cmd/go/internal/modfetch: check errors for if file does not exist

The Repo interface now calls out that for ReadFile if the error
reports that the requested file does not exist, then os.IsNotExist
should return true. Use this information when returning an
error message to the user.

This will help users diagnose errors quicker and more accuratly.

Extracted from https://golang.org/cl/114005

Change-Id: Ifb6122f0e8449c2b5bdad5af6bce1b038a3fe616
Reviewed-on: https://go-review.googlesource.com/119135
Reviewed-by: Russ Cox <rsc@golang.org>
4 files changed
tree: 6ce1c5e4285edca44f61e1e2862d67e23dc4defe
  1. AUTHORS
  2. CONTRIBUTING.md
  3. CONTRIBUTORS
  4. LICENSE
  5. PATENTS
  6. README.md
  7. codereview.cfg
  8. main.go
  9. vendor/
README.md

Versioned Go Prototype (vgo)

This repository holds a prototype of what the go command might look like with integrated support for package versioning.

See research.swtch.com/vgo for documents about the design.

Download/Install

Use go get -u golang.org/x/vgo.

You can also manually git clone the repository to $GOPATH/src/golang.org/x/vgo.

Report Issues / Send Patches

See CONTRIBUTING.md.

This is still a very early prototype. You are likely to run into bugs. Please file bugs in the main Go issue tracker, golang.org/issue, and put the prefix x/vgo: in the issue title.

Thank you.