From a0cb075b70ca2367c7f105c37217de3a844d0563 Mon Sep 17 00:00:00 2001
From: Matthias Kruk <m@m10k.eu>
Date: Sat, 7 Jan 2023 17:33:53 +0900
Subject: [PATCH] include/json: Fix parsing of output from jq in
 json_array_tail()

The `json_array_tail()' function does not correctly handle return
values and parse output from jq, causing it to incorrectly handle
arrays that contain arrays or objects.

This commit modifies `json_array_tail()' so that it correctly
recognizes the type of data read from jq.
---
 include/json.sh   | 10 ++++++++--
 test/json_spec.sh |  6 +++---
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/include/json.sh b/include/json.sh
index 862747a..832116c 100644
--- a/include/json.sh
+++ b/include/json.sh
@@ -261,12 +261,18 @@ json_array_tail() {
 	local tail
 	local element
 	local new
+	local string_re
 
+	string_re='^"(.*)"$'
 	tail=()
 
 	while read -r element; do
-		tail+=("$element")
-	done < <(jq -r '.[1:][]' <<< "$array")
+		if [[ "$element" =~ $string_re ]]; then
+			tail+=("${BASH_REMATCH[1]}")
+		else
+			tail+=("$element")
+		fi
+	done < <(jq -c '.[1:][]' <<< "$array")
 
 	if ! new=$(json_array "${tail[@]}"); then
 		return 1
diff --git a/test/json_spec.sh b/test/json_spec.sh
index bbe5e0d..0fe5f29 100644
--- a/test/json_spec.sh
+++ b/test/json_spec.sh
@@ -339,8 +339,8 @@ Describe "json_array_tail()"
   End
 
   It "removes an object from the head of the array"
-    When call json_array_tail '[{}, {"hello": "world"}]'
-    The stdout should equal '[{"hello": "world"}]'
+    When call json_array_tail '[{}, {"hello":"world"}]'
+    The stdout should equal '[{"hello":"world"}]'
     The status should equal 0
   End
 End
@@ -352,7 +352,7 @@ Describe "json_array_to_lines()"
   End
 
   It "splits a string array to lines"
-    When call json_array_to_lines '["hello", "world"]'
+    When call json_array_to_lines '["hello","world"]'
     The first line of stdout should equal "hello"
     The second line of stdout should equal "world"
     The status should equal 0
-- 
2.47.3