tcwg-upstream2gerrit.sh: Add 'filter' parameter.

If false (default), send the patch(es) for review if they apply.

It true, only ask review if the patch(es) pass the filter: check if
the patch(es) contain anything dealing with arm, thumb, or aarch64.

Change-Id: I7dd0a9f175396bf898cdf9a696f275dff881fda7

1 files changed, 31 insertions, 1 deletions

diff --git a/tcwg-upstream2gerrit.sh b/tcwg-upstream2gerrit.sh
index fd35c138..3a909b7d 100755
--- a/tcwg-upstream2gerrit.sh
+++ b/tcwg-upstream2gerrit.sh
@@ -8,6 +8,7 @@ branch="${branch:-master}"
 patches="${patches:-last}"
 project="${project:-gcc}"
 squash="${squash:-false}"
+filter="${filter:-false}"
 
 # Jenkins doesn't define variables when parameter value is empty (like cflags),
 # so enable "set -u" only after above binding of variables.
@@ -64,7 +65,7 @@ case "$project" in
 esac
 
 patch_file=$(mktemp)
-trap "rm -f $patch_file" EXIT
+trap "rm -f $patch_file /tmp/mydiff.$$" EXIT
 
 count="0"
 for patch in $patches; do
@@ -104,6 +105,35 @@ for patch in $patches; do
     count=$(($count+1))
 done
 
+# Apply the filter once the patch series has been applied, to decide
+# whether we actually want review and validation
+keepit=true
+if $filter; then
+    keepit=false
+    git diff HEAD~$count..HEAD > /tmp/mydiff.$$
+
+    # Keep commits impacting ARM or AArch64
+    wanted1=0
+    # Search the exact words arm, thumb or aarch64
+    egrep '^[-+]' /tmp/mydiff.$$ | egrep -w -i 'arm|thumb|aarch64' || wanted1=$?
+    wanted2=0
+    # Search the same strings with '_' prefix or suffix, excluding string with 'parm'
+    egrep '^[-+]' /tmp/mydiff.$$ | egrep -i '_arm|arm_|_thumb|thumb_|_aarch64|aarch64_' | grep -v -i 'parm' || wanted2=$?
+    if [ $wanted1 -eq 0 -o $wanted2 -eq 0 ]
+    then
+	keepit=true
+    else
+	# We could keep commits from ARM, Linaro, or whitelist if we had a ChangeLog
+	echo "Cannot filter authors without a ChangeLog"
+	keepit=false
+    fi
+fi
+
+if ! $keepit; then
+    echo "The filter decided to skip this patch"
+    exit 0
+fi
+
 if $squash; then
     git reset --soft HEAD~$count
     git commit -m "Patches: $patches"