Fix to allow -o flag to point to a directory - #5569
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asadkhanbn600i wants to merge 1 commit into
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Previously, running 'tinygo build -o dist/ file.go' where dist/ already exists as a directory failed with 'open dist/: is a directory', because Build() only auto-derived a binary name when outpath was empty, not when it pointed to an existing directory. This adds that check, matching the behavior of 'go build -o dir/' with a package. Note: only handles the case where the directory already exists; if the directory doesn't exist yet, behavior is unchanged.
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What this does
Fixes
tinygo build -o <dir>/ ...failing withopen <dir>/: is a directorywhen the target directory already exists.
Why
Build()in main.go only derived a default binary name whenoutpath == "".If
outpathwas explicitly set but pointed to an existing directory, thecode fell straight to
os.Rename(result.Binary, outpath), which failssince a directory can't be renamed-over/opened as a file.
Fix
Added a check: if
outpathis a directory, derive the same default binaryname used in the empty-outpath case, and place the binary inside that
directory — mirroring how
go build -o dir/behaves for a package.Scope
Only handles the case where the directory already exists. If
-o somedir/is given and
somedirdoesn't exist yet, behavior is unchanged. Happy toextend this in a follow-up if maintainers want that too.
Testing
make testpasses locally(unchanged), and no
-oflag (unchanged)