feat: allow periods in dataset names

Project.toml

@@ -1,7 +1,7 @@
 name = "DataSets"
 uuid = "c9661210-8a83-48f0-b833-72e62abce419"
 authors = ["Chris Foster <[email protected]> and contributors"]
-version = "0.2.11"
+version = "0.2.12"
 
 [deps]
 AbstractTrees = "1520ce14-60c1-5f80-bbc7-55ef81b5835c"

src/DataSets.jl

@@ -87,27 +87,49 @@ end
 Check whether a dataset name is valid.
 
 Valid names must start with a letter or a number, the rest of the name can also contain `-`
-and `_` characters. The names can also be hieracicial, with segments separated by forward
-slashes (`/`). Each segment must also start with either a letter or a number. For example:
+and `_` characters. The names can also be hierarchical, with segments separated by forward
+slashes (`/`) or (`.`). Each segment must also start with either a letter or a number.
+
+For example, the following dataset names are valid:
 
     my_data
     my_data_1
     username/data
     organization_name/project-name/data
     123user/456dataset--name
+    username/my_table.csv
+    dataset/v0.1.2
+
+whereas names like this are invalid:
+
+    __mydata__
+    username/.git
+    my...dataset
+
+!!! note "Segment separators"
+
+    In dataset names, both `/` and `.` are considered segment separators from a syntax
+    perspective. While DataSets.jl does not impose any specific interpretation on the
+    dataset name, it is recommended to use `/` to separate segments from a semantic
+    perspective, and to interpret each forward-slash-separated segment as a path separator.
+    Periods would conventionally be used to separate file extensions within a segment.
+
+    E.g. use `username/my-project-data/population.csv`, rather than
+    `username.my-project-data.population.csv` or something like that.
 """
 function check_dataset_name(name::AbstractString)
     if !occursin(DATASET_NAME_REGEX, name)
-        error("DataSet name \"$name\" is invalid. DataSet names must start with a letter and can contain only letters, numbers, `-`, `_` or `/`.")
+        error("DataSet name \"$name\" is invalid. DataSet names must start with a letter or a number, and can contain only letters, numbers, `-` and `_`, or `/` and `.` as segment separators.")
     end
 end
 # DataSet names disallow most punctuation for now, as it may be needed as
 # delimiters in data-related syntax (eg, for the data REPL).
 const DATASET_NAME_REGEX_STRING = raw"""
 [[:alnum:]]
 (?:
-    [-[:alnum:]_]     |
-    / (?=[[:alnum:]])
+    [-[:alnum:]_]      |
+    \.(?=[[:alnum:]])  |
+    \/ (?=[[:alnum:]])
 )*
 """
 const DATASET_NAME_REGEX = Regex("^\n$(DATASET_NAME_REGEX_STRING)\n\$", "x")

test/runtests.jl

@@ -98,21 +98,55 @@ end
 end
 
 #-------------------------------------------------------------------------------
+function load_list(filename)
+    lines = eachline(joinpath(@__DIR__, filename))
+    filter(!isempty, strip.(lines))
+end
 @testset "Data set name parsing" begin
-    @testset "Valid name: $name" for name in (
-        "a_b", "a-b", "a1", "δεδομένα", "a/b", "a/b/c", "a-", "b_",
-        "1", "a/1", "123", "12ab/34cd", "1/2/3", "1-2-3", "x_-__", "a---",
-    )
-        @test DataSets.check_dataset_name(name) === nothing
-        @test DataSets._split_dataspec(name) == (name, nothing, nothing)
+    @testset "Valid names" begin
+        valid_names = load_list("testnames-valid.txt")
+        @test !isempty(valid_names)
+        @testset "Valid name: $name" for name in valid_names
+            @test DataSets.check_dataset_name(name) === nothing
+            @test DataSets._split_dataspec(name) == (name, nothing, nothing)
+            # Also test that the name is still valid when it appears as part of
+            # a path elements.
+            let path_name = "foo/$(name)"
+                @test DataSets.check_dataset_name(path_name) === nothing
+                @test DataSets._split_dataspec(path_name) == (path_name, nothing, nothing)
+            end
+            let path_name = "$(name)/foo"
+                @test DataSets.check_dataset_name(path_name) === nothing
+                @test DataSets._split_dataspec(path_name) == (path_name, nothing, nothing)
+            end
+            let path_name = "foo/$(name)/bar"
+                @test DataSets.check_dataset_name(path_name) === nothing
+                @test DataSets._split_dataspec(path_name) == (path_name, nothing, nothing)
+            end
+        end
     end
 
-    @testset "Invalid name: $name" for name in (
-        "a b", "a.b", "a/b/", "a//b", "/a/b", "a/-", "a/ _/b",
-        "a/-a", "a/-1",
-    )
-        @test_throws ErrorException DataSets.check_dataset_name(name)
-        @test DataSets._split_dataspec(name) == (nothing, nothing, nothing)
+    @testset "Invalid names" begin
+        invalid_names = load_list("testnames-invalid.txt")
+        @test !isempty(invalid_names)
+        @testset "Invalid name: $name" for name in invalid_names
+            @test_throws ErrorException DataSets.check_dataset_name(name)
+            @test DataSets._split_dataspec(name) == (nothing, nothing, nothing)
+            # Also test that the name is still invalid when it appears as part of
+            # a path elements.
+            let path_name = "foo/$(name)"
+                @test_throws ErrorException DataSets.check_dataset_name(path_name) === nothing
+                @test DataSets._split_dataspec(path_name) == (nothing, nothing, nothing)
+            end
+            let path_name = "$(name)/foo"
+                @test_throws ErrorException DataSets.check_dataset_name(path_name) === nothing
+                @test DataSets._split_dataspec(path_name) == (nothing, nothing, nothing)
+            end
+            let path_name = "foo/$(name)/bar"
+                @test_throws ErrorException DataSets.check_dataset_name(path_name) === nothing
+                @test DataSets._split_dataspec(path_name) == (nothing, nothing, nothing)
+            end
+        end
     end
 end
 

test/testnames-invalid.txt

@@ -0,0 +1,25 @@
+a b
+a/b/
+a//b
+/a/b
+a/-
+a/ _/b
+a/-a
+a/-1
+.a
+..a
+a.
+a..
+.a.
+a..b
+.abc
+abc.
+abc/.def
+abc/def.
+a./b
+a.-
+_._
+a._b
+a.-b
+./a
+b/../a

test/testnames-valid.txt

@@ -0,0 +1,24 @@
+a_b
+a-b
+a1
+δεδομένα
+a/b
+a/b/c
+a-
+b_
+1
+a/1
+123
+12ab/34cd
+1/2/3
+1-2-3
+x_-__
+a---
+a.b
+a.b
+abc.def
+abc/def.ghi
+abc-def.ghi_jkl
+a.b.c
+a_.c
+foo__-.csv