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2.1.17

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resolve

resolve lists the transitive dependencies of one or more other dependencies. Use like

$ cs resolve io.circe::circe-generic:0.12.3
com.chuusai:shapeless_2.13:2.3.3:default
io.circe:circe-core_2.13:0.12.3:default
io.circe:circe-generic_2.13:0.12.3:default
io.circe:circe-numbers_2.13:0.12.3:default
org.scala-lang:scala-library:2.13.0:default
org.typelevel:cats-core_2.13:2.0.0:default
org.typelevel:cats-kernel_2.13:2.0.0:default
org.typelevel:cats-macros_2.13:2.0.0:default

Note that this only relies on metadata files (POMs in particular), and doesn't download any JAR.

Tree

When passed -t or --tree, resolve prints a dependency tree rather than a list:

$ cs resolve -t io.circe::circe-generic:0.12.3
  Result:
└─ io.circe:circe-generic_2.13:0.12.3
   ├─ com.chuusai:shapeless_2.13:2.3.3
   │  └─ org.scala-lang:scala-library:2.13.0
   ├─ io.circe:circe-core_2.13:0.12.3
   │  ├─ io.circe:circe-numbers_2.13:0.12.3
   │  │  └─ org.scala-lang:scala-library:2.13.0
   │  ├─ org.scala-lang:scala-library:2.13.0
   │  └─ org.typelevel:cats-core_2.13:2.0.0
   │     ├─ org.scala-lang:scala-library:2.13.0
   │     ├─ org.typelevel:cats-kernel_2.13:2.0.0
   │     │  └─ org.scala-lang:scala-library:2.13.0
   │     └─ org.typelevel:cats-macros_2.13:2.0.0
   │        └─ org.scala-lang:scala-library:2.13.0
   └─ org.scala-lang:scala-library:2.13.0

Each dependency has its own direct dependencies as children, which themselves have their own dependencies as children, this way recursively.

Reverse tree

When passed -T or --reverse-tree, resolve prints trees the other way around, going from a dependency to its dependees, allowing to spot which dependencies are bringing another one in:

$ cs resolve -T io.circe::circe-generic:0.12.3
  Result:
├─ com.chuusai:shapeless_2.13:2.3.3
│  └─ io.circe:circe-generic_2.13:0.12.3
├─ io.circe:circe-core_2.13:0.12.3
│  └─ io.circe:circe-generic_2.13:0.12.3
├─ io.circe:circe-generic_2.13:0.12.3
├─ io.circe:circe-numbers_2.13:0.12.3
│  └─ io.circe:circe-core_2.13:0.12.3
│     └─ io.circe:circe-generic_2.13:0.12.3
├─ org.scala-lang:scala-library:2.13.0
│  ├─ com.chuusai:shapeless_2.13:2.3.3
│  │  └─ io.circe:circe-generic_2.13:0.12.3
…

What depends on

When there are many transitive dependencies, these reverse trees can become hard to read. --what-depends-on allows to focus on one particular dependency, like

$ cs resolve io.circe::circe-generic:0.12.3 \
    --what-depends-on org.typelevel:cats-core_2.13
  Result:
└─ org.typelevel:cats-core_2.13:2.0.0
   └─ io.circe:circe-core_2.13:0.12.3
      └─ io.circe:circe-generic_2.13:0.12.3

This reads like "cats-core is brought by circe-core, itself brought by circe-generic (root dependency)".

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