rustdoc: remove `--passes` and `--no-defaults`

- flags no longer function, see #44136
- adjust tests to match new behavior
- removed test issue-42875 (covered regression with --no-defaults)
- moved input-format to removed flags
- move all removed flags to bottom
- note flag removal in command help
- remove DefaultPassOption enum (now redundant with `show_coverage`)

13 files changed, 99 insertions, 157 deletions

diff --git a/src/librustdoc/config.rs b/src/librustdoc/config.rs
index 35df5fa1b74..961a98a7205 100644
--- a/src/librustdoc/config.rs
+++ b/src/librustdoc/config.rs
@@ -24,7 +24,7 @@ use crate::html::markdown::IdMap;
 use crate::html::render::StylePath;
 use crate::html::static_files;
 use crate::opts;
-use crate::passes::{self, Condition, DefaultPassOption};
+use crate::passes::{self, Condition};
 use crate::scrape_examples::{AllCallLocations, ScrapeExamplesOptions};
 use crate::theme;
 
@@ -128,14 +128,6 @@ crate struct Options {
     crate test_builder: Option<PathBuf>,
 
     // Options that affect the documentation process
-    /// The selected default set of passes to use.
-    ///
-    /// Be aware: This option can come both from the CLI and from crate attributes!
-    crate default_passes: DefaultPassOption,
-    /// Any passes manually selected by the user.
-    ///
-    /// Be aware: This option can come both from the CLI and from crate attributes!
-    crate manual_passes: Vec<String>,
     /// Whether to run the `calculate-doc-coverage` pass, which counts the number of public items
     /// with and without documentation.
     crate show_coverage: bool,
@@ -192,8 +184,6 @@ impl fmt::Debug for Options {
             .field("test_args", &self.test_args)
             .field("test_run_directory", &self.test_run_directory)
             .field("persist_doctests", &self.persist_doctests)
-            .field("default_passes", &self.default_passes)
-            .field("manual_passes", &self.manual_passes)
             .field("show_coverage", &self.show_coverage)
             .field("crate_version", &self.crate_version)
             .field("render_options", &self.render_options)
@@ -605,15 +595,6 @@ impl Options {
 
         let show_coverage = matches.opt_present("show-coverage");
 
-        let default_passes = if matches.opt_present("no-defaults") {
-            passes::DefaultPassOption::None
-        } else if show_coverage {
-            passes::DefaultPassOption::Coverage
-        } else {
-            passes::DefaultPassOption::Default
-        };
-        let manual_passes = matches.opt_strs("passes");
-
         let crate_types = match parse_crate_types_from_list(matches.opt_strs("crate-type")) {
             Ok(types) => types,
             Err(e) => {
@@ -710,8 +691,6 @@ impl Options {
             lint_cap,
             should_test,
             test_args,
-            default_passes,
-            manual_passes,
             show_coverage,
             crate_version,
             test_run_directory,
@@ -769,33 +748,38 @@ impl Options {
 
 /// Prints deprecation warnings for deprecated options
 fn check_deprecated_options(matches: &getopts::Matches, diag: &rustc_errors::Handler) {
-    let deprecated_flags = ["input-format", "no-defaults", "passes"];
+    let deprecated_flags = [];
+
+    for &flag in deprecated_flags.iter() {
+        if matches.opt_present(flag) {
+            diag.struct_warn(&format!("the `{}` flag is deprecated", flag))
+                .note(
+                    "see issue #44136 <https://github.com/rust-lang/rust/issues/44136> \
+                    for more information",
+                )
+                .emit();
+        }
+    }
+
+    let removed_flags = ["plugins", "plugin-path", "no-defaults", "passes", "input-format"];
 
-    for flag in deprecated_flags.iter() {
+    for &flag in removed_flags.iter() {
         if matches.opt_present(flag) {
-            let mut err = diag.struct_warn(&format!("the `{}` flag is deprecated", flag));
+            let mut err = diag.struct_warn(&format!("the `{}` flag no longer functions", flag));
             err.note(
                 "see issue #44136 <https://github.com/rust-lang/rust/issues/44136> \
-                 for more information",
+                for more information",
             );
 
-            if *flag == "no-defaults" {
+            if flag == "no-defaults" || flag == "passes" {
                 err.help("you may want to use --document-private-items");
+            } else if flag == "plugins" || flag == "plugin-path" {
+                err.warn("see CVE-2018-1000622");
             }
 
             err.emit();
         }
     }
-
-    let removed_flags = ["plugins", "plugin-path"];
-
-    for &flag in removed_flags.iter() {
-        if matches.opt_present(flag) {
-            diag.struct_warn(&format!("the '{}' flag no longer functions", flag))
-                .warn("see CVE-2018-1000622")
-                .emit();
-        }
-    }
 }
 
 /// Extracts `--extern-html-root-url` arguments from `matches` and returns a map of crate names to
diff --git a/src/librustdoc/core.rs b/src/librustdoc/core.rs
index c58310947d2..5b1ff7d89d2 100644
--- a/src/librustdoc/core.rs
+++ b/src/librustdoc/core.rs
@@ -35,7 +35,7 @@ use crate::clean::inline::build_external_trait;
 use crate::clean::{self, ItemId, TraitWithExtraInfo};
 use crate::config::{Options as RustdocOptions, OutputFormat, RenderOptions};
 use crate::formats::cache::Cache;
-use crate::passes::{self, Condition::*, ConditionalPass};
+use crate::passes::{self, Condition::*};
 
 crate use rustc_session::config::{DebuggingOptions, Input, Options};
 
@@ -327,8 +327,7 @@ crate fn create_resolver<'a>(
 crate fn run_global_ctxt(
     tcx: TyCtxt<'_>,
     resolver: Rc<RefCell<interface::BoxedResolver>>,
-    mut default_passes: passes::DefaultPassOption,
-    manual_passes: Vec<String>,
+    show_coverage: bool,
     render_options: RenderOptions,
     output_format: OutputFormat,
 ) -> (clean::Crate, RenderOptions, Cache) {
@@ -420,11 +419,13 @@ crate fn run_global_ctxt(
             diag.struct_span_warn(sp, &format!("the `#![doc({})]` attribute is deprecated", name));
         msg.note(
             "see issue #44136 <https://github.com/rust-lang/rust/issues/44136> \
-             for more information",
+            for more information",
         );
 
         if name == "no_default_passes" {
-            msg.help("you may want to use `#![doc(document_private_items)]`");
+            msg.help("`#![doc(no_default_passes)]` no longer functions; you may want to use `#![doc(document_private_items)]`");
+        } else if name.starts_with("passes") {
+            msg.help("`#![doc(passes = \"...\")]` no longer functions; you may want to use `#![doc(document_private_items)]`");
         } else if name.starts_with("plugins") {
             msg.warn("`#![doc(plugins = \"...\")]` no longer functions; see CVE-2018-1000622 <https://nvd.nist.gov/vuln/detail/CVE-2018-1000622>");
         }
@@ -432,54 +433,24 @@ crate fn run_global_ctxt(
         msg.emit();
     }
 
-    let parse_pass = |name: &str, sp: Option<Span>| {
-        if let Some(pass) = passes::find_pass(name) {
-            Some(ConditionalPass::always(pass))
-        } else {
-            let msg = &format!("ignoring unknown pass `{}`", name);
-            let mut warning = if let Some(sp) = sp {
-                tcx.sess.struct_span_warn(sp, msg)
-            } else {
-                tcx.sess.struct_warn(msg)
-            };
-            if name == "collapse-docs" {
-                warning.note("the `collapse-docs` pass was removed in #80261 <https://github.com/rust-lang/rust/pull/80261>");
-            }
-            warning.emit();
-            None
-        }
-    };
-
-    let mut manual_passes: Vec<_> =
-        manual_passes.into_iter().flat_map(|name| parse_pass(&name, None)).collect();
-
     // Process all of the crate attributes, extracting plugin metadata along
     // with the passes which we are supposed to run.
     for attr in krate.module.attrs.lists(sym::doc) {
         let diag = ctxt.sess().diagnostic();
 
         let name = attr.name_or_empty();
-        if attr.is_word() {
-            if name == sym::no_default_passes {
-                report_deprecated_attr("no_default_passes", diag, attr.span());
-                if default_passes == passes::DefaultPassOption::Default {
-                    default_passes = passes::DefaultPassOption::None;
-                }
-            }
-        } else if let Some(value) = attr.value_str() {
+        // `plugins = "..."`, `no_default_passes`, and `passes = "..."` have no effect
+        if attr.is_word() && name == sym::no_default_passes {
+            report_deprecated_attr("no_default_passes", diag, attr.span());
+        } else if attr.value_str().is_some() {
             match name {
                 sym::passes => {
                     report_deprecated_attr("passes = \"...\"", diag, attr.span());
                 }
                 sym::plugins => {
                     report_deprecated_attr("plugins = \"...\"", diag, attr.span());
-                    continue;
                 }
-                _ => continue,
-            };
-            for name in value.as_str().split_whitespace() {
-                let span = attr.name_value_literal_span().unwrap_or_else(|| attr.span());
-                manual_passes.extend(parse_pass(name, Some(span)));
+                _ => (),
             }
         }
 
@@ -488,10 +459,9 @@ crate fn run_global_ctxt(
         }
     }
 
-    let passes = passes::defaults(default_passes).iter().copied().chain(manual_passes);
     info!("Executing passes");
 
-    for p in passes {
+    for p in passes::defaults(show_coverage) {
         let run = match p.condition {
             Always => true,
             WhenDocumentPrivate => ctxt.render_options.document_private,
diff --git a/src/librustdoc/lib.rs b/src/librustdoc/lib.rs
index 8699ab20b19..9a704bc3d87 100644
--- a/src/librustdoc/lib.rs
+++ b/src/librustdoc/lib.rs
@@ -274,9 +274,6 @@ fn opts() -> Vec<RustcOptGroup> {
         stable("h", |o| o.optflagmulti("h", "help", "show this help message")),
         stable("V", |o| o.optflagmulti("V", "version", "print rustdoc's version")),
         stable("v", |o| o.optflagmulti("v", "verbose", "use verbose output")),
-        stable("r", |o| {
-            o.optopt("r", "input-format", "the input type of the specified file", "[rust]")
-        }),
         stable("w", |o| o.optopt("w", "output-format", "the output type to write", "[html]")),
         stable("output", |o| {
             o.optopt(
@@ -313,21 +310,9 @@ fn opts() -> Vec<RustcOptGroup> {
                 "give precedence to `--extern-html-root-url`, not `html_root_url`",
             )
         }),
-        stable("plugin-path", |o| o.optmulti("", "plugin-path", "removed", "DIR")),
         stable("C", |o| {
             o.optmulti("C", "codegen", "pass a codegen option to rustc", "OPT[=VALUE]")
         }),
-        stable("passes", |o| {
-            o.optmulti(
-                "",
-                "passes",
-                "list of passes to also run, you might want to pass it multiple times; a value of \
-                 `list` will print available passes",
-                "PASSES",
-            )
-        }),
-        stable("plugins", |o| o.optmulti("", "plugins", "removed", "PLUGINS")),
-        stable("no-default", |o| o.optflagmulti("", "no-defaults", "don't run the default passes")),
         stable("document-private-items", |o| {
             o.optflagmulti("", "document-private-items", "document private items")
         }),
@@ -653,6 +638,51 @@ fn opts() -> Vec<RustcOptGroup> {
                 "path to function call information (for displaying examples in the documentation)",
             )
         }),
+        // deprecated / removed options
+        stable("plugin-path", |o| {
+            o.optmulti(
+                "",
+                "plugin-path",
+                "removed, see issue #44136 <https://github.com/rust-lang/rust/issues/44136> \
+                for more information",
+                "DIR",
+            )
+        }),
+        stable("passes", |o| {
+            o.optmulti(
+                "",
+                "passes",
+                "removed, see issue #44136 <https://github.com/rust-lang/rust/issues/44136> \
+                for more information",
+                "PASSES",
+            )
+        }),
+        stable("plugins", |o| {
+            o.optmulti(
+                "",
+                "plugins",
+                "removed, see issue #44136 <https://github.com/rust-lang/rust/issues/44136> \
+                for more information",
+                "PLUGINS",
+            )
+        }),
+        stable("no-default", |o| {
+            o.optflagmulti(
+                "",
+                "no-defaults",
+                "removed, see issue #44136 <https://github.com/rust-lang/rust/issues/44136> \
+                for more information",
+            )
+        }),
+        stable("r", |o| {
+            o.optopt(
+                "r",
+                "input-format",
+                "removed, see issue #44136 <https://github.com/rust-lang/rust/issues/44136> \
+                for more information",
+                "[rust]",
+            )
+        }),
     ]
 }
 
@@ -761,11 +791,9 @@ fn main_options(options: config::Options) -> MainResult {
     // plug/cleaning passes.
     let crate_version = options.crate_version.clone();
 
-    let default_passes = options.default_passes;
     let output_format = options.output_format;
     // FIXME: fix this clone (especially render_options)
     let externs = options.externs.clone();
-    let manual_passes = options.manual_passes.clone();
     let render_options = options.render_options.clone();
     let scrape_examples_options = options.scrape_examples_options.clone();
     let config = core::create_config(options);
@@ -796,8 +824,7 @@ fn main_options(options: config::Options) -> MainResult {
                     core::run_global_ctxt(
                         tcx,
                         resolver,
-                        default_passes,
-                        manual_passes,
+                        show_coverage,
                         render_options,
                         output_format,
                     )
diff --git a/src/librustdoc/passes/mod.rs b/src/librustdoc/passes/mod.rs
index 99ac87db4ff..2c2bf2b8c0f 100644
--- a/src/librustdoc/passes/mod.rs
+++ b/src/librustdoc/passes/mod.rs
@@ -125,27 +125,9 @@ impl ConditionalPass {
     }
 }
 
-/// A shorthand way to refer to which set of passes to use, based on the presence of
-/// `--no-defaults` and `--show-coverage`.
-#[derive(Copy, Clone, PartialEq, Eq, Debug)]
-crate enum DefaultPassOption {
-    Default,
-    Coverage,
-    None,
-}
-
 /// Returns the given default set of passes.
-crate fn defaults(default_set: DefaultPassOption) -> &'static [ConditionalPass] {
-    match default_set {
-        DefaultPassOption::Default => DEFAULT_PASSES,
-        DefaultPassOption::Coverage => COVERAGE_PASSES,
-        DefaultPassOption::None => &[],
-    }
-}
-
-/// If the given name matches a known pass, returns its information.
-crate fn find_pass(pass_name: &str) -> Option<Pass> {
-    PASSES.iter().find(|p| p.name == pass_name).copied()
+crate fn defaults(show_coverage: bool) -> &'static [ConditionalPass] {
+    if show_coverage { COVERAGE_PASSES } else { DEFAULT_PASSES }
 }
 
 /// Returns a span encompassing all the given attributes.
diff --git a/src/test/rustdoc-ui/deprecated-attrs.rs b/src/test/rustdoc-ui/deprecated-attrs.rs
index 5febc5eb9cd..4f6a14fc2c2 100644
--- a/src/test/rustdoc-ui/deprecated-attrs.rs
+++ b/src/test/rustdoc-ui/deprecated-attrs.rs
@@ -1,16 +1,15 @@
 // check-pass
 // compile-flags: --passes unknown-pass
-// error-pattern: ignoring unknown pass `unknown-pass`
+// error-pattern: the `passes` flag no longer functions
 
 #![doc(no_default_passes)]
 //~^ WARNING attribute is deprecated
 //~| NOTE see issue #44136
-//~| HELP use `#![doc(document_private_items)]`
+//~| HELP no longer functions; you may want to use `#![doc(document_private_items)]`
 #![doc(passes = "collapse-docs unindent-comments")]
 //~^ WARNING attribute is deprecated
 //~| NOTE see issue #44136
-//~| WARNING ignoring unknown pass
-//~| NOTE `collapse-docs` pass was removed
+//~| HELP no longer functions; you may want to use `#![doc(document_private_items)]`
 #![doc(plugins = "xxx")]
 //~^ WARNING attribute is deprecated
 //~| NOTE see issue #44136
diff --git a/src/test/rustdoc-ui/deprecated-attrs.stderr b/src/test/rustdoc-ui/deprecated-attrs.stderr
index b855cedf522..45b20ce70ef 100644
--- a/src/test/rustdoc-ui/deprecated-attrs.stderr
+++ b/src/test/rustdoc-ui/deprecated-attrs.stderr
@@ -1,8 +1,7 @@
-warning: the `passes` flag is deprecated
+warning: the `passes` flag no longer functions
    |
    = note: see issue #44136 <https://github.com/rust-lang/rust/issues/44136> for more information
-
-warning: ignoring unknown pass `unknown-pass`
+   = help: you may want to use --document-private-items
 
 warning: the `#![doc(no_default_passes)]` attribute is deprecated
   --> $DIR/deprecated-attrs.rs:5:8
@@ -11,7 +10,7 @@ LL | #![doc(no_default_passes)]
    |        ^^^^^^^^^^^^^^^^^
    |
    = note: see issue #44136 <https://github.com/rust-lang/rust/issues/44136> for more information
-   = help: you may want to use `#![doc(document_private_items)]`
+   = help: `#![doc(no_default_passes)]` no longer functions; you may want to use `#![doc(document_private_items)]`
 
 warning: the `#![doc(passes = "...")]` attribute is deprecated
   --> $DIR/deprecated-attrs.rs:9:8
@@ -20,17 +19,10 @@ LL | #![doc(passes = "collapse-docs unindent-comments")]
    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: see issue #44136 <https://github.com/rust-lang/rust/issues/44136> for more information
-
-warning: ignoring unknown pass `collapse-docs`
-  --> $DIR/deprecated-attrs.rs:9:17
-   |
-LL | #![doc(passes = "collapse-docs unindent-comments")]
-   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: the `collapse-docs` pass was removed in #80261 <https://github.com/rust-lang/rust/pull/80261>
+   = help: `#![doc(passes = "...")]` no longer functions; you may want to use `#![doc(document_private_items)]`
 
 warning: the `#![doc(plugins = "...")]` attribute is deprecated
-  --> $DIR/deprecated-attrs.rs:14:8
+  --> $DIR/deprecated-attrs.rs:13:8
    |
 LL | #![doc(plugins = "xxx")]
    |        ^^^^^^^^^^^^^^^
@@ -38,5 +30,5 @@ LL | #![doc(plugins = "xxx")]
    = note: see issue #44136 <https://github.com/rust-lang/rust/issues/44136> for more information
    = warning: `#![doc(plugins = "...")]` no longer functions; see CVE-2018-1000622 <https://nvd.nist.gov/vuln/detail/CVE-2018-1000622>
 
-warning: 5 warnings emitted
+warning: 3 warnings emitted
 
diff --git a/src/test/rustdoc-ui/issue-91713.rs b/src/test/rustdoc-ui/issue-91713.rs
index b7057d868c2..610bbf11d9c 100644
--- a/src/test/rustdoc-ui/issue-91713.rs
+++ b/src/test/rustdoc-ui/issue-91713.rs
@@ -1,3 +1,3 @@
 // check-pass
 // compile-flags: --passes list
-// error-pattern: the `passes` flag is deprecated
+// error-pattern: the `passes` flag no longer functions
diff --git a/src/test/rustdoc-ui/issue-91713.stderr b/src/test/rustdoc-ui/issue-91713.stderr
index 70c22b3c01e..44ead7a1de2 100644
--- a/src/test/rustdoc-ui/issue-91713.stderr
+++ b/src/test/rustdoc-ui/issue-91713.stderr
@@ -1,4 +1,5 @@
-warning: the `passes` flag is deprecated
+warning: the `passes` flag no longer functions
    |
    = note: see issue #44136 <https://github.com/rust-lang/rust/issues/44136> for more information
+   = help: you may want to use --document-private-items
 
diff --git a/src/test/rustdoc/inline_local/glob-extern-no-defaults.rs b/src/test/rustdoc/inline_local/glob-extern-document-private-items.rs
index 55c75dfe27b..a2f0d65efce 100644
--- a/src/test/rustdoc/inline_local/glob-extern-no-defaults.rs
+++ b/src/test/rustdoc/inline_local/glob-extern-document-private-items.rs
@@ -1,4 +1,4 @@
-// compile-flags: --no-defaults
+// compile-flags: --document-private-items
 
 #![crate_name = "foo"]
 
diff --git a/src/test/rustdoc/inline_local/glob-private-no-defaults.rs b/src/test/rustdoc/inline_local/glob-private-document-private-items.rs
index ac854ac4320..f16d21ecdb1 100644
--- a/src/test/rustdoc/inline_local/glob-private-no-defaults.rs
+++ b/src/test/rustdoc/inline_local/glob-private-document-private-items.rs
@@ -1,4 +1,4 @@
-// compile-flags: --no-defaults
+// compile-flags: --document-private-items
 
 #![crate_name = "foo"]
 
diff --git a/src/test/rustdoc/issue-15347.rs b/src/test/rustdoc/issue-15347.rs
index fa67da840b7..e93d7401168 100644
--- a/src/test/rustdoc/issue-15347.rs
+++ b/src/test/rustdoc/issue-15347.rs
@@ -1,4 +1,4 @@
-// compile-flags: --no-defaults --passes collapse-docs --passes unindent-comments
+// compile-flags: -Z unstable-options --document-hidden-items
 
 // @has issue_15347/fn.foo.html
 #[doc(hidden)]
diff --git a/src/test/rustdoc/issue-42875.rs b/src/test/rustdoc/issue-42875.rs
deleted file mode 100644
index 292c2077688..00000000000
--- a/src/test/rustdoc/issue-42875.rs
+++ /dev/null
@@ -1,13 +0,0 @@
-// compile-flags: --no-defaults
-
-#![crate_name = "foo"]
-
-// @has foo/a/index.html '//code' 'use *;'
-mod a {
-    use *;
-}
-
-// @has foo/b/index.html '//code' 'pub use *;'
-pub mod b {
-    pub use *;
-}
diff --git a/src/test/rustdoc/no-compiler-reexport.rs b/src/test/rustdoc/no-compiler-reexport.rs
index 6d50325fed5..d28fdf87b77 100644
--- a/src/test/rustdoc/no-compiler-reexport.rs
+++ b/src/test/rustdoc/no-compiler-reexport.rs
@@ -1,7 +1,7 @@
-// compile-flags: --no-defaults
+// compile-flags: -Z unstable-options --document-hidden-items --document-private-items
 
 #![crate_name = "foo"]
 
-// @has 'foo/index.html' '//code' 'extern crate std;'
-// @!has 'foo/index.html' '//code' 'use std::prelude::v1::*;'
+// @!has 'foo/index.html' '//code' 'extern crate std;'
+// @!has 'foo/index.html' '//code' 'use std::prelude'
 pub struct Foo;