building compare sources

[yash-zededa]

modified the building command used for the compare sources utility.

[deitch]

We should separate that "local GOOS" evaluation into its own section of the Makefile, but that definitely is for later.

LGTM

[eriknordmark]

How are you manually testing this?

I converted it to shell syntax and tried it as
COMPARESOURCE=./build-tools/bin/compare-sbom-sources
COMPARE_SOURCE=./tools/compare-sbom-sources
GOOS=$(uname -s | tr '[A-Z]' '[a-z]') CGO_ENABLED=0 go build -o ${COMPARESOURCES} -C ${COMPARE_SOURCE}

and that fails with the same error as before:
go: cannot find main module, but found .git/config in /home/nordmark/fixes/eve
to create a module there, run:
go mod init

I observe that the existing case we have of using go build in the Makefile (for LINUXKIT) does a cd to the directory and passes in a -mod vendor argument. Do we need the same here?

[deitch]

and that fails with the same error as before:
go: cannot find main module, but found .git/config in /home/nordmark/fixes/eve
to create a module there, run:
go mod init

It does? What version of go? go has supported -C for quite some time. @yash-zededa and I were on a call, and we ran it, saw that it worked.

[eriknordmark]

and that fails with the same error as before:
go: cannot find main module, but found .git/config in /home/nordmark/fixes/eve
to create a module there, run:
go mod init

It does? What version of go? go has supported -C for quite some time. @yash-zededa and I were on a call, and we ran it, saw that it worked.

My bad; COMPARESOURCES vs COMPARESOURCE in my manual setup as you can trivially see in my comment above ;-)

[eriknordmark]

LGTM