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README.md

Pkg3

Build Status Build status codecov

Next-generation package manager for Julia. Still quite alpha. The last commit that works on 0.6 is 4bd137919.

To install, Pkg.clone the Pkg3 repo itself:

Pkg.clone("https://github.com/JuliaLang/Pkg3.jl.git")

Packages are installed under joinpath(homedir(), ".julia", "packages"), so they won't influence the packages that you already have installed.

$ julia

julia> using Pkg3

This gives you a pkg> REPL mode, activated by the ] key. Currently, this supports thee operations: add, rm and up:

pkg> add JSON
INFO: Resolving package versions
INFO: Cloning [682c06a0-de6a-54ab-a142-c8b1cf79cde6] JSON
INFO: Installing JSON v0.13.0 [9003b4622ec7e553]
INFO: Updating project file /Users/stefan/projects/julia/Project.toml
INFO:  [+] JSON = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
INFO: Updating manifest file /Users/stefan/projects/julia/Manifest.toml
INFO:  [34da2185] + Compat v0.31.0
INFO:  [682c06a0] + JSON v0.13.0

pkg> add Compat @0.28
INFO: Resolving package versions
INFO: Installing Compat v0.28.0 [0427af7e2c8610c8]
INFO: Updating project file /Users/stefan/projects/julia/Project.toml
INFO:  [+] Compat = "34da2185-b29b-5c13-b0c7-acf172513d20"
INFO: Updating manifest file /Users/stefan/projects/julia/Manifest.toml
INFO:  [34da2185] ↓ Compat v0.31.0 ⇒ v0.28.0

pkg> rm Compat
INFO: Updating project file /Users/stefan/projects/julia/Project.toml
INFO:  [-] Compat = "34da2185-b29b-5c13-b0c7-acf172513d20"
INFO:  [-] JSON = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
INFO: Updating manifest file /Users/stefan/projects/julia/Manifest.toml
INFO:  [34da2185] - Compat v0.28.0
INFO:  [682c06a0] - JSON v0.13.0

pkg> add JSON @0.10
INFO: Resolving package versions
INFO: Installing JSON v0.10.0 [77699b5cc09b169c]
INFO: Updating project file /Users/stefan/projects/julia/Project.toml
INFO:  [+] JSON = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
INFO: Updating manifest file /Users/stefan/projects/julia/Manifest.toml
INFO:  [34da2185] + Compat v0.31.0
INFO:  [682c06a0] + JSON v0.10.0

pkg> up
INFO: Resolving package versions
INFO: Updating project file /Users/stefan/projects/julia/Project.toml
INFO:  [no changes]
INFO: Updating manifest file /Users/stefan/projects/julia/Manifest.toml
INFO:  [682c06a0] ↑ JSON v0.10.0 ⇒ v0.13.0

Package operations create a Project.toml file that record what dependencies your project (or named global environment) has – i.e. what you've explicitly added. It also creates a Manifest.toml file that records the exact versions of each of those dependenices and their transitive dependencies – and the graph between them. You can load top-level dependencies via the usual using JSON or import JSON constructs in the REPL or in Julia scripts.