automatic import all cppkg package

[luoliwoshang]

• Order issues during batch conversion

• Using llcppg.cfg with trimPrefixes to remove namespaces before importing into the repository; however, the automation process may not correctly identify and populate this configuration automatically

• Since batch conversion cannot be verified with demos, validation may only be possible via llgo build

• The auto-generated llcpp.cfg will, by default, include all header files under cflags. For example, libxml2 will include zlib headers as part of its includes, and libxslt will include both libxml2 and zlib headers — which is unintended. In such cases, headers like those from libxml2 and zlib need to be removed.

llpkg.cfg

{
  "upstream": {
    "package": {
      "name": "libxslt",
      "version": "1.1.34"
    },
    "installer":{
      "name": "conan",
      "config" : {
        "options": "libxml2/*:iconv=False"
      }
    }
  }
}

{
	"name": "libxslt_full_package",
	"cflags": "$(pkg-config --cflags libxslt_full_package)",
	"libs": "$(pkg-config --libs libxslt_full_package)",
	"include": [
		"libxslt/variables.h",
		"libxslt/functions.h",
		"libxslt/xsltutils.h",
		"libxslt/templates.h",
		"libxslt/pattern.h",
		"libxslt/preproc.h",
		"libxslt/extra.h",
		"libxslt/documents.h",
		"libxslt/imports.h",
		"libxslt/keys.h",
		"libxslt/transform.h",
		"libxslt/security.h",
		"libxslt/extensions.h",
		"libxslt/xsltInternals.h",
		"libexslt/exslt.h",
		"libxslt/numbersInternals.h",
		"libxslt/attributes.h",
		"libxslt/namespaces.h",
		"libxslt/xslt.h",
		"libxslt/xsltlocale.h",
		"libexslt/exsltexports.h",
		"libxslt/xsltconfig.h",
		"libxslt/xsltexports.h",
		"libexslt/exsltconfig.h",
		"libxml2/libxml/parserInternals.h",
		"libxml2/libxml/xmlschemastypes.h",
		"libxml2/libxml/xmlreader.h",
		"libxml2/libxml/HTMLtree.h",
		"libxml2/libxml/xpointer.h",
		"libxml2/libxml/xpathInternals.h",
		"libxml2/libxml/c14n.h",
		"libxml2/libxml/debugXML.h",
		"libxml2/libxml/threads.h",
		"libxml2/libxml/xlink.h",
		"libxml2/libxml/entities.h",
		"libxml2/libxml/globals.h",
		"libxml2/libxml/hash.h",
		"libxml2/libxml/SAX.h",
		"libxml2/libxml/SAX2.h",
		"libxml2/libxml/xpath.h",
		"libxml2/libxml/parser.h",
		"libxml2/libxml/xmlwriter.h",
		"libxml2/libxml/pattern.h",
		"libxml2/libxml/relaxng.h",
		"libxml2/libxml/schemasInternals.h",
		"libxml2/libxml/schematron.h",
		"libxml2/libxml/HTMLparser.h",
		"libxml2/libxml/tree.h",
		"libxml2/libxml/uri.h",
		"libxml2/libxml/valid.h",
		"libxml2/libxml/xinclude.h",
		"libxml2/libxml/encoding.h",
		"libxml2/libxml/xmlIO.h",
		"libxml2/libxml/catalog.h",
		"libxml2/libxml/xmlerror.h",
		"libxml2/libxml/xmlschemas.h",
		"libxml2/libxml/xmlmemory.h",
		"libxml2/libxml/xmlsave.h",
		"libxml2/libxml/xmlregexp.h",
		"libxml2/libxml/chvalid.h",
		"libxml2/libxml/xmlautomata.h",
		"libxml2/libxml/xmlmodule.h",
		"libxml2/libxml/xmlstring.h",
		"libxml2/libxml/xmlunicode.h",
		"libxml2/libxml/dict.h",
		"libxml2/libxml/nanohttp.h",
		"libxml2/libxml/nanoftp.h",
		"libxml2/libxml/list.h",
		"libxml2/libxml/xmlversion.h",
		"libxml2/libxml/xmlexports.h",
		"libxml2/win32config.h",
		"zlib.h",
		"zconf.h"
	],
	"trimPrefixes": [],
	"cplusplus": false,
	"deps": [],
	"keepUnderScore": false,
	"impl": [
		{
			"files": [],
			"cond": {
				"os": [],
				"arch": []
			}
		}
	],
	"mix": false
}

[luoliwoshang]

conan install --requires=libxml2/2.13.6 --build=missing --output-folder=./build --format=json > out.json

in the first node,we can found the include list,we can use this includedir to generate llcppg.cfg

{
  "1": {
    "ref": "libxml2/2.13.6#6771e0f3decae544bc94f16259438684",
    "id": "1",
    "recipe": "Cache",
    "package_id": "17c81ce2595e240ed54fedf0df8273c603d91ca6",
    "cpp_info": {
      "root": {
        "includedirs": [
          "/Users/zhangzhiyang/.conan2/p/b/libxm62f585fa7198f/p/include",
          "/Users/zhangzhiyang/.conan2/p/b/libxm62f585fa7198f/p/include/libxml2"
        ]
      }
    }
  }
}

[MeteorsLiu]

In the most common cases, a library's include directory only contains its own header files and not those of its dependencies.

Libraries like libxml2 are relatively rare exceptions, and I don't think we need to intentionally filter out the include directories.

Example:
redis++, whose dependency is hiredis, there's only include/sw/redis++ in its include.
twitch-native-ipc: whose dependency is libuv, there's only include/nativeipc in its include.

Similar libraries like aws-c-http, mongo-c-driver...