Add status buildinfo (#10896)

This can be used to get some information on how fish was built - the
version, the build system, the operating system and architecture, the
features.

(cherry picked from commit 6f9ca42a30)

build.rs

@@ -29,6 +29,11 @@ fn main() {
             .unwrap(),
     );
 
+    // Some build info
+    rsconf::set_env_value("BUILD_TARGET_TRIPLE", &env::var("TARGET").unwrap());
+    rsconf::set_env_value("BUILD_HOST_TRIPLE", &env::var("HOST").unwrap());
+    rsconf::set_env_value("BUILD_PROFILE", &env::var("PROFILE").unwrap());
+
     let version = &get_version(&env::current_dir().unwrap());
     // Per https://doc.rust-lang.org/cargo/reference/build-scripts.html#inputs-to-the-build-script,
     // the source directory is the current working directory of the build script

cmake/Rust.cmake

@@ -49,6 +49,8 @@ set(VARS_FOR_CARGO
     "PREFIX=${CMAKE_INSTALL_PREFIX}"
     # Temporary hack to propogate CMake flags/options to build.rs.
     "CMAKE_WITH_GETTEXT=${CMAKE_WITH_GETTEXT}"
+    # Cheesy so we can tell cmake was used to build
+    "CMAKE=1"
     "DOCDIR=${CMAKE_INSTALL_FULL_DOCDIR}"
     "DATADIR=${CMAKE_INSTALL_FULL_DATADIR}"
     "SYSCONFDIR=${CMAKE_INSTALL_FULL_SYSCONFDIR}"

doc_src/cmds/status.rst

@@ -29,6 +29,7 @@ Synopsis
     status job-control CONTROL_TYPE
     status features
     status test-feature FEATURE
+    status buildinfo
 
 Description
 -----------
@@ -97,6 +98,10 @@ The following operations (subcommands) are available:
 **test-feature** *FEATURE*
     Returns 0 when FEATURE is enabled, 1 if it is disabled, and 2 if it is not recognized.
 
+**buildinfo**
+    This prints information on how fish was build - which architecture, which build system or profile was used, etc.
+    This is mainly useful for debugging.
+
 Notes
 -----
 

src/builtins/status.rs

@@ -57,12 +57,14 @@ enum StatusCmd {
     STATUS_STACK_TRACE,
     STATUS_TEST_FEATURE,
     STATUS_CURRENT_COMMANDLINE,
+    STATUS_BUILDINFO,
 }
 
 str_enum!(
     StatusCmd,
     (STATUS_BASENAME, "basename"),
     (STATUS_BASENAME, "current-basename"),
+    (STATUS_BUILDINFO, "buildinfo"),
     (STATUS_CURRENT_CMD, "current-command"),
     (STATUS_CURRENT_COMMANDLINE, "current-commandline"),
     (STATUS_DIRNAME, "current-dirname"),
@@ -420,6 +422,45 @@ pub fn status(parser: &Parser, streams: &mut IoStreams, args: &mut [&wstr]) -> O
             }
             return retval;
         }
+        STATUS_BUILDINFO => {
+            let version = str2wcstring(crate::BUILD_VERSION.as_bytes());
+            let target = str2wcstring(env!("BUILD_TARGET_TRIPLE").as_bytes());
+            let host = str2wcstring(env!("BUILD_HOST_TRIPLE").as_bytes());
+            let profile = str2wcstring(env!("BUILD_PROFILE").as_bytes());
+            streams.out.append(L!("Build system: "));
+            let buildsystem = match option_env!("CMAKE") {
+                Some("1") => "CMake",
+                _ => "Cargo",
+            };
+            streams.out.appendln(str2wcstring(buildsystem.as_bytes()));
+            streams.out.append(L!("Version: "));
+            streams.out.appendln(version);
+            if target == host {
+                streams.out.append(L!("Target (and host): "));
+                streams.out.appendln(target);
+            } else {
+                streams.out.append(L!("Target: "));
+                streams.out.appendln(target);
+                streams.out.append(L!("Host: "));
+                streams.out.appendln(host);
+            }
+            streams.out.append(L!("Profile: "));
+            streams.out.appendln(profile);
+            streams.out.append(L!("Features: "));
+            let features: &[&str] = &[
+                #[cfg(gettext)]
+                "gettext",
+                #[cfg(feature = "installable")]
+                "installable",
+                #[cfg(target_feature = "crt-static")]
+                "crt-static",
+            ];
+            streams
+                .out
+                .appendln(str2wcstring(features.join(" ").as_bytes()));
+            streams.out.appendln("");
+            return STATUS_CMD_OK;
+        }
         ref s => {
             if !args.is_empty() {
                 streams.err.append(wgettext_fmt!(
@@ -558,7 +599,10 @@ pub fn status(parser: &Parser, streams: &mut IoStreams, args: &mut [&wstr]) -> O
                         streams.out.appendln(path);
                     }
                 }
-                STATUS_SET_JOB_CONTROL | STATUS_FEATURES | STATUS_TEST_FEATURE => {
+                STATUS_BUILDINFO
+                | STATUS_SET_JOB_CONTROL
+                | STATUS_FEATURES
+                | STATUS_TEST_FEATURE => {
                     unreachable!("")
                 }
             }

tests/checks/buildinfo.fish

@@ -0,0 +1,15 @@
+#RUN: %fish %s
+# Example output:
+# Build system: CMake
+# Version: 3.7.1-2573-gea8301631-dirty
+# Target (and host): x86_64-unknown-linux-gnu
+# Profile: release
+# Features: gettext
+
+status buildinfo | grep -v 'Host:'
+# CHECK: Build system: {{CMake|Cargo}}
+# CHECK: Version: {{.+}}
+# (this could be "Target (and Host)" or "Target:" and a separate line "Host:")
+# CHECK: Target{{.*}}: {{.+}}
+# CHECK: Profile: {{release|debug}}
+# CHECK: Features:{{.*}}