[dpdk-ci] [PATCH 7/9] tools: filter new patchwork IDs by date

[Ali Alnubani <alialnu@oss.nvidia.com>]

API resource IDs are guaranteed to be unique, but they aren't guaranteed
to have no gaps, for example, the following series IDs are
nonexistent: 16157, 17181, 18235.
Filtering by the date since the last check is necessary to later
add support for fetching new series IDs in addition to patch IDs.

Instead of requiring a file that contains the next patch ID,
a file containing the timestamp of the last time the API was fetched
is now used.
Each time the API is fetched for new patches, the timestamp
in the file gets updated, and the script sleeps an amount of time specified
by PAUSE_SECONDS before attempting to fetch new resources again.

The pause amount between each poll attempt is still 100 seconds.

Setting the env variable 'TZ' might be necessary if your timezone
doesn't match the server's timezone.

The package jq (Command-line JSON processor) is now required by the
script.

Example usage:
$ export TZ="Europe/Paris"
$ export MAINTAINERS_FILE_PATH=/path/to/dpdk/MAINTAINERS
$ ./tools/poll-pw /path/to/last.txt \
    '/path/to/maintainers.py --command set_pw_delegate --type patch $1'

Signed-off-by: Ali Alnubani <alialnu@nvidia.com>
---
 tools/poll-pw | 56 ++++++++++++++++++++++++++++++++-------------------
 1 file changed, 35 insertions(+), 21 deletions(-)

diff --git a/tools/poll-pw b/tools/poll-pw
index bdf860a..e104dab 100755
--- a/tools/poll-pw
+++ b/tools/poll-pw
@@ -1,58 +1,72 @@
-#! /bin/sh -e
+#! /bin/sh
 
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright 2017 6WIND S.A.
 # Copyright 2018 Mellanox Technologies, Ltd
 
 URL=http://patches.dpdk.org/api
+PAUSE_SECONDS=100
 
 print_usage () {
 	cat <<- END_OF_HELP
-	usage: $(basename $0) <counter> <command>
+	usage: $(basename $0) [OPTIONS] </path/to/last.txt> <command>
 
 	Poll patchwork and call command for each patch.
-	The first patchwork id to be checked is read from the counter file.
-	The command should use '$1' to be evaluated as patchwork id.
-	When a patch is found and the command is successful,
-	then the counter is incremented.
+	The first date to filter with is read from the specified file.
+	The command should use '$1' to be evaluated as the patch id.
+	The date in the specifed file is updated after each pull.
 	END_OF_HELP
 }
 
+which jq >/dev/null 2>&1
+if [ ! $? -eq 0 ] ; then
+	echo "The command 'jq' doesn't exist, please install it."
+	exit 1
+fi
+
 while getopts h arg ; do
 	case $arg in
 		h ) print_usage ; exit 0 ;;
 		? ) print_usage >&2 ; exit 1 ;;
 	esac
 done
+
 if [ $# -lt 2 ] ; then
-	printf 'missing argument\n\n' >&2
+	printf 'missing argument(s)\n\n' >&2
 	print_usage >&2
 	exit 1
 fi
 shift $(($OPTIND - 1))
-counter=$1
+since_file=$1
 shift
 cmd=$*
 
+if [ ! -f "$since_file" ] ; then
+	echo "The file '$since_file' doesn't exist."
+	exit 1
+fi
+
+date -d "$(cat $since_file | tr '\n' ' ')" >/dev/null 2>&1
+if [ ! $? -eq 0 ] ; then
+	echo "The file '$since_file' doesn't contain a valid date format."
+	exit 1
+fi
+
+URL="${URL}/patches/?"
+
 callcmd () # <patchwork id>
 {
 	eval $cmd
 }
 
-checkid () # <patchwork id>
-{
-	curl -sfIo /dev/null $URL/patches/$1/ ||
-	curl -sfIo /dev/null $URL/covers/$1/
-}
-
-pwid=$(cat $counter)
+set -e
 while true ; do
-	# process all recent patches
-	while checkid $pwid ; do
-		callcmd $pwid || break
-		pwid=$(($pwid + 1))
-		echo $pwid >$counter
+	date_now=$(date '+%FT%T')
+	since=$(date -d $(cat $since_file | tr '\n' ' ') '+%FT%T')
+	for id in $(curl -s "${URL}since=${since}" | jq '.[].id') ; do
+		callcmd $id || break
 	done
+	echo -n $date_now >$since_file
 	# pause before next check
-	sleep 100
+	sleep $PAUSE_SECONDS
 done
-- 
2.25.1