[nft PATCH 24/28] tests: py: tools: Add regen_payloads.sh

[Phil Sutter <phil@nwl.cc>]

Use this script to recreate all payload records.

Signed-off-by: Phil Sutter <phil@nwl.cc>
---
 tests/py/tools/regen_payloads.sh | 74 ++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100755 tests/py/tools/regen_payloads.sh

diff --git a/tests/py/tools/regen_payloads.sh b/tests/py/tools/regen_payloads.sh
new file mode 100755
index 0000000000000..9fcbc2c0912a5
--- /dev/null
+++ b/tests/py/tools/regen_payloads.sh
@@ -0,0 +1,74 @@
+#!/bin/bash
+
+# update payload records in an automated fashion, trying to reduce diff sizes
+
+
+# scan payloadfile and print record for cmd (if found)
+find_payload() { # (payloadfile, cmd)
+	local found=false
+
+	readarray -t pl <"$1"
+	for l in "${pl[@]}"; do
+		if [[ "$l" == "# "* ]]; then
+			$found && return
+			[[ "$l" == "$2" ]] && found=true
+		fi
+		$found && echo "$l"
+	done
+	$found || echo "Warning: Command '$2' not found in '$1'" >&2
+}
+
+cd $(dirname $0)/../
+
+# make sure no stray output files get in the way
+rm -f */*.got */*.gotgot
+
+# store payload records for later
+# clear payload files to force regenerating (but leave them in place)
+for pl in */*.payload*; do
+	[[ $pl == *.bak ]] && continue # ignore leftover .bak files
+	cp "$pl" "${pl}.bak"
+	echo >"$pl"
+done
+
+# run the testsuite to create .got files
+# pass -f to keep going despite missing payloads
+./nft-test.py -f
+
+# restore old payload records
+for plbak in */*.bak; do
+	mv "$plbak" "${plbak%.bak}"
+done
+
+# sort created got files to match order in old payload records
+for g in ${@:-*/*.payload*.got}; do
+	pl=${g%.got}
+
+	[[ -f $g ]] || continue
+	[[ -f $pl ]] || continue
+
+	readarray -t ploads <"$g"
+	readarray -t cmds <<< $(grep '^# ' $pl)
+	for cmd in "${cmds[@]}"; do
+		found=false
+		for l in "${ploads[@]}"; do
+			if [[ "$l" == "# "* ]]; then
+				$found && break
+				[[ "$l" == "$cmd" ]] && found=true
+			fi
+			$found && [[ "$l" != "" ]] && echo "$l"
+		done
+		if ! $found; then
+			echo "Warning: Command '$cmd' not found in '$g'" >&2
+		else
+			echo ""
+		fi
+	done | head -n -1 >${g}got
+
+	mv "${g}got" "${g}"
+done
+
+# overwrite old payload records with new ones
+for got in */*.payload*.got; do
+	mv "${got}" "${got%.got}"
+done
-- 
2.51.0