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Add Base.get_extension to docs/API #50860

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merged 1 commit into from
Aug 10, 2023

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SBuercklin
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I am interested in whether Base.get_extension can be cemented as part of the API of Julia. The documentation of Pkg.jl is instructing developers to rely on the existence of this function, and there doesn't seem to be any alternative which is a part of the API that developers can use instead on to guarantee forward compatibility for the same behavior.

Base.get_extension is referred to explicitly in the Pkg.jl docs to conditionally use package extensions vs Requires.jl.

The Pkg.jl docs suggest

if !isdefined(Base, :get_extension)
  include("../ext/PlottingContourExt.jl")
end

to transition from "normal dependency to extension," which will break and automatically load the extension in future versions should Base.get_extension go away.

Base.get_extension is the only way (that I know of) to directly access the module associated with a package extension, which can be a useful utility as well.

@brenhinkeller brenhinkeller added the docs This change adds or pertains to documentation label Aug 9, 2023
@KristofferC KristofferC added backport 1.9 Change should be backported to release-1.9 backport 1.10 Change should be backported to the 1.10 release labels Aug 10, 2023
@KristofferC KristofferC merged commit d1759bc into JuliaLang:master Aug 10, 2023
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Thanks, it was indeed an oversight that this was not added to the manual.

KristofferC pushed a commit that referenced this pull request Aug 10, 2023
The documentation of `Pkg.jl` is instructing
developers to rely on the existence of this function, and there doesn't
seem to be any alternative which is a part of the API that developers
can use instead on to guarantee forward compatibility for the same
behavior.

`Base.get_extension` is [referred to
explicitly](https://pkgdocs.julialang.org/v1.9/creating-packages/#Backwards-compatibility)
in the `Pkg.jl` docs to conditionally use package extensions vs
`Requires.jl`.

The `Pkg.jl` docs suggest
```julia
if !isdefined(Base, :get_extension)
  include("../ext/PlottingContourExt.jl")
end
```
to transition from "normal dependency to extension," which will break
and automatically load the extension in future versions should
`Base.get_extension` go away.

`Base.get_extension` is the only way (that I know of) to directly access
the module associated with a package extension, which can be a useful
utility as well.

(cherry picked from commit d1759bc)
@KristofferC KristofferC mentioned this pull request Aug 10, 2023
35 tasks
KristofferC pushed a commit that referenced this pull request Aug 10, 2023
The documentation of `Pkg.jl` is instructing
developers to rely on the existence of this function, and there doesn't
seem to be any alternative which is a part of the API that developers
can use instead on to guarantee forward compatibility for the same
behavior.

`Base.get_extension` is [referred to
explicitly](https://pkgdocs.julialang.org/v1.9/creating-packages/#Backwards-compatibility)
in the `Pkg.jl` docs to conditionally use package extensions vs
`Requires.jl`.

The `Pkg.jl` docs suggest
```julia
if !isdefined(Base, :get_extension)
  include("../ext/PlottingContourExt.jl")
end
```
to transition from "normal dependency to extension," which will break
and automatically load the extension in future versions should
`Base.get_extension` go away.

`Base.get_extension` is the only way (that I know of) to directly access
the module associated with a package extension, which can be a useful
utility as well.

(cherry picked from commit d1759bc)
KristofferC added a commit that referenced this pull request Aug 18, 2023
Backported PRs:
- [x] #47782 <!-- Generalize Bool parse method to AbstractString -->
- [x] #48634 <!-- Remove unused "deps" mechanism in internal sorting
keywords [NFC] -->
- [x] #49931 <!-- Lock finalizers' lists at exit -->
- [x] #50064 <!-- Fix numbered prompt with input only with comment -->
- [x] #50474 <!-- docs: Fix a `!!! note` which was miscapitalized -->
- [x] #50516 <!-- Fix visibility of assert on GCC12/13 -->
- [x] #50635 <!-- `versioninfo()`: include build info and unofficial
warning -->
- [x] #49915 <!-- Revert "Remove number / vector (#44358)" -->
- [x] #50781 <!-- fix `bit_map!` with aliasing -->
- [x] #50845 <!-- fix #50438, use default pool for at-threads -->
- [x] #49031 <!-- Update inference.md -->
- [x] #50289 <!-- Initialize prev_nold and nold in gc_reset_page -->
- [x] #50559 <!-- Expand kwcall lowering positional default check to
vararg -->
- [x] #49582 <!-- Update HISTORY.md for `DelimitedFiles` -->
- [x] #50341 <!-- invokelatest docs should say not exported before 1.9
-->
- [x] #50525 <!-- only check that values are finite in `generic_lufact`
when `check=true` -->
- [x] #50444 <!-- Optimize getfield lowering to avoid boxing in some
cases -->
- [x] #50523 <!-- Avoid generic call in most cases for getproperty -->
- [x] #50860 <!-- Add `Base.get_extension` to docs/API -->
- [x] #50164 <!-- codegen: handle dead code with unsafe_store of FCA
pointers -->
- [x] #50568 <!-- `Array(::AbstractRange)` should return an `Array` -->
- [x] #50871 <!-- macOS: Don't inspect dead threadtls during exception
handling. -->

Need manual backport:
- [ ] #48542 <!-- Add docs on task-specific buffering using
multithreading -->
- [ ] #50591 <!-- build: fix various makefile bugs -->


Non-merged PRs with backport label:
- [ ] #50842 <!-- Avoid race conditions with recursive rm -->
- [ ] #50823 <!-- Make ranges more robust with unsigned indexes. -->
- [ ] #50663 <!-- Fix Expr(:loopinfo) codegen -->
- [ ] #49716 <!-- Update varinfo() docstring signature -->
- [ ] #49713 <!-- prevent REPL from erroring in numbered mode in some
situations -->
- [ ] #49573 <!-- Implement jl_cpu_pause on PPC64 -->
- [ ] #48726 <!-- fix macro expansion of property destructuring -->
- [ ] #48642 <!-- Use gc alloc instead of alloc typed in lowering -->
- [ ] #48183 <!-- Don't use pkgimage for package if any includes fall in
tracked path for coverage or alloc tracking -->
- [ ] #48050 <!-- improve `--heap-size-hint` arg handling -->
- [ ] #47615 <!-- Allow threadsafe access to buffer of type inference
profiling trees -->
@KristofferC KristofferC removed the backport 1.9 Change should be backported to release-1.9 label Aug 18, 2023
KristofferC added a commit that referenced this pull request Oct 2, 2023
Backported PRs:
- [x] #48625 <!-- add replace(io, str, patterns...) -->
- [x] #48387 <!-- Improve documentation of sort-related functions -->
- [x] #48363 <!-- Revise sort.md and docstrings in sort.jl -->
- [x] #48977 <!-- Update SparseArrays.jl stdlib for SuiteSparse 7 -->
- [x] #50719 <!-- fix `CyclePadding(::DataType)` -->
- [x] #50694 <!-- inference: permit recursive type traits -->
- [x] #50860 <!-- Add `Base.get_extension` to docs/API -->
- [x] #50594 <!-- Disallow non-index Integer types in isassigned -->
- [x] #50802 <!-- Makes IntrusiveLinkedListSynchronized mutable to avoid
allocation on poptask -->
- [x] #50858 <!-- Add a `threadpool` parameter to `Channel` constructor
-->
- [x] #50874 <!-- Restrict COFF to a single thread when symbol count is
high -->
- [x] #50822 <!-- Add default method for setmodifiers! -->
- [x] #50730 <!-- Fix integer overflow in `isapprox` -->
- [x] #50850 <!-- Remove weird Rational dispatch and add pi functions to
list -->
- [x] #50809 <!-- Limit type-printing in MethodError -->
- [x] #50915 <!-- Add note the `Task` about sticky bit -->
- [x] #50929 <!-- when widening tuple types in tmerge, only widen the
complex parts -->
- [x] #50928 <!-- Bump JuliaSyntax to 0.4.6 -->
- [x] #50959 <!-- Update libssh2 patches -->
- [x] #50823 <!-- Make ranges more robust with unsigned indexes. -->
- [x] #48542 <!-- Add docs on task-specific buffering using
multithreading -->
- [x] #50912 <!-- Separate foreign threads into a :foreign threadpool
-->
- [x] #51010 <!-- Add ORIGIN to SuiteSparse rpath on Linux/FreeBSD -->
- [x] #50753 <!-- cat: remove unused promote_eltype methods that confuse
inference -->
- [x] #51027 <!-- Implement realloc accounting correctly -->
- [x] #51019 <!-- fix a case of potentially use of undefined variable
when handling error in distributed message processing -->
- [x] #51039 <!-- Revert "Optimize findall(f, ::AbstractArray{Bool})
(#42202)" -->
- [x] #51036 <!-- add missing invoke edge for nospecialize targets -->
- [x] #51042 <!-- inference: fix return_type_tfunc modeling of concrete
functions -->
- [x] #51114 <!-- Workaround upstream FreeBSD issue #272992 -->
- [x] #50892 <!-- Add `JL_DLLIMPORT` to `small_typeof` declaration -->
- [x] #51154 <!-- broadcast: use recursion rather than ntuple to map
over a tuple -->
- [x] #51153 <!-- fix debug typo in "add missing invoke edge for
nospecialize targets (#51036)" -->
- [x] #51222 <!-- Check again if the tty is open inside the IO lock -->
- [x] #51236 <!-- Add lock around uv_unref during init -->
- [x] #51243 <!-- GMP: Gracefully handle more overflows. -->
- [x] #51254 <!-- Ryu: make sure adding zeros does not overwrite
trailing dot -->
- [x] #51175 <!-- shorten stale_age for cachefile lock -->
- [x] #51300 <!-- fix method definition error for bad vararg -->
- [x] #51307 <!-- fix force-throw ctrl-C on Windows -->
- [x] #51303 <!-- ensure revising structs is safe -->
- [x] #51393 
- [x] #51403 

Need manual backport:
- [x] #51009 <!-- fix #50562, regression in `in` of tuple of Symbols -->
- [x] #51053 <!-- Bump Statistics stdlib -->
- [x] #51013 <!-- fix #50709, type bound error due to free typevar in
sparam env -->
- [x] #51305 <!-- reduce test time for rounding and floatfuncs -->

Contains multiple commits, manual intervention needed:
- [ ] #50663 <!-- Fix Expr(:loopinfo) codegen -->
- [ ] #51035 <!-- refactor GC scanning code to reflect jl_binding_t are
now first class -->
- [ ] #51092 <!-- inference: fix bad effects for recursion -->
- [x] #51247 <!-- Check if malloc has succeeded before incrementing gc
stats -->
- [x] #51294 <!-- use LibGit2_jll for LibGit2 library -->

Non-merged PRs with backport label:
- [ ] #51132 <!-- Handle `AbstractQ` in concatenation -->
- [x] #51029 <!-- testdefs: make sure that if a test set changes the
active project, they change it back when they're done -->
- [ ] #50919 <!-- Code loading: do the "skipping mtime check for stdlib"
check regardless of the value of `ispath(f)` -->
- [ ] #50824 <!-- Add some aliasing warnings to docstrings for mutating
functions -->
- [x] #50385 <!-- Precompile pidlocks: add to NEWS and docs -->
- [ ] #49805 <!-- Limit TimeType subtraction to AbstractDateTime -->
@KristofferC KristofferC removed the backport 1.10 Change should be backported to the 1.10 release label Oct 2, 2023
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