Implements VOLTA_FEATURE_YARN=0
#2057
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I'm implementing a version manager for Yarn, and Volta gets in the way: every call to
nodecorrupts the PATH by shadowing the existingyarnbinary.In theory Volta should be smarter and only update the PATH for binaries it's sure to own (see #2053), but in practice this is likely to be a significant change and I doubt we have the bandwidth to land this kind of change medium term.
Instead, this PR implements a
VOLTA_FEATURE_YARN=0environment variable that, when set, will prevent Volta from shadowing the Yarn binary. Any wrapper meant to own the management of Yarn releases can then set this variable.