Don't emit shared files when scraping examples from dependencies in Rustdoc

[willcrichton]

This PR fixes#91605. The issue is that Context::init gets called when scraping dependencies. By default, just calling init calls into write_shared and build_index which register the scraped crate into a list that later gets used for the Rustdoc sidebar. The fix is to ensure that write_shared is not called when scraping.

r? @jyn514

[jyn514]

This seems kind of hacky ... eventually I'd like to separate actually generating the HTML from creating the Context. But this is reasonable as a short term fix.

r=me if you don't feel like refactoring half of rustdoc 😁

@bors delegate=willcrichton

[bors]

✌️ @willcrichton can now approve this pull request

[willcrichton]

@bors r=jyn514

[bors]

📌 Commit b7de797 has been approved by jyn514

[bors]

⌛ Testing commit b7de797 with merge 695c53cca37057a9e61db16840932e68adf7acf6...

[rust-log-analyzer]

The job x86_64-mingw-1 failed! Check out the build log: (web)(plain)

Click to see the possible cause of the failure (guessed by this bot)

failures:
---- process::tests::test_interior_nul_in_arg_is_error stdout ----
thread 'process::tests::test_interior_nul_in_arg_is_error' panicked at 'assertion failed: `(left == right)`
left: `NotFound`,
right: `InvalidInput`', library\std\src\process\tests.rs:309:19
---- process::tests::test_interior_nul_in_args_is_error stdout ----
thread 'process::tests::test_interior_nul_in_args_is_error' panicked at 'assertion failed: `(left == right)`
left: `NotFound`,
left: `NotFound`,
right: `InvalidInput`', library\std\src\process\tests.rs:317:19
---- process::tests::test_interior_nul_in_current_dir_is_error stdout ----
thread 'process::tests::test_interior_nul_in_current_dir_is_error' panicked at 'assertion failed: `(left == right)`
left: `NotFound`,
left: `NotFound`,
right: `InvalidInput`', library\std\src\process\tests.rs:325:19
---- sys::windows::process::tests::windows_exe_resolver stdout ----
---- sys::windows::process::tests::windows_exe_resolver stdout ----
thread 'sys::windows::process::tests::windows_exe_resolver' panicked at 'assertion failed: resolve_exe(OsStr::new(\"rustc\"), child_paths).is_ok()', library\std\src\sys\windows\process\tests.rs:174:5
failures:
process::tests::test_interior_nul_in_arg_is_error
process::tests::test_interior_nul_in_args_is_error
process::tests::test_interior_nul_in_args_is_error
process::tests::test_interior_nul_in_current_dir_is_error
sys::windows::process::tests::windows_exe_resolver
test result: FAILED. 879 passed; 4 failed; 3 ignored; 0 measured; 0 filtered out; finished in 13.90s
error: test failed, to rerun pass '-p std --lib'
command did not execute successfully: "\\\\?\\D:\\a\\rust\\rust\\build\\x86_64-pc-windows-gnu\\stage0\\bin\\cargo.exe" "test" "--target" "x86_64-pc-windows-gnu" "-Zbinary-dep-depinfo" "-j" "8" "--release" "--locked" "--color" "always" "--features" "panic-unwind backtrace profiler compiler-builtins-c" "--manifest-path" "D:\\a\\rust\\rust\\library/test/Cargo.toml" "-p" "std" "--"
Build completed unsuccessfully in 0:52:02
Build completed unsuccessfully in 0:52:02
make: *** [Makefile:80: ci-mingw-subset-1] Error 1

[bors]

💔 Test failed - checks-actions

[ehuss]

@bors retry

Windows test_interior_nul issue