Merge #8595

8595: Diagnostic paths support specifying `remapPrefix` r=rickvanprim a=rickvanprim

Currently VSCode Problem Matchers will resolve a path like `//foo_crate/src/main.rs` if `${workspaceFolder}/foo_crate/src/main.rs` exists.  Presumably their behavior is functionally a string concatenation that would produce `${workspaceFolder///foo_crate/src/main.rs` and repeated path separators get ignored.

This PR attempts to mimic this behavior by stripping any `Component::RootDir` from `file_name` before joining it to `workspace_root`, and then checking if the file exists.  If it does, this path is used, and if not, the behavior falls through to the existing Rust path join behavior.

Co-authored-by: James Leitch <[email protected]>

1 files changed, 6 insertions, 1 deletions

diff --git a/editors/code/package.json b/editors/code/package.json
index 06ed62d8d..fa5632f90 100644
--- a/editors/code/package.json
+++ b/editors/code/package.json
@@ -565,6 +565,11 @@
                     },
                     "uniqueItems": true
                 },
+                "rust-analyzer.diagnostics.remapPrefix": {
+                    "markdownDescription": "Map of prefixes to be substituted when parsing diagnostic file paths.\nThis should be the reverse mapping of what is passed to `rustc` as `--remap-path-prefix`.",
+                    "default": {},
+                    "type": "object"
+                },
                 "rust-analyzer.diagnostics.warningsAsHint": {
                     "markdownDescription": "List of warnings that should be displayed with info severity.\n\nThe warnings will be indicated by a blue squiggly underline in code\nand a blue icon in the `Problems Panel`.",
                     "default": [],
@@ -1195,4 +1200,4 @@
             ]
         }
     }
-}
\ No newline at end of file
+}