cmd/go: validating version format in mod edit

Version strings set by -retract and -exclude are not canonicalized
by go mod commands. This change adds validation to go mod edit to
prevent invalid version strings from being added to the go.mod file.

For golang/go#43280

Change-Id: I3708b7a09111a56effac1fe1165122772e3f2d75
Reviewed-on: https://go-review.googlesource.com/c/mod/+/279394
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Trust: Michael Matloob <matloob@golang.org>
2 files changed
tree: b8784b71df17a91cca4512b35432bf969160e428
  1. LICENSE
  2. PATENTS
  3. README.md
  4. codereview.cfg
  5. go.mod
  6. go.sum
  7. gosumcheck/
  8. internal/
  9. modfile/
  10. module/
  11. semver/
  12. sumdb/
  13. zip/
README.md

mod

PkgGoDev

This repository holds packages for writing tools that work directly with Go module mechanics. That is, it is for direct manipulation of Go modules themselves.

It is NOT about supporting general development tools that need to do things like load packages in module mode. That use case, where modules are incidental rather than the focus, should remain in x/tools, specifically x/tools/go/packages.

The specific case of loading packages should still be done by invoking the go command, which remains the single point of truth for package loading algorithms.