Rollup merge of rust-lang#137862 - mtoner23:print-help, r=nnethercote

ensure we always print all --print options in help

Closes rust-lang#137853
Refactors the PRINT_KINDS map into a public const so we always print every option for print. the list is quite long now, and idk if long term we want to keep printing all these options from --help.

Author: matthiaskrgr

compiler/rustc_session/src/config.rs

@@ -42,6 +42,32 @@ mod cfg;
 mod native_libs;
 pub mod sigpipe;
 
+pub const PRINT_KINDS: &[(&str, PrintKind)] = &[
+    // tidy-alphabetical-start
+    ("all-target-specs-json", PrintKind::AllTargetSpecs),
+    ("calling-conventions", PrintKind::CallingConventions),
+    ("cfg", PrintKind::Cfg),
+    ("check-cfg", PrintKind::CheckCfg),
+    ("code-models", PrintKind::CodeModels),
+    ("crate-name", PrintKind::CrateName),
+    ("deployment-target", PrintKind::DeploymentTarget),
+    ("file-names", PrintKind::FileNames),
+    ("host-tuple", PrintKind::HostTuple),
+    ("link-args", PrintKind::LinkArgs),
+    ("native-static-libs", PrintKind::NativeStaticLibs),
+    ("relocation-models", PrintKind::RelocationModels),
+    ("split-debuginfo", PrintKind::SplitDebuginfo),
+    ("stack-protector-strategies", PrintKind::StackProtectorStrategies),
+    ("sysroot", PrintKind::Sysroot),
+    ("target-cpus", PrintKind::TargetCPUs),
+    ("target-features", PrintKind::TargetFeatures),
+    ("target-libdir", PrintKind::TargetLibdir),
+    ("target-list", PrintKind::TargetList),
+    ("target-spec-json", PrintKind::TargetSpec),
+    ("tls-models", PrintKind::TlsModels),
+    // tidy-alphabetical-end
+];
+
 /// The different settings that the `-C strip` flag can have.
 #[derive(Clone, Copy, PartialEq, Hash, Debug)]
 pub enum Strip {
@@ -1508,6 +1534,13 @@ The default is {DEFAULT_EDITION} and the latest stable edition is {LATEST_STABLE
     )
 });
 
+static PRINT_KINDS_STRING: LazyLock<String> = LazyLock::new(|| {
+    format!(
+        "[{}]",
+        PRINT_KINDS.iter().map(|(name, _)| format!("{name}")).collect::<Vec<_>>().join("|")
+    )
+});
+
 /// Returns all rustc command line options, including metadata for
 /// each option, such as whether the option is stable.
 pub fn rustc_optgroups() -> Vec<RustcOptGroup> {
@@ -1568,10 +1601,7 @@ pub fn rustc_optgroups() -> Vec<RustcOptGroup> {
             "",
             "print",
             "Compiler information to print on stdout",
-            "[crate-name|file-names|sysroot|target-libdir|cfg|check-cfg|calling-conventions|\
-             target-list|target-cpus|target-features|relocation-models|code-models|\
-             tls-models|target-spec-json|all-target-specs-json|native-static-libs|\
-             stack-protector-strategies|link-args|deployment-target]",
+            &PRINT_KINDS_STRING,
         ),
         opt(Stable, FlagMulti, "g", "", "Equivalent to -C debuginfo=2", ""),
         opt(Stable, FlagMulti, "O", "", "Equivalent to -C opt-level=3", ""),
@@ -1999,32 +2029,6 @@ fn collect_print_requests(
         cg.target_feature = String::new();
     }
 
-    const PRINT_KINDS: &[(&str, PrintKind)] = &[
-        // tidy-alphabetical-start
-        ("all-target-specs-json", PrintKind::AllTargetSpecs),
-        ("calling-conventions", PrintKind::CallingConventions),
-        ("cfg", PrintKind::Cfg),
-        ("check-cfg", PrintKind::CheckCfg),
-        ("code-models", PrintKind::CodeModels),
-        ("crate-name", PrintKind::CrateName),
-        ("deployment-target", PrintKind::DeploymentTarget),
-        ("file-names", PrintKind::FileNames),
-        ("host-tuple", PrintKind::HostTuple),
-        ("link-args", PrintKind::LinkArgs),
-        ("native-static-libs", PrintKind::NativeStaticLibs),
-        ("relocation-models", PrintKind::RelocationModels),
-        ("split-debuginfo", PrintKind::SplitDebuginfo),
-        ("stack-protector-strategies", PrintKind::StackProtectorStrategies),
-        ("sysroot", PrintKind::Sysroot),
-        ("target-cpus", PrintKind::TargetCPUs),
-        ("target-features", PrintKind::TargetFeatures),
-        ("target-libdir", PrintKind::TargetLibdir),
-        ("target-list", PrintKind::TargetList),
-        ("target-spec-json", PrintKind::TargetSpec),
-        ("tls-models", PrintKind::TlsModels),
-        // tidy-alphabetical-end
-    ];
-
     // We disallow reusing the same path in multiple prints, such as `--print
     // cfg=output.txt --print link-args=output.txt`, because outputs are printed
     // by disparate pieces of the compiler, and keeping track of which files

tests/run-make/rustc-help/help-v.stdout

@@ -29,7 +29,7 @@ Options:
         --emit [asm|llvm-bc|llvm-ir|obj|metadata|link|dep-info|mir]
                         Comma separated list of types of output for the
                         compiler to emit
-        --print [crate-name|file-names|sysroot|target-libdir|cfg|check-cfg|calling-conventions|target-list|target-cpus|target-features|relocation-models|code-models|tls-models|target-spec-json|all-target-specs-json|native-static-libs|stack-protector-strategies|link-args|deployment-target]
+        --print [all-target-specs-json|calling-conventions|cfg|check-cfg|code-models|crate-name|deployment-target|file-names|host-tuple|link-args|native-static-libs|relocation-models|split-debuginfo|stack-protector-strategies|sysroot|target-cpus|target-features|target-libdir|target-list|target-spec-json|tls-models]
                         Compiler information to print on stdout
     -g                  Equivalent to -C debuginfo=2
     -O                  Equivalent to -C opt-level=3

tests/run-make/rustc-help/help.stdout

@@ -29,7 +29,7 @@ Options:
         --emit [asm|llvm-bc|llvm-ir|obj|metadata|link|dep-info|mir]
                         Comma separated list of types of output for the
                         compiler to emit
-        --print [crate-name|file-names|sysroot|target-libdir|cfg|check-cfg|calling-conventions|target-list|target-cpus|target-features|relocation-models|code-models|tls-models|target-spec-json|all-target-specs-json|native-static-libs|stack-protector-strategies|link-args|deployment-target]
+        --print [all-target-specs-json|calling-conventions|cfg|check-cfg|code-models|crate-name|deployment-target|file-names|host-tuple|link-args|native-static-libs|relocation-models|split-debuginfo|stack-protector-strategies|sysroot|target-cpus|target-features|target-libdir|target-list|target-spec-json|tls-models]
                         Compiler information to print on stdout
     -g                  Equivalent to -C debuginfo=2
     -O                  Equivalent to -C opt-level=3

tests/ui/invalid-compile-flags/print-without-arg.stderr

@@ -1,5 +1,5 @@
 error: Argument to option 'print' missing
        Usage:
-           --print [crate-name|file-names|sysroot|target-libdir|cfg|check-cfg|calling-conventions|target-list|target-cpus|target-features|relocation-models|code-models|tls-models|target-spec-json|all-target-specs-json|native-static-libs|stack-protector-strategies|link-args|deployment-target]
+           --print [all-target-specs-json|calling-conventions|cfg|check-cfg|code-models|crate-name|deployment-target|file-names|host-tuple|link-args|native-static-libs|relocation-models|split-debuginfo|stack-protector-strategies|sysroot|target-cpus|target-features|target-libdir|target-list|target-spec-json|tls-models]
                                Compiler information to print on stdout