Merge #8767

8767: implement range formatting r=matklad a=euclio

Fixes #7580.

This PR implements the `textDocument/rangeFormatting` request using `rustfmt`'s `--file-lines` option.

Still needs some tests. What I want to know is how I should handle the instability of the `--file-lines` option. It's still unstable in rustfmt, so it's only available on nightly, and needs a special flag to enable. Is there a way for `rust-analyzer` to detect if it's using nightly rustfmt, or for users to opt-in?

Co-authored-by: Andy Russell <[email protected]>

1 files changed, 5 insertions, 0 deletions

diff --git a/editors/code/package.json b/editors/code/package.json
index 17d9281ff..05cbccf94 100644
--- a/editors/code/package.json
+++ b/editors/code/package.json
@@ -795,6 +795,11 @@
                         "type": "string"
                     }
                 },
+                "rust-analyzer.rustfmt.enableRangeFormatting": {
+                    "markdownDescription": "Enables the use of rustfmt's unstable range formatting command for the\n`textDocument/rangeFormatting` request. The rustfmt option is unstable and only\navailable on a nightly build.",
+                    "default": false,
+                    "type": "boolean"
+                },
                 "rust-analyzer.workspace.symbol.search.scope": {
                     "markdownDescription": "Workspace symbol search scope.",
                     "default": "workspace",