Add a build flag to enable dev channel features.

This CL adds a build flag `--define CHANNEL=dev` to enable dev channel features.

When this flag is specified, the `DEV_CHANNEL=1` macro is defined.

PiperOrigin-RevId: 659595286

src/.bazelrc

@@ -10,9 +10,11 @@ common:prod_android --config=compiler_gcc_like
 common:macos --config=compiler_gcc_like
 common:oss_macos --config=compiler_gcc_like
 common:prod_macos --config=compiler_gcc_like
+common:prod_macos_dev --config=prod_macos --config=dev_channel
 common:windows --config=compiler_msvc_like
 common:oss_windows --config=compiler_msvc_like
 common:prod_windows --config=compiler_msvc_like
+common:prod_windows_dev --config=prod_windows --config=dev_channel
 
 # Make sure we set -std=c++20 that may affect ABI across all the compilation targets.
 # https://github.com/abseil/abseil-cpp/blob/master/FAQ.md#what-is-abi-and-why-dont-you-recommend-using-a-pre-compiled-version-of-abseil
@@ -27,6 +29,9 @@ build:compiler_msvc_like --copt "/utf-8" --host_copt "/utf-8"
 build:compiler_msvc_like --cxxopt "/J" --host_cxxopt "/J"
 build:compiler_msvc_like --cxxopt "/utf-8" --host_cxxopt "/utf-8"
 
+# Dev channel
+build:dev_channel --define CHANNEL=dev
+
 # Linux
 build:linux --define TARGET=oss_linux --copt "-fPIC"
 build:linux --build_tag_filters=-nolinux

src/BUILD.bazel

@@ -56,6 +56,13 @@ config_setting(
     visibility = ["//visibility:private"],
 )
 
+config_setting(
+    name = "dev_channel",
+    values = {
+        "define": "CHANNEL=dev",
+    },
+)
+
 alias(
     name = "compiler",
     actual = BAZEL_TOOLS_PREFIX + "//tools/cpp:compiler",
@@ -157,7 +164,10 @@ cc_library(
     ) + mozc_select_enable_supplemental_model([
     ]) + mozc_select_enable_usage_rewriter(
         off = ["NO_USAGE_REWRITER"],
-    ),
+    ) + select({
+        ":dev_channel": ["CHANNEL_DEV=1"],
+        "//conditions:default": [],
+    }),
 )
 
 bzl_library(

src/mac/BUILD.bazel

@@ -44,6 +44,12 @@ load(
 
 package(default_visibility = ["//:__subpackages__"])
 
+# BUILD_TYPE_SELECT is treated as a function, but not a string. This cannot be a value of join().
+BUILD_TYPE_SELECT = select({
+    "//:dev_channel": "dev",
+    "//conditions:default": "stable",
+})
+
 mozc_macos_application(
     name = "mozc_macos",
     additional_contents = mozc_select(
@@ -380,8 +386,8 @@ genrule(
         "$(location //build_tools:tweak_macinstaller_script)",
         " --output $@",
         " --input $<",
-        " --build_type dev",  # or stable.
-    ]),
+        " --build_type ",
+    ]) + BUILD_TYPE_SELECT,  # "dev" or "stable".
     tools = ["//build_tools:tweak_macinstaller_script"],
 )
 
@@ -397,8 +403,8 @@ genrule(
         " --output $@",
         " --input $<",
         " --version_file $(location //base:mozc_version_txt)",
-        " --build_type dev",  # or stable.
-    ]),
+        " --build_type ",
+    ]) + BUILD_TYPE_SELECT,  # "dev" or "stable".
     tools = [
         "//base:mozc_version_txt",
         "//build_tools:tweak_macinstaller_script",
@@ -505,13 +511,16 @@ genrule(
         prod_macos = ["installer/Mozc_template.pkgproj"],
     ),
     outs = ["Mozc_Packages.pkg"],
-    cmd = ("$(location :build_installer) --input $(location :tweaked_installer_files) --output $@" +
-           " --pkgproj_command $(location //build_tools:tweak_pkgproj)" +
-           " --pkgproj_input $(location installer/Mozc_template.pkgproj)" +
-           " --pkgproj_output installer.pkgproj" +
-           " --version_file $(location //base:mozc_version_txt)" +
-           " --auto_updater_dir " + AUTO_UPDATER_DIR +
-           " --build_type dev"),  # or stable
+    cmd = " ".join([
+        "$(location :build_installer)",
+        "--input $(location :tweaked_installer_files) --output $@" +
+        "--pkgproj_command $(location //build_tools:tweak_pkgproj)",
+        "--pkgproj_input $(location installer/Mozc_template.pkgproj)",
+        "--pkgproj_output installer.pkgproj",
+        "--version_file $(location //base:mozc_version_txt)",
+        "--auto_updater_dir " + AUTO_UPDATER_DIR,
+        "--build_type ",
+    ]) + BUILD_TYPE_SELECT,  # "dev" or "stable"
     tags = ["manual"],
     tools = [
         ":build_installer",
@@ -529,8 +538,8 @@ genrule(
         "$(location //build_tools:tweak_macinstaller_script)",
         "--output $@",
         "--input $(SRCS)",
-        "--build_type dev",  # or stable
-    ]),
+        "--build_type ",
+    ]) + BUILD_TYPE_SELECT,  # "dev" or "stable"
     tags = ["manual"],
     tools = [
         "//build_tools:tweak_macinstaller_script",

src/win32/installer/BUILD.bazel

@@ -28,3 +28,6 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 # Build rules for the Windows installer.
+
+# Note, omaha_channel_type can be controlled by //:dev_channel
+# See BUILD_TYPE_SELECT in mac/BUILD as an example.