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Allow access to the artifact path in a relocatable way #32

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Allow access to the artifact path in a relocatable way #32

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f582dd5
add artifact_dir()
lcontento Oct 29, 2024
2c2cbab
Add deprecation
lcontento Nov 4, 2024
b62184d
improve @deprecate_binding
lcontento Nov 4, 2024
fb2f095
add comments + precompile statement
lcontento Nov 4, 2024
924cf92
Update src/TZJData.jl
lcontento Nov 4, 2024
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14 changes: 13 additions & 1 deletion src/TZJData.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,13 @@ module TZJData

using Artifacts

const ARTIFACT_DIR = artifact"tzjdata"
artifact_dir() = artifact"tzjdata"
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Base.@deprecate_binding ARTIFACT_DIR artifact_dir() false
# Why not simply use `const ARTIFACT_DIR = artifact"tzjdata"`?
# The problem is that `ARTIFACT_DIR` would be set to the artifact path at the time of precompilation.
# If the Julia depot is afterwards relocated,
# `ARTIFACT_DIR` will continue to point to the old no-longer-valid location.
# This occurs for example if TimeZones.jl is included inside a system image.

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const TZDATA_VERSION = let
artifact_dict = Artifacts.parse_toml(joinpath(@__DIR__, "..", "Artifacts.toml"))
Expand All @@ -11,4 +17,10 @@ const TZDATA_VERSION = let
m !== nothing ? m[:version] : error("Unable to determine tzdata version")
end

precompile(artifact_dir, ())
# `@deprecate_binding ARTIFACT_DIR artifact_dir()`
# will have already precompiled `artifact_dir()`
# but once the deprecated binding is removed
# an explicit precompile statement will be necessary.

end
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