-
Notifications
You must be signed in to change notification settings - Fork 480
/
Expanders.jl
717 lines (633 loc) · 24.3 KB
/
Expanders.jl
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
"""
Defines node "expanders" that transform nodes from the parsed markdown files.
"""
module Expanders
import ..Documenter:
Anchors,
Builder,
Documents,
Documenter,
Utilities
import .Documents:
MethodNode,
DocsNode,
DocsNodes,
EvalNode,
MetaNode
import .Utilities: Selectors
import Markdown, REPL
import Base64: stringmime
function expand(doc::Documents.Document)
for (src, page) in doc.internal.pages
empty!(page.globals.meta)
for element in page.elements
Selectors.dispatch(ExpanderPipeline, element, page, doc)
end
pagecheck(page)
end
end
# run some checks after expanding the page
function pagecheck(page)
# make sure there is no "continued code" lingering around
if haskey(page.globals.meta, :ContinuedCode) && !isempty(page.globals.meta[:ContinuedCode])
@warn "code from a continued @example block unused in $(Utilities.locrepr(page.source))."
end
end
# Expander Pipeline.
# ------------------
"""
The default node expander "pipeline", which consists of the following expanders:
- [`TrackHeaders`](@ref)
- [`MetaBlocks`](@ref)
- [`DocsBlocks`](@ref)
- [`AutoDocsBlocks`](@ref)
- [`EvalBlocks`](@ref)
- [`IndexBlocks`](@ref)
- [`ContentsBlocks`](@ref)
- [`ExampleBlocks`](@ref)
- [`SetupBlocks`](@ref)
- [`REPLBlocks`](@ref)
"""
abstract type ExpanderPipeline <: Selectors.AbstractSelector end
"""
Tracks all `Markdown.Header` nodes found in the parsed markdown files and stores an
[`Anchors.Anchor`](@ref) object for each one.
"""
abstract type TrackHeaders <: ExpanderPipeline end
"""
Parses each code block where the language is `@meta` and evaluates the key/value pairs found
within the block, i.e.
````markdown
```@meta
CurrentModule = Documenter
DocTestSetup = quote
using Documenter
end
```
````
"""
abstract type MetaBlocks <: ExpanderPipeline end
"""
Parses each code block where the language is `@docs` and evaluates the expressions found
within the block. Replaces the block with the docstrings associated with each expression.
````markdown
```@docs
Documenter
makedocs
deploydocs
```
````
"""
abstract type DocsBlocks <: ExpanderPipeline end
"""
Parses each code block where the language is `@autodocs` and replaces it with all the
docstrings that match the provided key/value pairs `Modules = ...` and `Order = ...`.
````markdown
```@autodocs
Modules = [Foo, Bar]
Order = [:function, :type]
```
````
"""
abstract type AutoDocsBlocks <: ExpanderPipeline end
"""
Parses each code block where the language is `@eval` and evaluates it's content. Replaces
the block with the value resulting from the evaluation. This can be useful for inserting
generated content into a document such as plots.
````markdown
```@eval
using PyPlot
x = linspace(-π, π)
y = sin(x)
plot(x, y, color = "red")
savefig("plot.svg")
Markdown.parse("![Plot](plot.svg)")
```
````
"""
abstract type EvalBlocks <: ExpanderPipeline end
abstract type RawBlocks <: ExpanderPipeline end
"""
Parses each code block where the language is `@index` and replaces it with an index of all
docstrings spliced into the document. The pages that are included can be set using a
key/value pair `Pages = [...]` such as
````markdown
```@index
Pages = ["foo.md", "bar.md"]
```
````
"""
abstract type IndexBlocks <: ExpanderPipeline end
"""
Parses each code block where the language is `@contents` and replaces it with a nested list
of all `Header` nodes in the generated document. The pages and depth of the list can be set
using `Pages = [...]` and `Depth = N` where `N` is and integer.
````markdown
```@contents
Pages = ["foo.md", "bar.md"]
Depth = 1
```
````
The default `Depth` value is `2`.
"""
abstract type ContentsBlocks <: ExpanderPipeline end
"""
Parses each code block where the language is `@example` and evaluates the parsed Julia code
found within. The resulting value is then inserted into the final document after the source
code.
````markdown
```@example
a = 1
b = 2
a + b
```
````
"""
abstract type ExampleBlocks <: ExpanderPipeline end
"""
Similar to the [`ExampleBlocks`](@ref) expander, but inserts a Julia REPL prompt before each
toplevel expression in the final document.
"""
abstract type REPLBlocks <: ExpanderPipeline end
"""
Similar to the [`ExampleBlocks`](@ref) expander, but hides all output in the final document.
"""
abstract type SetupBlocks <: ExpanderPipeline end
Selectors.order(::Type{TrackHeaders}) = 1.0
Selectors.order(::Type{MetaBlocks}) = 2.0
Selectors.order(::Type{DocsBlocks}) = 3.0
Selectors.order(::Type{AutoDocsBlocks}) = 4.0
Selectors.order(::Type{EvalBlocks}) = 5.0
Selectors.order(::Type{IndexBlocks}) = 6.0
Selectors.order(::Type{ContentsBlocks}) = 7.0
Selectors.order(::Type{ExampleBlocks}) = 8.0
Selectors.order(::Type{REPLBlocks}) = 9.0
Selectors.order(::Type{SetupBlocks}) = 10.0
Selectors.order(::Type{RawBlocks}) = 11.0
Selectors.matcher(::Type{TrackHeaders}, node, page, doc) = isa(node, Markdown.Header)
Selectors.matcher(::Type{MetaBlocks}, node, page, doc) = iscode(node, "@meta")
Selectors.matcher(::Type{DocsBlocks}, node, page, doc) = iscode(node, "@docs")
Selectors.matcher(::Type{AutoDocsBlocks}, node, page, doc) = iscode(node, "@autodocs")
Selectors.matcher(::Type{EvalBlocks}, node, page, doc) = iscode(node, "@eval")
Selectors.matcher(::Type{IndexBlocks}, node, page, doc) = iscode(node, "@index")
Selectors.matcher(::Type{ContentsBlocks}, node, page, doc) = iscode(node, "@contents")
Selectors.matcher(::Type{ExampleBlocks}, node, page, doc) = iscode(node, r"^@example")
Selectors.matcher(::Type{REPLBlocks}, node, page, doc) = iscode(node, r"^@repl")
Selectors.matcher(::Type{SetupBlocks}, node, page, doc) = iscode(node, r"^@setup")
Selectors.matcher(::Type{RawBlocks}, node, page, doc) = iscode(node, r"^@raw")
# Default Expander.
Selectors.runner(::Type{ExpanderPipeline}, x, page, doc) = page.mapping[x] = x
# Track Headers.
# --------------
function Selectors.runner(::Type{TrackHeaders}, header, page, doc)
# Get the header slug.
text =
if namedheader(header)
url = header.text[1].url
header.text = header.text[1].text
match(NAMEDHEADER_REGEX, url)[1]
else
sprint(Markdown.plain, Markdown.Paragraph(header.text))
end
slug = Utilities.slugify(text)
# Add the header to the document's header map.
anchor = Anchors.add!(doc.internal.headers, header, slug, page.build)
# Map the header element to the generated anchor and the current anchor count.
page.mapping[header] = anchor
end
# @meta
# -----
function Selectors.runner(::Type{MetaBlocks}, x, page, doc)
meta = page.globals.meta
lines = Utilities.find_block_in_file(x.code, page.source)
for (ex, str) in Utilities.parseblock(x.code, doc, page)
if Utilities.isassign(ex)
try
meta[ex.args[1]] = Core.eval(Main, ex.args[2])
catch err
push!(doc.internal.errors, :meta_block)
@warn("""
failed to evaluate `$(strip(str))` in `@meta` block in $(Utilities.locrepr(page.source, lines))
```$(x.language)
$(x.code)
```
""", exception = err)
end
end
end
page.mapping[x] = MetaNode(copy(meta))
end
# @docs
# -----
function Selectors.runner(::Type{DocsBlocks}, x, page, doc)
nodes = Union{DocsNode,Markdown.Admonition}[]
curmod = get(page.globals.meta, :CurrentModule, Main)
lines = Utilities.find_block_in_file(x.code, page.source)
for (ex, str) in Utilities.parseblock(x.code, doc, page)
admonition = Markdown.Admonition("warning", "Missing docstring.",
Utilities.mdparse("Missing docstring for `$(strip(str))`. Check Documenter's build log for details.", mode=:blocks))
binding = try
Documenter.DocSystem.binding(curmod, ex)
catch err
push!(doc.internal.errors, :docs_block)
@warn("""
unable to get the binding for '$(strip(str))' in `@docs` block in $(Utilities.locrepr(page.source, lines)) from expression '$(repr(ex))' in module $(curmod)
```$(x.language)
$(x.code)
```
""",
exception = err)
push!(nodes, admonition)
continue
end
# Undefined `Bindings` get discarded.
if !Documenter.DocSystem.iskeyword(binding) && !Documenter.DocSystem.defined(binding)
push!(doc.internal.errors, :docs_block)
@warn("""
undefined binding '$(binding)' in `@docs` block in $(Utilities.locrepr(page.source, lines))
```$(x.language)
$(x.code)
```
""")
push!(nodes, admonition)
continue
end
typesig = Core.eval(curmod, Documenter.DocSystem.signature(ex, str))
object = Utilities.Object(binding, typesig)
# We can't include the same object more than once in a document.
if haskey(doc.internal.objects, object)
push!(doc.internal.errors, :docs_block)
@warn("""
duplicate docs found for '$(strip(str))' in `@docs` block in $(Utilities.locrepr(page.source, lines))
```$(x.language)
$(x.code)
```
""")
push!(nodes, admonition)
continue
end
# Find the docs matching `binding` and `typesig`. Only search within the provided modules.
docs = Documenter.DocSystem.getdocs(binding, typesig; modules = doc.user.modules)
# Include only docstrings from user-provided modules if provided.
if !isempty(doc.user.modules)
filter!(d -> d.data[:module] in doc.user.modules, docs)
end
# Check that we aren't printing an empty docs list. Skip block when empty.
if isempty(docs)
push!(doc.internal.errors, :docs_block)
@warn("""
no docs found for '$(strip(str))' in `@docs` block in $(Utilities.locrepr(page.source, lines))
```$(x.language)
$(x.code)
```
""")
push!(nodes, admonition)
continue
end
# Concatenate found docstrings into a single `MD` object.
docstr = Markdown.MD(map(Documenter.DocSystem.parsedoc, docs))
docstr.meta[:results] = docs
# If the first element of the docstring is a code block, make it Julia by default.
doc.user.highlightsig && highlightsig!(docstr)
# Generate a unique name to be used in anchors and links for the docstring.
slug = Utilities.slugify(object)
anchor = Anchors.add!(doc.internal.docs, object, slug, page.build)
docsnode = DocsNode(docstr, anchor, object, page)
# Track the order of insertion of objects per-binding.
push!(get!(doc.internal.bindings, binding, Utilities.Object[]), object)
doc.internal.objects[object] = docsnode
push!(nodes, docsnode)
end
page.mapping[x] = DocsNodes(nodes)
end
# @autodocs
# ---------
const AUTODOCS_DEFAULT_ORDER = [:module, :constant, :type, :function, :macro]
function Selectors.runner(::Type{AutoDocsBlocks}, x, page, doc)
curmod = get(page.globals.meta, :CurrentModule, Main)
fields = Dict{Symbol, Any}()
lines = Utilities.find_block_in_file(x.code, page.source)
for (ex, str) in Utilities.parseblock(x.code, doc, page)
if Utilities.isassign(ex)
try
if ex.args[1] == :Filter
fields[ex.args[1]] = Core.eval(Main, ex.args[2])
else
fields[ex.args[1]] = Core.eval(curmod, ex.args[2])
end
catch err
push!(doc.internal.errors, :autodocs_block)
@warn("""
failed to evaluate `$(strip(str))` in `@autodocs` block in $(Utilities.locrepr(page.source, lines))
```$(x.language)
$(x.code)
```
""", exception = err)
end
end
end
if haskey(fields, :Modules)
# Gather and filter docstrings.
modules = fields[:Modules]
order = get(fields, :Order, AUTODOCS_DEFAULT_ORDER)
pages = map(normpath, get(fields, :Pages, []))
public = get(fields, :Public, true)
private = get(fields, :Private, true)
filterfunc = get(fields, :Filter, x -> true)
results = []
for mod in modules
for (binding, multidoc) in Documenter.DocSystem.getmeta(mod)
# Which bindings should be included?
isexported = Base.isexported(mod, binding.var)
included = (isexported && public) || (!isexported && private)
# What category does the binding belong to?
category = Documenter.DocSystem.category(binding)
if category in order && included
# filter the elements after category/order has been evaluated
# to ensure that e.g. when `Order = [:type]` is given, the filter
# function really receives only types
filtered = Base.invokelatest(filterfunc, Core.eval(binding.mod, binding.var))
if filtered
for (typesig, docstr) in multidoc.docs
path = normpath(docstr.data[:path])
object = Utilities.Object(binding, typesig)
if isempty(pages)
push!(results, (mod, path, category, object, isexported, docstr))
else
for p in pages
if endswith(path, p)
push!(results, (mod, p, category, object, isexported, docstr))
break
end
end
end
end
end
end
end
end
# Sort docstrings.
modulemap = Documents.precedence(modules)
pagesmap = Documents.precedence(pages)
ordermap = Documents.precedence(order)
comparison = function (a, b)
local t
(t = Documents._compare(modulemap, 1, a, b)) == 0 || return t < 0 # module
a[5] == b[5] || return a[5] > b[5] # exported bindings before unexported ones.
(t = Documents._compare(pagesmap, 2, a, b)) == 0 || return t < 0 # page
(t = Documents._compare(ordermap, 3, a, b)) == 0 || return t < 0 # category
string(a[4]) < string(b[4]) # name
end
sort!(results; lt = comparison)
# Finalise docstrings.
nodes = DocsNode[]
for (mod, path, category, object, isexported, docstr) in results
if haskey(doc.internal.objects, object)
push!(doc.internal.errors, :autodocs_block)
@warn("""
duplicate docs found for '$(object.binding)' in $(Utilities.locrepr(page.source, lines))
```$(x.language)
$(x.code)
```
""")
continue
end
markdown = Markdown.MD(Documenter.DocSystem.parsedoc(docstr))
markdown.meta[:results] = [docstr]
doc.user.highlightsig && highlightsig!(markdown)
slug = Utilities.slugify(object)
anchor = Anchors.add!(doc.internal.docs, object, slug, page.build)
docsnode = DocsNode(markdown, anchor, object, page)
# Track the order of insertion of objects per-binding.
push!(get!(doc.internal.bindings, object.binding, Utilities.Object[]), object)
doc.internal.objects[object] = docsnode
push!(nodes, docsnode)
end
page.mapping[x] = DocsNodes(nodes)
else
push!(doc.internal.errors, :autodocs_block)
@warn("""
'@autodocs' missing 'Modules = ...' in $(Utilities.locrepr(page.source, lines))
```$(x.language)
$(x.code)
```
""")
page.mapping[x] = x
end
end
# @eval
# -----
function Selectors.runner(::Type{EvalBlocks}, x, page, doc)
sandbox = Module(:EvalBlockSandbox)
lines = Utilities.find_block_in_file(x.code, page.source)
cd(dirname(page.build)) do
result = nothing
for (ex, str) in Utilities.parseblock(x.code, doc, page; keywords = false)
try
result = Core.eval(sandbox, ex)
catch err
push!(doc.internal.errors, :eval_block)
@warn("""
failed to evaluate `@eval` block in $(Utilities.locrepr(page.source))
```$(x.language)
$(x.code)
```
""", exception = err)
end
end
page.mapping[x] = EvalNode(x, result)
end
end
# @index
# ------
function Selectors.runner(::Type{IndexBlocks}, x, page, doc)
node = Documents.buildnode(Documents.IndexNode, x, doc, page)
push!(doc.internal.indexnodes, node)
page.mapping[x] = node
end
# @contents
# ---------
function Selectors.runner(::Type{ContentsBlocks}, x, page, doc)
node = Documents.buildnode(Documents.ContentsNode, x, doc, page)
push!(doc.internal.contentsnodes, node)
page.mapping[x] = node
end
# @example
# --------
function Selectors.runner(::Type{ExampleBlocks}, x, page, doc)
# The sandboxed module -- either a new one or a cached one from this page.
name = match(r"^@example[ ]?(.*)$", first(split(x.language, ';', limit = 2)))[1]
sym = isempty(name) ? gensym("ex-") : Symbol("ex-", name)
mod = get!(() -> get_new_sandbox(sym), page.globals.meta, sym)
lines = Utilities.find_block_in_file(x.code, page.source)
# "parse" keyword arguments to example (we only need to look for continued = true)
continued = occursin(r"continued\s*=\s*true", x.language)
# Evaluate the code block. We redirect stdout/stderr to `buffer`.
result, buffer = nothing, IOBuffer()
if !continued # run the code
# check if there is any code wating
if haskey(page.globals.meta, :ContinuedCode) && haskey(page.globals.meta[:ContinuedCode], sym)
code = page.globals.meta[:ContinuedCode][sym] * '\n' * x.code
delete!(page.globals.meta[:ContinuedCode], sym)
else
code = x.code
end
for (ex, str) in Utilities.parseblock(code, doc, page; keywords = false)
(value, success, backtrace, text) = Utilities.withoutput() do
cd(dirname(page.build)) do
Core.eval(mod, ex)
end
end
Core.eval(mod, Expr(:global, Expr(:(=), :ans, QuoteNode(value))))
result = value
print(buffer, text)
if !success
push!(doc.internal.errors, :example_block)
@warn("""
failed to run `@example` block in $(Utilities.locrepr(page.source, lines))
```$(x.language)
$(x.code)
```
""", value)
page.mapping[x] = x
return
end
end
else # store the continued code
CC = get!(page.globals.meta, :ContinuedCode, Dict())
CC[sym] = get(CC, sym, "") * '\n' * x.code
end
# Splice the input and output into the document.
content = []
input = droplines(x.code)
# Generate different in different formats and let each writer select
output = Base.invokelatest(Utilities.display_dict, result)
# Only add content when there's actually something to add.
isempty(input) || push!(content, Markdown.Code("julia", input))
isempty(output) || push!(content, output)
# ... and finally map the original code block to the newly generated ones.
page.mapping[x] = Documents.MultiOutput(content)
end
# @repl
# -----
function Selectors.runner(::Type{REPLBlocks}, x, page, doc)
matched = match(r"^@repl[ ]?(.*)$", x.language)
matched === nothing && error("invalid '@repl' syntax: $(x.language)")
name = matched[1]
sym = isempty(name) ? gensym("ex-") : Symbol("ex-", name)
mod = get!(() -> get_new_sandbox(sym), page.globals.meta, sym)
code = split(x.code, '\n'; limit = 2)[end]
result, out = nothing, IOBuffer()
for (ex, str) in Utilities.parseblock(x.code, doc, page; keywords = false)
buffer = IOBuffer()
input = droplines(str)
(value, success, backtrace, text) = Utilities.withoutput() do
cd(dirname(page.build)) do
Core.eval(mod, ex)
end
end
Core.eval(mod, Expr(:global, Expr(:(=), :ans, QuoteNode(value))))
result = value
output = if success
hide = REPL.ends_with_semicolon(input)
Documenter.DocTests.result_to_string(buffer, hide ? nothing : value)
else
Documenter.DocTests.error_to_string(buffer, value, [])
end
isempty(input) || println(out, prepend_prompt(input))
print(out, text)
if isempty(input) || isempty(output)
println(out)
else
println(out, output, "\n")
end
end
page.mapping[x] = Markdown.Code("julia-repl", rstrip(String(take!(out))))
end
# @setup
# ------
function Selectors.runner(::Type{SetupBlocks}, x, page, doc)
matched = match(r"^@setup[ ](.+)$", x.language)
matched === nothing && error("invalid '@setup <name>' syntax: $(x.language)")
# The sandboxed module -- either a new one or a cached one from this page.
name = matched[1]
sym = isempty(name) ? gensym("ex-") : Symbol("ex-", name)
mod = get!(page.globals.meta, sym, Module(sym))::Module
# Evaluate whole @setup block at once instead of piecewise
page.mapping[x] =
try
cd(dirname(page.build)) do
include_string(mod, x.code)
end
Markdown.MD([])
catch err
push!(doc.internal.errors, :setup_block)
@warn("""
failed to run `@setup` block in $(Utilities.locrepr(page.source))
```$(x.language)
$(x.code)
```
""", exception=err)
x
end
# ... and finally map the original code block to the newly generated ones.
page.mapping[x] = Markdown.MD([])
end
# @raw
# ----
function Selectors.runner(::Type{RawBlocks}, x, page, doc)
m = match(r"@raw[ ](.+)$", x.language)
m === nothing && error("invalid '@raw <name>' syntax: $(x.language)")
page.mapping[x] = Documents.RawNode(Symbol(m[1]), x.code)
end
# Utilities.
# ----------
iscode(x::Markdown.Code, r::Regex) = occursin(r, x.language)
iscode(x::Markdown.Code, lang) = x.language == lang
iscode(x, lang) = false
const NAMEDHEADER_REGEX = r"^@id (.+)$"
function namedheader(h::Markdown.Header)
if isa(h.text, Vector) && length(h.text) === 1 && isa(h.text[1], Markdown.Link)
url = h.text[1].url
occursin(NAMEDHEADER_REGEX, url)
else
false
end
end
# Remove any `# hide` lines, leading/trailing blank lines, and trailing whitespace.
function droplines(code; skip = 0)
buffer = IOBuffer()
for line in split(code, '\n')[(skip + 1):end]
occursin(r"^(.*)#\s*hide$", line) && continue
println(buffer, rstrip(line))
end
strip(String(take!(buffer)), '\n')
end
function prepend_prompt(input)
prompt = "julia> "
padding = " "^length(prompt)
out = IOBuffer()
for (n, line) in enumerate(split(input, '\n'))
line = rstrip(line)
println(out, n == 1 ? prompt : padding, line)
end
rstrip(String(take!(out)))
end
function get_new_sandbox(name::Symbol)
m = Module(name)
# eval(expr) is available in the REPL (i.e. Main) so we emulate that for the sandbox
Core.eval(m, :(eval(x) = Core.eval($m, x)))
# modules created with Module() does not have include defined
Core.eval(m, :(include(x) = Base.include($m, abspath(x))))
return m
end
highlightsig!(x) = nothing
function highlightsig!(md::Markdown.MD)
isempty(md.content) || highlightsig!(first(md.content))
end
function highlightsig!(code::Markdown.Code)
if isempty(code.language)
code.language = "julia"
end
end
end