Add --skip-make to replace Soong's blueprint wrapper with soong_ui

This way we only have one way to start a build, which always has logging
/ tracing / etc, even if we don't need Kati.

There's two ways to use this:

As a direct replacement for mkdir out; cd out; ../bootstrap.bash;
./soong -- as long as --skip-make is always passed, we'll never run
Kati, and Soong will run outside of it's "make" mode. This preserves
most of the speed, and allows full user control over the Soong
configuration.

A (experimental, dangerous) way to temporarily bypass the product
variable and kati steps of a build. As long as a user is sure that
nothing has changed from the last build, and they know exactly which
Ninja targets they want to build (which may not be the same as the
arguments normally passed to 'm'), this can lead to shorter build
startup times.

Test: rm -rf out; m --skip-make libc
Test: rm -rf out; m libc; m --skip-make libc
Test: rm -rf out; mkdir out; cd out; ../bootstrap.bash; ./soong libc
Test: build/soong/scripts/build-ndk-prebuilts.sh
Change-Id: Ic0f91167b5779dba3f248a379fbaac67a75a946e

1 files changed, 8 insertions, 0 deletions

diff --git a/soong.bash b/soong.bash
index 1dbf4e4e..d832eb26 100755
--- a/soong.bash
+++ b/soong.bash
@@ -5,6 +5,14 @@ set -e
 # Switch to the build directory
 cd $(dirname "${BASH_SOURCE[0]}")
 
+if [ -z "$NO_DEPRECATION_WARNING" ]; then
+    echo '== WARNING: bootstrap.bash & ./soong are deprecated ==' >&2
+    echo 'Use `m --skip-make` with a standalone OUT_DIR instead.' >&2
+    echo 'Without envsetup.sh, use:' >&2
+    echo '  build/soong/soong_ui.bash --make-mode --skip-make' >&2
+    echo '======================================================' >&2
+fi
+
 # The source directory path and operating system will get written to
 # .soong.bootstrap by the bootstrap script.