add bazel rule for generating package.xml with src/doc filegoups

BUILD.bazel

@@ -578,3 +578,10 @@ pkg_files(
     ],
     visibility = ["//pkg:__pkg__"],
 )
+
+# Version JSON file for release
+filegroup(
+    name = "version_json",
+    srcs = ["version.json"],
+    visibility=["//visibility:public"],
+)

php/ext/google/protobuf/BUILD.bazel

@@ -0,0 +1,76 @@
+
+# Protobuf PHP extension (PECL)
+
+filegroup(
+  name = "template_package_xml",
+  srcs = ["template_package.xml"],
+)
+
+filegroup(
+  name = "src_files",
+  srcs = glob(
+    [
+      "**/*.m4",
+      "**/*.c",
+      "**/*.h",
+      "**/*.inc"
+    ],
+    exclude = [
+      "tests/**",
+    ]
+  ),
+)
+
+filegroup(
+  name = "doc_files",
+  srcs = glob([
+    "**/LICENSE",
+  ])
+)
+
+genrule(
+    name = "pecl_dist",
+    srcs = [
+      ":src_files",
+      ":doc_files",
+      ":template_package_xml",
+      "//:version_json",
+    ],
+    outs = ["package.xml"],
+    cmd = """
+      DATE=$$(date +%Y-%m-%d)
+      TIME=$$(date +%H:%M:%S)
+
+      php_version_json=$$(cat $(location //:version_json) | python -c "import json, sys; versions=json.load(sys.stdin); print(versions.popitem()[1]['languages']['php'])")
+      php_version_array=($${php_version_json//-rc/ })
+      api_version=$${php_version_array[0]}
+      if [ $${#php_version_array[@]} -eq 2 ]; then
+        rc=$${php_version_array[1]}
+        release_version=$${api_version}RC$${rc}
+        stability='beta'
+      else
+        release_version=$${api_version}
+        stability='stable'
+      fi
+      
+      FILE='<file baseinstalldir=\"/\" name=\"NAME\" role=\"ROLE\"/>\\n'
+      files="\\n"
+      for file in $$(find -L $(locations :src_files) -type f); do
+        name=$$(echo $$file | sed -e 's|php/ext/google/protobuf/||')
+        files+='    '$$(echo $$FILE | sed -e "s;NAME;$${name};" | sed -e "s;ROLE;src;")
+      done
+      for file in $$(find -L $(locations :doc_files) -type f); do
+        name=$$(echo $$file | sed -e 's|php/ext/google/protobuf/||')
+        files+='    '$$(echo $$FILE | sed -e "s;NAME;$${name};" | sed -e "s;ROLE;doc;")
+      done
+
+      cat $(location :template_package_xml) | 
+      sed -e "s;TEMPLATE_DATE;$${DATE};" |
+      sed -e "s;TEMPLATE_TIME;$${TIME};" |
+      sed -e "s;TEMPLATE_PHP_RELEASE;$${release_version};" |
+      sed -e "s;TEMPLATE_PHP_API;$${api_version};" |
+      sed -e "s;TEMPLATE_PHP_STABILITY;$${stability};" |
+      sed -e "s;TEMPLATE_FILES;$${files};"
+      > "$@"
+    """
+)

php/ext/google/protobuf/template_package.xml

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<package xmlns="http://pear.php.net/dtd/package-2.0" xmlns:tasks="http://pear.php.net/dtd/tasks-1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" packagerversion="1.9.5" version="2.0" xsi:schemaLocation="http://pear.php.net/dtd/tasks-1.0 http://pear.php.net/dtd/tasks-1.0.xsd http://pear.php.net/dtd/package-2.0 http://pear.php.net/dtd/package-2.0.xsd">
+ <name>protobuf</name>
+ <channel>pecl.php.net</channel>
+ <summary>Google's language-neutral, platform-neutral, extensible mechanism for serializing structured data.</summary>
+ <description>https://developers.google.com/protocol-buffers/</description>
+ <lead>
+  <name>Protobuf Team</name>
+  <user>protobufpackages</user>
+  <email>protobuf-packages@google.com</email>
+  <active>yes</active>
+ </lead>
+ <date>TEMPLATE_DATE</date>
+ <time>TEMPLATE_TIME</time>
+ <version>
+  <release>TEMPLATE_PHP_RELEASE</release>
+  <api>TEMPLATE_PHP_API</api>
+ </version>
+ <stability>
+  <release>TEMPLATE_PHP_STABILITY</release>
+  <api>TEMPLATE_PHP_STABILITY</api>
+ </stability>
+ <license uri="https://opensource.org/licenses/BSD-3-Clause">BSD-3-Clause</license>
+ <notes>
+ * See github.com/protocolbuffers/protobuf/releases for release notes.
+ </notes>
+ <contents>
+  <dir baseinstalldir="/" name="/">TEMPLATE_FILES</dir>
+ </contents>
+ <dependencies>
+  <required>
+   <php>
+    <min>7.0.0</min>
+   </php>
+   <pearinstaller>
+    <min>1.4.0</min>
+   </pearinstaller>
+  </required>
+ </dependencies>
+ <providesextension>protobuf</providesextension>
+ <extsrcrelease/>
+</package>