Carsier

Carsier is a build system brings experience of Cargo and Coursier to Scala.

Features

1. Declare dependencies in toml file
   • Not turing complete
   • Use features to select (TODO)
   • Support both crates, scala and java packages

   [dependencies]
   # deps with org is by default a scala dependency
   breeze = { version = "*", org = "org.scalanlp" }
   # or specify it is a java dependency
   postgresql = { version = "*", org = "org.postgresql", java = true }
   # or a crates
   mycrate = "*"

2. Relative module system
   • implicit module name from file system
     • a/b/c.scala => a.b.c
     • a/b/c/lib.scala => a.b.c
     • a/b.c.scala => a.b.c (TODO)
   • import from relative
     • % => root, %% => current, %^ => parent
     • %: => crates (TODO)
   • 2 ways to handle relative module
     • preprocess (text based, must starts_with "import %")
     • scala plugin (TODO)

   /// it would automatically convert to
   /// ```scala
   /// package crates.crate_name.path.to.file;
   /// import _root_.{crates => %:}; // TODO
   /// import %:.{crate_name => %};
   /// import %:.crate_name.path.to.{file => %%};
   /// import %:.crate_name.path.{to => %^};
   /// import %:.crate_name.{path => %^^};
   /// import %:.{crate_name => %^^^};
   /// ```
   package %%;

   • you could also specify package name by absolute/relative path

   /// in src/factory/users/extends/lib.scala where %% resolves to %.factory.extends
   /// would have package name to `crates.crate_name.factory.users.extra`
   package %^.extra;

3. target & features
   • default target lib, bin, examples, tests
     • bin expands to bin_main, detect src/main.scala by default
     • examples expands to [example_name, ...], for name of files in examples folder
     • tests expands to [test_name] for name in test folder
   • features with name or path.to.dep/name could be selected
   • there're special conflicting features os and target
     • os = { conflict = ture, group = [ 'macos', 'unix', 'linux', 'windows' ] }
     • target = { conflict = true, group = [ 'x86_64', 'x86' ] }
   • virtual features would be set iff all conditions in group met
     • virtual = { virtual = true, group = [ 'a', 'b', 'c|d', '!(a|c)&d' ] }
     • logic operators !, |, &
     • compare operators (only for version now) <, <=, >, >=, =, !=
   • files would be automacitally select by feature (TODO)
     • filename-feature1-feature2.scala
     • all file would be included iff all conditions in group met

Cli

• carsier new demo && cd demo
• carsier build or resolve
• carsier run # TODO