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update Go mod support

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It turned out that changes like
https://github.com/kubernetes-csi/csi-lib-utils/pull/33 should better
have been committed after `go mod tidy` because that adds some
indirect dependencies in that example.

The revised `test-vendor` checks for that and (just in case that this
ever becomes desired) allows projects to not have a vendor directory
when using `go mod`.

How to use `go mod` properly gets documented in the README.md, because
there are such pitfalls.
This commit is contained in:
Patrick Ohly
2019-10-04 14:08:31 +02:00
parent 03999882f6
commit 194289aa8e
2 changed files with 79 additions and 10 deletions
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55
build.make
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@@ -125,6 +125,26 @@ test-fmt:
# - the fabricated merge commit leaves go.mod, go.sum and vendor dir unchanged
# - release-tools also didn't change (changing rules or Go version might lead to
# a different result and thus must be tested)
# - import statements not changed (because if they change, go.mod might have to be updated)
#
# "git diff" is intelligent enough to annotate changes inside the "import" block in
# the start of the diff hunk:
#
# diff --git a/rpc/common.go b/rpc/common.go
# index bb4a5c4..5fa4271 100644
# --- a/rpc/common.go
# +++ b/rpc/common.go
# @@ -21,7 +21,6 @@ import (
# "fmt"
# "time"
#
# - "google.golang.org/grpc"
# "google.golang.org/grpc/codes"
# "google.golang.org/grpc/status"
#
# We rely on that to find such changes.
#
# Vendoring is optional when using go.mod.
.PHONY: test-vendor
test: test-vendor
test-vendor:
@@ -135,22 +155,37 @@ test-vendor:
*v0.[56789]*) dep check && echo "vendor up-to-date" || false;; \
*) echo "skipping check, dep >= 0.5 required";; \
esac; \
else \
echo "Repo uses 'go mod' for vendoring."; \
elif [ -f go.mod ]; then \
echo "Repo uses 'go mod'."; \
if [ "$${JOB_NAME}" ] && \
( [ "$${JOB_TYPE}" != "presubmit" ] || \
[ $$(git diff "${PULL_BASE_SHA}..HEAD" -- go.mod go.sum vendor release-tools | wc -l) -eq 0 ] ); then \
echo "Skipping vendor check because the Prow pre-submit job does not change vendoring."; \
elif ! GO111MODULE=on go mod vendor; then \
[ $$( (git diff "${PULL_BASE_SHA}..HEAD" -- go.mod go.sum vendor release-tools; \
git diff "${PULL_BASE_SHA}..HEAD" | grep -e '^@@.*@@ import (' -e '^[+-]import') | \
wc -l) -eq 0 ] ); then \
echo "Skipping vendor check because the Prow pre-submit job does not affect dependencies."; \
elif ! GO111MODULE=on go mod tidy; then \
echo "ERROR: vendor check failed."; \
false; \
elif [ $$(git status --porcelain -- vendor | wc -l) -gt 0 ]; then \
echo "ERROR: vendor directory *not* up-to-date, it did get modified by 'GO111MODULE=on go mod vendor':"; \
git status -- vendor; \
git diff -- vendor; \
elif [ $$(git status --porcelain -- go.mod go.sum | wc -l) -gt 0 ]; then \
echo "ERROR: go module files *not* up-to-date, they did get modified by 'GO111MODULE=on go mod tidy':"; \
git diff -- go.mod go.sum; \
false; \
elif [ -d vendor ]; then \
if ! GO111MODULE=on go mod vendor; then \
echo "ERROR: vendor check failed."; \
false; \
elif [ $$(git status --porcelain -- vendor | wc -l) -gt 0 ]; then \
echo "ERROR: vendor directory *not* up-to-date, it did get modified by 'GO111MODULE=on go mod vendor':"; \
git status -- vendor; \
git diff -- vendor; \
false; \
else \
echo "Go dependencies and vendor directory up-to-date."; \
fi; \
else \
echo "Go dependencies up-to-date."; \
fi; \
fi;
fi
.PHONY: test-subtree
test: test-subtree