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Code loading: do the "skipping mtime check for stdlib" check regardless of the value of ispath(f) #50919

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Code loading: do the "skipping mtime check for stdlib" check regardless of the value of ispath(f) #50919

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239a1d7
Code loading: do the "skipping mtime check for stdlib" check in both …
DilumAluthge Aug 15, 2023
10d79a4
Reorganize the code to try to reduce code duplication
DilumAluthge Aug 15, 2023
5b50ca4
Include the value of `ispath(f)` in the debug message
DilumAluthge Aug 15, 2023
0c31ab1
Add an explanatory comment
DilumAluthge Aug 15, 2023
f1f1fc9
Only compute `ispath(f)` once
DilumAluthge Aug 15, 2023
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18 changes: 12 additions & 6 deletions base/loading.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -3117,13 +3117,19 @@ end
end
for chi in includes
f, ftime_req = chi.filename, chi.mtime
if !ispath(f)
if ispath(f)
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Is it even necessary to branch on the value of ispath(f) here? Can we just get rid of the branch, and do _f = fixup_stdlib_path(f) unconditionally?

Presumably, if f is already a valid filesystem path, we would expect the replace inside fixup_stdlib_path to have no effect, right?

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@DilumAluthge DilumAluthge Aug 15, 2023 •
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Or are we trying to avoid calling the potentially expensive fixup_stdlib_path(f) if we don't need to?

_f = f
else
_f = fixup_stdlib_path(f)
if isfile(_f) && startswith(_f, Sys.STDLIB)
# mtime is changed by extraction
@debug "Skipping mtime check for file $f used by $cachefile, since it is a stdlib"
continue
end
end
if isfile(_f) && startswith(_f, Sys.STDLIB)
# mtime is changed by extraction
# Note: we intentionally include the value of `ispath(f)` in the following debug message,
# to help debug which branch we went down.
@debug "Skipping mtime check for file $f used by $cachefile, since it is a stdlib" ispath(f)
continue
end
if !ispath(f)
@debug "Rejecting stale cache file $cachefile because file $f does not exist"
return true
end
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