package command: Enable zstd compression by default.

Note that zstd-compressed packages cannot be installed unless the
running system can already read them, even as part of a system
update transaction. This has been possible for some months now,
but if one has an older EFI bootloader, you may need to upgrade it.

Change-Id: I9e561459477723e498a871ee5c5caad560861b79
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4663
Reviewed-by: Adrien Destugues <[email protected]>
Reviewed-by: waddlesplash <[email protected]>
Tested-by: Commit checker robot <[email protected]>

src/bin/package/Jamfile

@@ -2,6 +2,10 @@ SubDir HAIKU_TOP src bin package ;
 
 UsePrivateHeaders kernel libroot shared storage support ;
 
+if [ FIsBuildFeatureEnabled zstd ] {
+	SubDirC++Flags -DZSTD_DEFAULT ;
+}
+
 BinCommand package :
 	command_add.cpp
 	command_checksum.cpp

src/bin/package/package.cpp

@@ -131,7 +131,11 @@ parse_compression_argument(const char* arg)
 {
 	if (arg == NULL) {
 		// Default compression method.
+#ifdef ZSTD_DEFAULT
+		return BPackageKit::BHPKG::B_HPKG_COMPRESSION_ZSTD;
+#else
 		return BPackageKit::BHPKG::B_HPKG_COMPRESSION_ZLIB;
+#endif
 	}
 
 	if (strcmp(arg, "zstd") == 0) {

src/tools/package/Jamfile

@@ -6,6 +6,10 @@ SEARCH_SOURCE += [ FDirName $(HAIKU_TOP) src bin package ] ;
 
 USES_BE_API on <build>package = true ;
 
+if [ FIsBuildFeatureEnabled zstd ] {
+	SubDirC++Flags -DZSTD_DEFAULT ;
+}
+
 BuildPlatformMain <build>package :
 	command_add.cpp
 	command_checksum.cpp