Remove PHP script doing message class splitting

There is a better approach in the Java version, so copying it (and fixing a minor error)

Author: ciaranmcnulty

messages/java/Makefile

@@ -5,7 +5,7 @@ JSONSCHEMAS = $(shell find ../jsonschema -name "*.json")
 .codegen: $(JSONSCHEMAS) ../jsonschema/scripts/codegen.rb ../jsonschema/scripts/templates/java.java.erb ../jsonschema/scripts/templates/java.enum.java.erb
 	ruby ../jsonschema/scripts/codegen.rb Java ../jsonschema java.java.erb > Generated.java.tmp
 	ruby ../jsonschema/scripts/codegen.rb Java ../jsonschema java.enum.java.erb >> Generated.java.tmp
-	csplit --quiet --prefix=Generated --suffix-format=%02d.java.tmp --elide-empty-files Generated.java.tmp /^.*.java$$/ {*}
+	csplit --quiet --prefix=Generated --suffix-format=%02d.java.tmp --elide-empty-files Generated.java.tmp /^.*[.]java$$/ {*}
 	rm Generated.java.tmp
 	rm -rf src/generated/java/io/cucumber/messages/types
 	mkdir --parents src/generated/java/io/cucumber/messages/types

messages/jsonschema/scripts/templates/php.enum.php.erb

@@ -1,8 +1,14 @@
 <% @enums.each do |enum| -%>
+<%= enum[:name].split('\\').join('/') %>.php
+<?php declare(strict_types=1);
+
+/**
+ * This code was auto-generated by {this script}[https://github.com/cucumber/common/blob/main/messages/jsonschema/scripts/codegen.rb]
+ */
+
 <%- namespaces = enum[:name].split('\\') -%>
 namespace Cucumber\Messages\<%= namespaces.slice(0,1)[0] %>;
 
-// CLASS_START <%= enum[:name].split('\\').join('/') %>.php
 enum <%= namespaces[-1] %> : string
 {
 <%- enum[:values].each_with_index do |value, index| -%>

messages/jsonschema/scripts/templates/php.php.erb

@@ -1,3 +1,5 @@
+<%- @schemas.sort.each do |key, schema| -%>
+<%= class_name(key) %>.php
 <?php
 
 declare(strict_types=1);
@@ -10,8 +12,6 @@ namespace Cucumber\Messages;
 
 use JsonSerializable;
 use Cucumber\Messages\DecodingException\SchemaViolationException;
-<%- @schemas.sort.each do |key, schema| -%>
-// CLASS_START <%= class_name(key) %>.php
 /**
  * Represents the <%= class_name(key) %> message in Cucumber's message protocol
  * @see https://github.com/cucumber/common/tree/main/messages#readme

messages/php/Makefile

@@ -4,19 +4,20 @@ JSONSCHEMAS = $(shell find ../jsonschema -name "*.json")
 
 clean: clean-build
 
-.codegen: build/messages.php
+.codegen: $(JSONSCHEMAS) ../jsonschema/scripts/codegen.rb ../jsonschema/scripts/templates/php.php.erb
+	ruby ../jsonschema/scripts/codegen.rb Php ../jsonschema php.php.erb > build/messages.php
+	ruby ../jsonschema/scripts/codegen.rb Php ../jsonschema php.enum.php.erb >> build/messages.php
+	csplit --quiet --prefix=build/Generated --suffix-format=%02d.php.tmp --elide-empty-files build/messages.php /^.*[.]php$$/ {*}
+	rm build/messages.php
+	rm -rf src-generated/*
+	for file in build/Generated**; do mkdir -p src-generated/$$(head -n 1 $$file | sed 's/[^/]*.php$$//'); done
+	for file in build/Generated**; do tail -n +2 $$file > src-generated/$$(head -n 1 $$file); rm $$file; done
+	vendor/bin/php-cs-fixer --diff fix src-generated
 
 clean-build:
 	rm -rf build/messages.php
 	rm -rf src-generated/*
 
-build/messages.php: $(JSONSCHEMAS) ../jsonschema/scripts/codegen.rb ../jsonschema/scripts/templates/php.php.erb
-	ruby ../jsonschema/scripts/codegen.rb Php ../jsonschema php.php.erb > $@
-	ruby ../jsonschema/scripts/codegen.rb Php ../jsonschema php.enum.php.erb >> $@
-	rm -rf src-generated/*
-	php split_classes.php
-	vendor/bin/php-cs-fixer --diff fix src-generated
-
 .tested: .cs-fixer
 
 .cs-fixer: