rustdoc: Add support for --remap-path-prefix

Adds --remap-path-prefix as an unstable option. This is implemented to
mimic the behavior of rustc's --remap-path-prefix but with minor
adjustments.

This flag similarly takes in two paths, a prefix to replace and a
replacement string.

1 files changed, 13 insertions, 0 deletions

diff --git a/tests/rustdoc-ui/remap-path-prefix-invalid-doctest.rs b/tests/rustdoc-ui/remap-path-prefix-invalid-doctest.rs
new file mode 100644
index 00000000000..2e023e32d7a
--- /dev/null
+++ b/tests/rustdoc-ui/remap-path-prefix-invalid-doctest.rs
@@ -0,0 +1,13 @@
+// FIXME: if/when the output of the test harness can be tested on its own, this test should be
+// adapted to use that, and that normalize line can go away
+
+//@ failure-status: 101
+//@ compile-flags:--test -Z unstable-options --remap-path-prefix={{src-base}}=remapped_path --test-args --test-threads=1
+//@ rustc-env:RUST_BACKTRACE=0
+//@ normalize-stdout-test "finished in \d+\.\d+s" -> "finished in $$TIME"
+
+// doctest fails to compile
+/// ```
+/// this is not real code
+/// ```
+pub struct SomeStruct;