archiver.bbclass: Drop tarfile module to improve performance

* The tarfile module doesn't support xz options or environment varible
  XZ_DEFAULTS, this makes do_ar_patched incrediblely slow when the file is
  large, for example, chromium-x11 is about 3GB:
  - "bitbake chromium-x11 -car_patched" hasn't been done after 3 hours on my
     host, I checked the partial tar.xz file is only 1.5GB, so maybe more than 6
     hours is required to complete the task.

  - Now only less than 4 minutes is needed on the same host.

* Need add xz to HOSTTOOLS when archiver.bbclass is enabled and compression is xz.

(From OE-Core rev: 6548354f049b173e8d443bc547d35c9d9fc05259)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf
index 95d4bd95c8..6f180d18b0 100644
--- a/meta/conf/bitbake.conf
+++ b/meta/conf/bitbake.conf
@@ -529,6 +529,9 @@ HOSTTOOLS += " \
 # Tools needed to run testimage runtime image testing
 HOSTTOOLS += "${@'ip ping ps scp ssh stty' if (bb.utils.contains_any('IMAGE_CLASSES', 'testimage testsdk', True, False, d) or any(x in (d.getVar("BBINCLUDED") or "") for x in ["testimage.bbclass", "testsdk.bbclass"])) else ''}"
 
+# Used by archiver.bbclass when compression is xz
+HOSTTOOLS += "${@'xz' if (('archiver.bbclass' in (d.getVar('BBINCLUDED') or '')) and (d.getVarFlag('ARCHIVER_MODE', 'compression') == 'xz')) else ''}"
+
 # Link to these if present
 HOSTTOOLS_NONFATAL += "aws gcc-ar gpg gpg-agent ld.bfd ld.gold nc pigz sftp socat ssh sudo"