Hi,
Using Go 1.14, I'm working on a parent codebase which, in its go.mod
file, has a number of replace statements referencing legacy child
codebases which have not yet converted to Go modules.
At this stage the legacy child codebases handle versioning by branch,
rather than using semantic versioning, so my go.mod file has a number of
statements like these:
replace github.com/foo/bar => github.com/foo/bar
v0.0.0-2020xxxxxxxxxx-hhhhhhhhhhhh // should track branch baz
replace github.com/foo/bar1 => github.com/foo/bar1
v0.0.0-2020yyyyyyyyyy-iiiiiiiiiiii // should track branch baz
My goal is to be confident that if I update dependencies in the parent
codebase (go get -u ./...), I'll be pulling in HEAD on the relevant
branch of all the legacy child dependencies.
My expectation is that this is a transitional use case because
eventually the child codebases will migrate to Go modules, but until
then, it's important to me to know I will pull in critical fixes from
the child dependencies if they happen.
The difficulty I've got is ensuring that the replace stanzas are valid
and up-to-date. I'm not finding a great way to do this with the Go
module tooling and I wonder if I'm missing anything. Here are the
feasible ugly alternatives I've found so far:
1. Child by child, abuse the fact that `go mod tidy` rightly or wrongly
seems to tolerate a single legacy branch reference in the file at a time
and rewrites it to the v0.0.0-2020xxxxxxxxxx-hhhhhhhhhhhh format:
go mod edit -replace github.com/foo/bar=github.com/foo/bar@baz
go mod tidy
go mod edit -replace github.com/foo/bar1=github.com/foo/bar1@baz
go mod tidy
...etc...
go get -u ./...
2. A script to be run manually (or via go generate? yikes!) before
running go get -u ./..., containing abominations like this:
go mod edit -replace github.com/foo/bar=$(go list -mod=mod -m
github.com/foo/bar@baz | sed -e 's/ /@/')
go mod edit -replace github.com/foo/bar1=$(go list -mod=mod -m
github.com/foo/bar1@baz | sed -e 's/ /@/')
...etc...
go get -u ./...
3. Alternative abominations like this:
go mod edit -replace github.com/foo/bar=github.com/foo/bar $(curl -s
https://proxy.golang.org/github.com/foo/bar/@v/baz.info | jq -r .Version)
go mod edit -replace github.com/foo/bar1=github.com/foo/bar1 $(curl -s
https://proxy.golang.org/github.com/foo/bar1/@v/baz.info | jq -r .Version)
...etc...
go get -u ./...
I'm wondering: is there a better way? Should there be?
Many thanks!
Jim Minter
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