feat: initial commit

LICENSE

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+Copyright (c) 2022 ptrcnull
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

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+# execline-json
+
+> why would you even do that
+
+json parser written (mostly) in execline
+
+requirements:
+- execline
+- [execline-state](https://git.ddd.rip/ptrcnull/execline-state)
+- s6-portable-utils
+- sed
+- tr
+- cut (with delimiter/fields support)
+
+### usage
+
+```sh
+#!/bin/execlineb
+
+backtick -E users_json { curl https://gitlab.com/api/v4/users?username=ptrcnull }
+json users "$users_json"
+foreground { s6-echo "${users[0]}" }
+s6-echo "${users[0][id]}"
+```

json

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+#!/bin/execlineb
+
+multisubstitute {
+	importas -ui name 1
+	importas -ui input 2
+}
+
+backtick defines {
+	backtick -E cleaned { pipeline { s6-echo "$input" } tr -d "\\n" }
+	json-defines "$name" "$cleaned"
+}
+importas -uisd "\n" defines defines
+
+shift -n 2
+elgetpositionals
+$defines
+$@

json-defines

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+#!/bin/execlineb
+
+multisubstitute {
+	importas -ui name 1
+	importas -ui input 2
+}
+
+foreground {
+	s6-echo "define
+${name}
+${input}"
+}
+
+case "$input" {
+	"\\{.*\\}" {
+		pipeline { s6-unquote -d "{}" "$input" }
+		pipeline { json-split-entries }
+		forstdin -E entry
+		backtick -E quoted_key { pipeline { s6-echo "${entry}" } cut -d ":" -f1 }
+		backtick -E value { pipeline { s6-echo $entry } cut -d ":" -f2- }
+		backtick -E key { s6-unquote "$quoted_key" }
+		json-defines "${name}[${key}]" "$value"
+	}
+
+	"\\[.*\\]" {
+		pipeline { s6-unquote -d "[]" $input }
+		pipeline { json-split-entries }
+		pipeline { s6-grep -n . }
+		forstdin -E entry
+		backtick -E lua_index { pipeline { s6-echo $entry } cut -d ":" -f1 }
+		backtick -I -E index { s6-expr "$lua_index" - 1 }
+		backtick -E value { pipeline { s6-echo $entry } cut -d ":" -f2- }
+		json-defines "${name}[${index}]" "$value"
+	}
+}

json-split-entries

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+#!/bin/execlineb
+
+pipeline { sed "s/./\\0\\n/g" }
+init-state level
+save-state level 0
+foreground {
+	forstdin -E char
+		case "$char" {
+			"(\\{|\\[)" {
+				load-state level cur
+				backtick -I -E new { s6-expr "$cur" + 1 }
+				save-state level $new
+				s6-echo -n "$char"
+			}
+			"(\\}|\\])" {
+				load-state level cur
+				backtick -I -E new { s6-expr "$cur" - 1 }
+				save-state level $new
+				s6-echo -n "$char"
+			}
+			"," {
+				load-state level cur
+				save-state level "$cur"
+				ifelse { s6-test "$cur" = 0 } {
+					s6-echo
+				}
+				s6-echo -n "$char"
+			}
+		}
+		s6-echo -n "$char"
+}
+s6-echo