We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
[package] date/2.4.1: header_only option
Please add a header_only option to 'date' recipe.

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `recipes/date/all/conanfile.py`
Content:
```
1 import os
2 from conans import ConanFile, CMake, tools
3 
4 
5 class DateConan(ConanFile):
6     name = "date"
7     url = "https://github.com/conan-io/conan-center-index"
8     homepage = "https://github.com/HowardHinnant/date"
9     description = "A date and time library based on the C++11/14/17 <chrono> header"
10     topics = ("date", "datetime", "timezone",
11               "calendar", "time", "iana-database")
12     license = "MIT"
13     exports_sources = ["patches/*", "CMakeLists.txt"]
14     settings = "os", "arch", "compiler", "build_type"
15     generators = "cmake",
16     options = {"shared": [True, False],
17                "fPIC": [True, False],
18                "use_system_tz_db": [True, False],
19                "use_tz_db_in_dot": [True, False]}
20     default_options = {"shared": False,
21                        "fPIC": True,
22                        "use_system_tz_db": False,
23                        "use_tz_db_in_dot": False}
24 
25     _cmake = None
26 
27     @property
28     def _source_subfolder(self):
29         return "source_subfolder"
30     @property
31     def _build_subfolder(self):
32         return "build_subfolder"
33 
34     def _configure_cmake(self):
35         if self._cmake:
36             return self._cmake
37         cmake = CMake(self)
38         cmake.definitions["ENABLE_DATE_TESTING"] = False
39         cmake.definitions["USE_SYSTEM_TZ_DB"] = self.options.use_system_tz_db
40         cmake.definitions["USE_TZ_DB_IN_DOT"] = self.options.use_tz_db_in_dot
41         cmake.configure()
42 
43         self._cmake = cmake
44         return self._cmake
45 
46     def config_options(self):
47         if self.settings.os == "Windows":
48             del self.options.fPIC
49 
50     def configure(self):
51         if self.settings.compiler.cppstd:
52             tools.check_min_cppstd(self, "11")
53 
54     def requirements(self):
55         if not self.options.use_system_tz_db:
56             self.requires("libcurl/7.69.1")
57 
58     def source(self):
59         tools.get(**self.conan_data["sources"][self.version])
60         extracted_dir = self.name + "-" + self.version
61         os.rename(extracted_dir, self._source_subfolder)
62 
63     def build(self):
64         for patch in self.conan_data["patches"][self.version]:
65             tools.patch(**patch)
66         cmake = self._configure_cmake()
67         cmake.build()
68 
69     def package(self):
70         self.copy(pattern="LICENSE.txt", dst="licenses",
71                   src=self._source_subfolder)
72         cmake = self._configure_cmake()
73         cmake.install()
74         tools.rmdir(os.path.join(self.package_folder, "lib", "cmake"))
75         tools.rmdir(os.path.join(self.package_folder, "CMake"))
76 
77     def package_info(self):
78         self.cpp_info.libs = tools.collect_libs(self)
79         if self.settings.os == "Linux":
80             self.cpp_info.system_libs.append("pthread")
81 
82         if self.options.use_system_tz_db and not self.settings.os == "Windows":
83             use_os_tzdb = 1
84         else:
85             use_os_tzdb = 0
86 
87         defines = ["USE_OS_TZDB={}".format(use_os_tzdb)]
88         if self.settings.os == "Windows" and self.options.shared:
89             defines.append("DATE_USE_DLL=1")
90 
91         self.cpp_info.defines.extend(defines)
92
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/recipes/date/all/conanfile.py b/recipes/date/all/conanfile.py
--- a/recipes/date/all/conanfile.py
+++ b/recipes/date/all/conanfile.py
@@ -15,10 +15,12 @@
     generators = "cmake",
     options = {"shared": [True, False],
                "fPIC": [True, False],
+               "header_only": [True, False],
                "use_system_tz_db": [True, False],
                "use_tz_db_in_dot": [True, False]}
     default_options = {"shared": False,
                        "fPIC": True,
+                       "header_only": False,
                        "use_system_tz_db": False,
                        "use_tz_db_in_dot": False}
 
@@ -52,6 +54,8 @@
             tools.check_min_cppstd(self, "11")
 
     def requirements(self):
+        if self.options.header_only:
+            return
         if not self.options.use_system_tz_db:
             self.requires("libcurl/7.69.1")
 
@@ -63,18 +67,34 @@
     def build(self):
         for patch in self.conan_data["patches"][self.version]:
             tools.patch(**patch)
+        if self.options.header_only:
+            self.output.info("Header only package, skipping build")
+            return
         cmake = self._configure_cmake()
         cmake.build()
 
     def package(self):
         self.copy(pattern="LICENSE.txt", dst="licenses",
                   src=self._source_subfolder)
+        if self.options.header_only:
+            src = os.path.join(self._source_subfolder, "include", "date")
+            dst = os.path.join("include", "date")
+            self.copy(pattern="date.h", dst=dst, src=src)
+            self.copy(pattern="tz.h", dst=dst, src=src)
+            self.copy(pattern="iso_week.h", dst=dst, src=src)
+            self.copy(pattern="julian.h", dst=dst, src=src)
+            self.copy(pattern="islamic.h", dst=dst, src=src)
+            return
+
         cmake = self._configure_cmake()
         cmake.install()
         tools.rmdir(os.path.join(self.package_folder, "lib", "cmake"))
         tools.rmdir(os.path.join(self.package_folder, "CMake"))
 
     def package_info(self):
+        if self.options.header_only:
+            return
+
         self.cpp_info.libs = tools.collect_libs(self)
         if self.settings.os == "Linux":
             self.cpp_info.system_libs.append("pthread")
@@ -89,3 +109,7 @@
             defines.append("DATE_USE_DLL=1")
 
         self.cpp_info.defines.extend(defines)
+
+    def package_id(self):
+        if self.options.header_only:
+            self.info.header_only()

{"golden_diff": "diff --git a/recipes/date/all/conanfile.py b/recipes/date/all/conanfile.py\n--- a/recipes/date/all/conanfile.py\n+++ b/recipes/date/all/conanfile.py\n@@ -15,10 +15,12 @@\n     generators = \"cmake\",\n     options = {\"shared\": [True, False],\n                \"fPIC\": [True, False],\n+               \"header_only\": [True, False],\n                \"use_system_tz_db\": [True, False],\n                \"use_tz_db_in_dot\": [True, False]}\n     default_options = {\"shared\": False,\n                        \"fPIC\": True,\n+                       \"header_only\": False,\n                        \"use_system_tz_db\": False,\n                        \"use_tz_db_in_dot\": False}\n \n@@ -52,6 +54,8 @@\n             tools.check_min_cppstd(self, \"11\")\n \n     def requirements(self):\n+        if self.options.header_only:\n+            return\n         if not self.options.use_system_tz_db:\n             self.requires(\"libcurl/7.69.1\")\n \n@@ -63,18 +67,34 @@\n     def build(self):\n         for patch in self.conan_data[\"patches\"][self.version]:\n             tools.patch(**patch)\n+        if self.options.header_only:\n+            self.output.info(\"Header only package, skipping build\")\n+            return\n         cmake = self._configure_cmake()\n         cmake.build()\n \n     def package(self):\n         self.copy(pattern=\"LICENSE.txt\", dst=\"licenses\",\n                   src=self._source_subfolder)\n+        if self.options.header_only:\n+            src = os.path.join(self._source_subfolder, \"include\", \"date\")\n+            dst = os.path.join(\"include\", \"date\")\n+            self.copy(pattern=\"date.h\", dst=dst, src=src)\n+            self.copy(pattern=\"tz.h\", dst=dst, src=src)\n+            self.copy(pattern=\"iso_week.h\", dst=dst, src=src)\n+            self.copy(pattern=\"julian.h\", dst=dst, src=src)\n+            self.copy(pattern=\"islamic.h\", dst=dst, src=src)\n+            return\n+\n         cmake = self._configure_cmake()\n         cmake.install()\n         tools.rmdir(os.path.join(self.package_folder, \"lib\", \"cmake\"))\n         tools.rmdir(os.path.join(self.package_folder, \"CMake\"))\n \n     def package_info(self):\n+        if self.options.header_only:\n+            return\n+\n         self.cpp_info.libs = tools.collect_libs(self)\n         if self.settings.os == \"Linux\":\n             self.cpp_info.system_libs.append(\"pthread\")\n@@ -89,3 +109,7 @@\n             defines.append(\"DATE_USE_DLL=1\")\n \n         self.cpp_info.defines.extend(defines)\n+\n+    def package_id(self):\n+        if self.options.header_only:\n+            self.info.header_only()\n", "issue": "[package] date/2.4.1: header_only option\nPlease add a header_only option to 'date' recipe.\n", "before_files": [{"content": "import os\nfrom conans import ConanFile, CMake, tools\n\n\nclass DateConan(ConanFile):\n    name = \"date\"\n    url = \"https://github.com/conan-io/conan-center-index\"\n    homepage = \"https://github.com/HowardHinnant/date\"\n    description = \"A date and time library based on the C++11/14/17 <chrono> header\"\n    topics = (\"date\", \"datetime\", \"timezone\",\n              \"calendar\", \"time\", \"iana-database\")\n    license = \"MIT\"\n    exports_sources = [\"patches/*\", \"CMakeLists.txt\"]\n    settings = \"os\", \"arch\", \"compiler\", \"build_type\"\n    generators = \"cmake\",\n    options = {\"shared\": [True, False],\n               \"fPIC\": [True, False],\n               \"use_system_tz_db\": [True, False],\n               \"use_tz_db_in_dot\": [True, False]}\n    default_options = {\"shared\": False,\n                       \"fPIC\": True,\n                       \"use_system_tz_db\": False,\n                       \"use_tz_db_in_dot\": False}\n\n    _cmake = None\n\n    @property\n    def _source_subfolder(self):\n        return \"source_subfolder\"\n    @property\n    def _build_subfolder(self):\n        return \"build_subfolder\"\n\n    def _configure_cmake(self):\n        if self._cmake:\n            return self._cmake\n        cmake = CMake(self)\n        cmake.definitions[\"ENABLE_DATE_TESTING\"] = False\n        cmake.definitions[\"USE_SYSTEM_TZ_DB\"] = self.options.use_system_tz_db\n        cmake.definitions[\"USE_TZ_DB_IN_DOT\"] = self.options.use_tz_db_in_dot\n        cmake.configure()\n\n        self._cmake = cmake\n        return self._cmake\n\n    def config_options(self):\n        if self.settings.os == \"Windows\":\n            del self.options.fPIC\n\n    def configure(self):\n        if self.settings.compiler.cppstd:\n            tools.check_min_cppstd(self, \"11\")\n\n    def requirements(self):\n        if not self.options.use_system_tz_db:\n            self.requires(\"libcurl/7.69.1\")\n\n    def source(self):\n        tools.get(**self.conan_data[\"sources\"][self.version])\n        extracted_dir = self.name + \"-\" + self.version\n        os.rename(extracted_dir, self._source_subfolder)\n\n    def build(self):\n        for patch in self.conan_data[\"patches\"][self.version]:\n            tools.patch(**patch)\n        cmake = self._configure_cmake()\n        cmake.build()\n\n    def package(self):\n        self.copy(pattern=\"LICENSE.txt\", dst=\"licenses\",\n                  src=self._source_subfolder)\n        cmake = self._configure_cmake()\n        cmake.install()\n        tools.rmdir(os.path.join(self.package_folder, \"lib\", \"cmake\"))\n        tools.rmdir(os.path.join(self.package_folder, \"CMake\"))\n\n    def package_info(self):\n        self.cpp_info.libs = tools.collect_libs(self)\n        if self.settings.os == \"Linux\":\n            self.cpp_info.system_libs.append(\"pthread\")\n\n        if self.options.use_system_tz_db and not self.settings.os == \"Windows\":\n            use_os_tzdb = 1\n        else:\n            use_os_tzdb = 0\n\n        defines = [\"USE_OS_TZDB={}\".format(use_os_tzdb)]\n        if self.settings.os == \"Windows\" and self.options.shared:\n            defines.append(\"DATE_USE_DLL=1\")\n\n        self.cpp_info.defines.extend(defines)\n", "path": "recipes/date/all/conanfile.py"}], "after_files": [{"content": "import os\nfrom conans import ConanFile, CMake, tools\n\n\nclass DateConan(ConanFile):\n    name = \"date\"\n    url = \"https://github.com/conan-io/conan-center-index\"\n    homepage = \"https://github.com/HowardHinnant/date\"\n    description = \"A date and time library based on the C++11/14/17 <chrono> header\"\n    topics = (\"date\", \"datetime\", \"timezone\",\n              \"calendar\", \"time\", \"iana-database\")\n    license = \"MIT\"\n    exports_sources = [\"patches/*\", \"CMakeLists.txt\"]\n    settings = \"os\", \"arch\", \"compiler\", \"build_type\"\n    generators = \"cmake\",\n    options = {\"shared\": [True, False],\n               \"fPIC\": [True, False],\n               \"header_only\": [True, False],\n               \"use_system_tz_db\": [True, False],\n               \"use_tz_db_in_dot\": [True, False]}\n    default_options = {\"shared\": False,\n                       \"fPIC\": True,\n                       \"header_only\": False,\n                       \"use_system_tz_db\": False,\n                       \"use_tz_db_in_dot\": False}\n\n    _cmake = None\n\n    @property\n    def _source_subfolder(self):\n        return \"source_subfolder\"\n    @property\n    def _build_subfolder(self):\n        return \"build_subfolder\"\n\n    def _configure_cmake(self):\n        if self._cmake:\n            return self._cmake\n        cmake = CMake(self)\n        cmake.definitions[\"ENABLE_DATE_TESTING\"] = False\n        cmake.definitions[\"USE_SYSTEM_TZ_DB\"] = self.options.use_system_tz_db\n        cmake.definitions[\"USE_TZ_DB_IN_DOT\"] = self.options.use_tz_db_in_dot\n        cmake.configure()\n\n        self._cmake = cmake\n        return self._cmake\n\n    def config_options(self):\n        if self.settings.os == \"Windows\":\n            del self.options.fPIC\n\n    def configure(self):\n        if self.settings.compiler.cppstd:\n            tools.check_min_cppstd(self, \"11\")\n\n    def requirements(self):\n        if self.options.header_only:\n            return\n        if not self.options.use_system_tz_db:\n            self.requires(\"libcurl/7.69.1\")\n\n    def source(self):\n        tools.get(**self.conan_data[\"sources\"][self.version])\n        extracted_dir = self.name + \"-\" + self.version\n        os.rename(extracted_dir, self._source_subfolder)\n\n    def build(self):\n        for patch in self.conan_data[\"patches\"][self.version]:\n            tools.patch(**patch)\n        if self.options.header_only:\n            self.output.info(\"Header only package, skipping build\")\n            return\n        cmake = self._configure_cmake()\n        cmake.build()\n\n    def package(self):\n        self.copy(pattern=\"LICENSE.txt\", dst=\"licenses\",\n                  src=self._source_subfolder)\n        if self.options.header_only:\n            src = os.path.join(self._source_subfolder, \"include\", \"date\")\n            dst = os.path.join(\"include\", \"date\")\n            self.copy(pattern=\"date.h\", dst=dst, src=src)\n            self.copy(pattern=\"tz.h\", dst=dst, src=src)\n            self.copy(pattern=\"iso_week.h\", dst=dst, src=src)\n            self.copy(pattern=\"julian.h\", dst=dst, src=src)\n            self.copy(pattern=\"islamic.h\", dst=dst, src=src)\n            return\n\n        cmake = self._configure_cmake()\n        cmake.install()\n        tools.rmdir(os.path.join(self.package_folder, \"lib\", \"cmake\"))\n        tools.rmdir(os.path.join(self.package_folder, \"CMake\"))\n\n    def package_info(self):\n        if self.options.header_only:\n            return\n\n        self.cpp_info.libs = tools.collect_libs(self)\n        if self.settings.os == \"Linux\":\n            self.cpp_info.system_libs.append(\"pthread\")\n\n        if self.options.use_system_tz_db and not self.settings.os == \"Windows\":\n            use_os_tzdb = 1\n        else:\n            use_os_tzdb = 0\n\n        defines = [\"USE_OS_TZDB={}\".format(use_os_tzdb)]\n        if self.settings.os == \"Windows\" and self.options.shared:\n            defines.append(\"DATE_USE_DLL=1\")\n\n        self.cpp_info.defines.extend(defines)\n\n    def package_id(self):\n        if self.options.header_only:\n            self.info.header_only()\n", "path": "recipes/date/all/conanfile.py"}]}