Rollup merge of rust-lang#130110 - onur-ozkan:configurable-dist-vendor, r=Kobzol,Mark-Simulacrum

make dist vendoring configurable

Adds a new option `dist.vendor` which allows people to decide whether to vendor dependencies for their custom distribution tarball builds. Note that our builds will not be affected, as the default for this option is the same as the previous vendoring condition from bootstrap.

Author: Zalathar

config.example.toml

@@ -942,3 +942,6 @@
 # Copy the linker, DLLs, and various libraries from MinGW into the Rust toolchain.
 # Only applies when the host or target is pc-windows-gnu.
 #include-mingw-linker = true
+
+# Whether to vendor dependencies for the dist tarball.
+#vendor = if "is a tarball source" || "is a git repository" { true } else { false }

src/bootstrap/src/core/build_steps/dist.rs

@@ -1011,11 +1011,7 @@ impl Step for PlainSourceTarball {
         write_git_info(builder.rust_info().info(), plain_dst_src);
         write_git_info(builder.cargo_info.info(), &plain_dst_src.join("./src/tools/cargo"));
 
-        // If we're building from git or tarball sources, we need to vendor
-        // a complete distribution.
-        if builder.rust_info().is_managed_git_subrepository()
-            || builder.rust_info().is_from_tarball()
-        {
+        if builder.config.dist_vendor {
             builder.require_and_update_all_submodules();
 
             // Vendor all Cargo dependencies

src/bootstrap/src/core/config/config.rs

@@ -308,6 +308,7 @@ pub struct Config {
     pub dist_compression_formats: Option<Vec<String>>,
     pub dist_compression_profile: String,
     pub dist_include_mingw_linker: bool,
+    pub dist_vendor: bool,
 
     // libstd features
     pub backtrace: bool, // support for RUST_BACKTRACE
@@ -933,6 +934,7 @@ define_config! {
         compression_formats: Option<Vec<String>> = "compression-formats",
         compression_profile: Option<String> = "compression-profile",
         include_mingw_linker: Option<bool> = "include-mingw-linker",
+        vendor: Option<bool> = "vendor",
     }
 }
 
@@ -2028,13 +2030,19 @@ impl Config {
                 compression_formats,
                 compression_profile,
                 include_mingw_linker,
+                vendor,
             } = dist;
             config.dist_sign_folder = sign_folder.map(PathBuf::from);
             config.dist_upload_addr = upload_addr;
             config.dist_compression_formats = compression_formats;
             set(&mut config.dist_compression_profile, compression_profile);
             set(&mut config.rust_dist_src, src_tarball);
-            set(&mut config.dist_include_mingw_linker, include_mingw_linker)
+            set(&mut config.dist_include_mingw_linker, include_mingw_linker);
+            config.dist_vendor = vendor.unwrap_or_else(|| {
+                // If we're building from git or tarball sources, enable it by default.
+                config.rust_info.is_managed_git_subrepository()
+                    || config.rust_info.is_from_tarball()
+            });
         }
 
         if let Some(r) = rustfmt {

src/bootstrap/src/utils/change_tracker.rs

@@ -255,4 +255,9 @@ pub const CONFIG_CHANGE_HISTORY: &[ChangeInfo] = &[
         severity: ChangeSeverity::Warning,
         summary: "`download-ci-llvm = true` now checks if CI llvm is available and has become the default for the compiler profile",
     },
+    ChangeInfo {
+        change_id: 130110,
+        severity: ChangeSeverity::Info,
+        summary: "New option `dist.vendor` added to control whether bootstrap should vendor dependencies for dist tarball.",
+    },
 ];