A shell function to update an installed Go binary

update-go-tool.sh

#!/usr/bin/env bash

# This takes advantage of the fact that "go version -m" writes out
# build metadata from a Go binary. We use this to extract the import
# path of the program, as well as any build tags it was built with.
# The latter we want so that when we update, we will get the same
# build tags.
#
# Note, however, that this will not work for cross-compiled programs.
# You could also extract GOOS and GOARCH and set those, but this script
# doesn't include that.

inst() {
    local t="${1:?missing file path}"
    shift 1
    local ipath tags
    ipath="$(go version -m --json "$t" | jq -r .Path)"
    tags="$(go version -m --json "$t" | jq -r '.Settings[]|select(.Key == "-tags").Value')"

    echo "P $ipath" ${@+"$@"} 1>&2
    go install ${tags:+-tags "$tags"} "$@" "$ipath"@latest
}