
+  exposed-modules:     Hash2Pub.FediChord
+
+  -- Modules included in this library but not exported.
+  -- other-modules:
+
+  -- LANGUAGE extensions used by modules in this package.
+  other-extensions:    GeneralizedNewtypeDeriving
+
+  -- Directories containing source files.
+  hs-source-dirs: src
+
+  -- Base language which the package is written in.
+  default-language:    Haskell2010
+
+executable Hash2Pub
+  -- Other library packages from which modules are imported.
+  import: deps
+
+  -- .hs or .lhs file containing the Main module.
+  main-is:             Main.hs
+
+  -- Modules included in this executable, other than Main.
+  other-modules:       FediChord
+
+  -- LANGUAGE extensions used by modules in this package.
+  other-extensions:    GeneralizedNewtypeDeriving
+
+  -- Directories containing source files.
+  -- hs-source-dirs: .
+
+  -- Base language which the package is written in.
+  default-language:    Haskell2010
+
+
+test-suite Hash2Pub-test
+  -- Test dependencies.
+  import: deps
+
+  -- Base language which the package is written in.
+  default-language:    Haskell2010
+
+  -- The interface type and version of the test suite.
+  type:                exitcode-stdio-1.0
+
+  -- The directory where the test specifications are found.
+  hs-source-dirs:      test
+
+  -- The entrypoint to the test suite.
+  main-is:             MyLibTest.hs
+  build-depends:       hspec, Hash2Pub
+