Behavior of no-arg activate with julia --project changed with julia v1.6

[stemann]

Did the behavior of no-arg Pkg.activate() change with Julia v1.6, such that it activates the default env.?

In other words - does the docs need updating, cf. https://pkgdocs.julialang.org/v1/api/#Pkg.activate ?

On Julia v1.5, julia --project --eval 'using Pkg; Pkg.activate(), the local project is activated:

$ docker run -it --rm julia:1.5 bash -c "julia --eval 'using InteractiveUtils; versioninfo(); using Pkg; Pkg.activate(); Pkg.generate(\"Foo\")'; cd Foo; julia --project --eval 'using Pkg; Pkg.activate(); Pkg.activate(\".\")'"
Julia Version 1.5.4
Commit 69fcb5745b (2021-03-11 19:13 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-9.0.1 (ORCJIT, skylake)
Environment:
  JULIA_GPG = 3673DF529D9049477F76B37566E3C7DC03D6E495
  JULIA_VERSION = 1.5.4
  JULIA_PATH = /usr/local/julia
 Activating environment at `~/.julia/environments/v1.5/Project.toml`
 Generating  project Foo:
    Foo/Project.toml
    Foo/src/Foo.jl
 Activating environment at `/Foo/Project.toml`
 Activating environment at `/Foo/Project.toml`

On Julia v1.6-v1.7, julia --project --eval 'using Pkg; Pkg.activate(), activates the default env.:
v1.6

$ docker run -it --rm julia:1.6 bash -c "julia --eval 'using InteractiveUtils; versioninfo(); using Pkg; Pkg.activate(); Pkg.generate(\"Foo\")'; cd Foo; julia --project --eval 'using Pkg; Pkg.activate(); Pkg.activate(\".\")'"
Julia Version 1.6.6
Commit b8708f954a (2022-03-28 07:17 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-11.0.1 (ORCJIT, skylake)
Environment:
  JULIA_GPG = 3673DF529D9049477F76B37566E3C7DC03D6E495
  JULIA_VERSION = 1.6.6
  JULIA_PATH = /usr/local/julia
  Activating environment at `~/.julia/environments/v1.6/Project.toml`
  Generating  project Foo:
    Foo/Project.toml
    Foo/src/Foo.jl
  Activating environment at `~/.julia/environments/v1.6/Project.toml`
  Activating environment at `/Foo/Project.toml`

v1.7

$ docker run -it --rm julia:1.7 bash -c "julia --eval 'using InteractiveUtils; versioninfo(); using Pkg; Pkg.activate(); Pkg.generate(\"Foo\")'; cd Foo; julia --project --eval 'using Pkg; Pkg.activate(); Pkg.activate(\".\")'"
Julia Version 1.7.2
Commit bf53498635 (2022-02-06 15:21 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-12.0.1 (ORCJIT, skylake)
Environment:
  JULIA_GPG = 3673DF529D9049477F76B37566E3C7DC03D6E495
  JULIA_VERSION = 1.7.2
  JULIA_PATH = /usr/local/julia
  Activating project at `~/.julia/environments/v1.7`
  Generating  project Foo:
    Foo/Project.toml
    Foo/src/Foo.jl
  Activating project at `~/.julia/environments/v1.7`
  Activating project at `/Foo`

[KristofferC]

My guess is this got changed based on JuliaLang/julia#36434. If the docs are out of date, then they do need updating, indeed.