Try #297:

CHANGELOG.md

@@ -8,6 +8,8 @@
 
 - v0.11.0: The `s3_exists` and `isdir(::S3Path)` calls no longer encounter HTTP 403 (Access Denied) errors when attempting to list resources which requiring an `s3:prefix` to be specified ([#289]).
 - v0.11.1: The new keyword argument `returns` for `Base.write(fp::S3Path, ...)` determines the output returned from `write`, which can now be the raw `AWS.Response` (`returns=:response`) or the `S3Path` (`returns=:path`); this latter option returns an `S3Path` populated with the version ID of the written object (when versioning is enabled on the bucket) ([#293]).
+- v0.11.2: New constructor for unversioned `S3Path` and version: `S3Path(path::S3Path; version=...)` ([#297]).
 
 [#289]: https://github.com/JuliaCloud/AWSS3.jl/pull/289
 [#293]: https://github.com/JuliaCloud/AWSS3.jl/pull/293
+[#297]: https://github.com/JuliaCloud/AWSS3.jl/pull/297

Project.toml

@@ -1,6 +1,6 @@
 name = "AWSS3"
 uuid = "1c724243-ef5b-51ab-93f4-b0a88ac62a95"
-version = "0.11.1"
+version = "0.11.2"
 
 [deps]
 AWS = "fbe9abb3-538b-5e4e-ba9e-bc94f4f92ebc"

src/s3path.jl

@@ -46,6 +46,7 @@ end
 
 """
     S3Path()
+    S3Path(path::S3Path; version::$(AbstractS3Version))
     S3Path(str; version::$(AbstractS3Version)=nothing, config::$(AbstractS3PathConfig)=nothing)
 
 Construct a new AWS S3 path type which should be of the form
@@ -107,6 +108,17 @@ function S3Path(
     )
 end
 
+function S3Path(path::S3Path; version::AbstractS3Version)
+    if !isnothing(path.version)
+        throw(
+            ArgumentError(
+                "Can't construct versioned path, input already specifies version: $path"
+            ),
+        )
+    end
+    return S3Path(path.bucket, path.key; path.isdirectory, path.config, version)
+end
+
 # To avoid a breaking change.
 function S3Path(
     str::AbstractString;

test/s3path.jl

@@ -636,6 +636,23 @@ function s3path_tests(base_config)
         @test_throws ArgumentError S3Path("s3://my_bucket/"; version="")
     end
 
+    @testset "construct versioned s3path from unversioned s3path" begin
+        # Use custom config to test that config is preserved in construction
+        config = AWSConfig(; region="bogus")
+        ver = String('A':'Z') * String('0':'5')
+
+        unversioned = S3Path("s3://my_bucket/prefix"; config)
+        @test unversioned.version === nothing
+
+        versioned = S3Path(unversioned; version=ver)
+        @test versioned.version == ver
+        @test versioned == S3Path("s3://my_bucket/prefix"; version=ver)
+        @test versioned.config == unversioned.config == config
+
+        # If input path already has a version, fail---even if the versions are the same
+        @test_throws ArgumentError S3Path(versioned; version=ver)
+    end
+
     # `s3_list_versions` gives `SignatureDoesNotMatch` exceptions on Minio
     if is_aws(base_config)
         @testset "S3Path versioning" begin