tree d17e904451220a468c40864bc00aba770af9eb43
parent 55e5cff61126558edd0ba9c5c2d06c8c29b8a499
author Dylan Le <dungtuanle@google.com> 1659552351 -0400
committer Dylan Le <dungtuanle@google.com> 1664899386 +0000

gopls/internal/lsp: add support for package renaming

Users can now rename packages by performing a rename on the package name in package declarations. The editor will prompt user with a dialogue text field to change the package name. This rename feature then do the following:
- Rename all the external imports of the renaming package. In case there is renaming conflicts within a file, the feature repeatedly try fresh names constructed by appending new package name with number of try times so far until succeed.
- Rename all the internal references to the renaming package from its files.
- Rename the directory of the renamed package and update the imports' paths of any packages nested under the renamed directory.
- Rename the test package with the new package name and suffix "_test" with the current test package name ends with "_test", or just the new package name otherwise.

The regression tests accounts for these edge cases:
- Only rename other known packages if the module path is same for both the renaming package and the other known packages.
- Prevent renaming main package.
- Test if the renaming package name is different from its path base.

Todo:
- Add a test for the case when the renaming package's path contains "internal" as a segment.
- Allow edit to the whole package path not just only the last segment of the package path
- Reject renaming if the renamed subpackages don't belong to the same module with the renaming package
- Check the go.mod files in the workspace to see if any replace directives need to be fixed if the renaming affects the locations of any go.mod files

Change-Id: I4ccb700df5a142c3fc1c06f3e5835f0f23da1ec5
Reviewed-on: https://go-review.googlesource.com/c/tools/+/420958
Run-TryBot: Dylan Le <dungtuanle@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>