Mark ProjectManifestSnapshot, take_project_manifest_snapshot as public API

Author: fonsp

Project.toml

@@ -2,7 +2,7 @@ name = "GracefulPkg"
 uuid = "828d9ff0-206c-6161-646e-6576656f7244"
 license = "MIT"
 authors = ["Fons van der Plas <[email protected]>"]
-version = "2.2.2"
+version = "2.3.0"
 
 [deps]
 Compat = "34da2185-b29b-5c13-b0c7-acf172513d20"

src/project manifest snapshot.jl

@@ -1,12 +1,23 @@
+using Compat
+
+@compat public ProjectManifestSnapshot, take_project_manifest_snapshot
 
 """
-The contents of the Project.toml and Manifest.toml files at the time of recording.
+The contents of the Project.toml and Manifest.toml files at the time of recording. `nothing` if a file does not exist.
 """
 Base.@kwdef struct ProjectManifestSnapshot
     project::Union{Nothing,String} = nothing
     manifest::Union{Nothing,String} = nothing
 end
 
+
+"""
+```julia
+take_project_manifest_snapshot(env_dir::String)::ProjectManifestSnapshot
+```
+
+Take a snapshot of the Project.toml and Manifest.toml files in the given environment directory. Returns a [`ProjectManifestSnapshot`](@ref) object.
+"""
 function take_project_manifest_snapshot(env_dir::String)
     p = joinpath(env_dir, "Project.toml")
     m = joinpath(env_dir, "Manifest.toml")