[eclipse-yocto] [oxygen][PATCH v2 1/4] setup.sh: add P2 debug trace option

[Chin Huat Ang]

Add new option for turning on P2 debug traces to enable troubleshooting
P2 mirrors related issues such as when downloading installation units
(IUs). These trace options are documented here:

  https://wiki.eclipse.org/Equinox/p2/TracingOptions

Signed-off-by: Chin Huat Ang <chin.huat.ang at intel.com>
---
 scripts/debug.ini | 2 ++
 scripts/setup.sh  | 6 ++++++
 2 files changed, 8 insertions(+)
 create mode 100644 scripts/debug.ini

diff --git a/scripts/debug.ini b/scripts/debug.ini
new file mode 100644
index 0000000..ee240af
--- /dev/null
+++ b/scripts/debug.ini
@@ -0,0 +1,2 @@
+org.eclipse.equinox.p2.core/debug=true
+org.eclipse.equinox.p2.core/artifacts/mirrors=true
diff --git a/scripts/setup.sh b/scripts/setup.sh
index 58a60d1..1010235 100755
--- a/scripts/setup.sh
+++ b/scripts/setup.sh
@@ -209,6 +209,9 @@ check_local_version()
   return 0
 }
 
+# Don't enable P2 debug traces by default
+P2_INSTALL_DEBUG=${P2_INSTALL_DEBUG:=0}
+
 # install a feature with version requirement [min, max]
 #$1: reporsitory url
 #$2: featureId
@@ -242,8 +245,11 @@ update_feature_remote()
   fi
 
   [ "x$installIU" = "x" ] && err_exit 1 "Can NOT find candidates of $2 version($3, $4) at $1!"
+  [ "$P2_INSTALL_DEBUG" == "1" ] && DEBUG_OPTS="-debug ./debug.ini"
+
   installIU="$2/$installIU"
   java ${PROXY_PARAM} -jar ${LAUNCHER} \
+    $DEBUG_OPTS \
     -application org.eclipse.equinox.p2.director \
     -destination ./eclipse \
     -profile SDKProfile \
-- 
2.7.4