Recipe and Sources in a Different Repo
In the previous section, we fetched the sources of our library from an external repository. It is a typical workflow for packaging third party libraries.
There are two different ways to fetch the sources from an external repository:
Using the
source()
method as we displayed in the previous section:
from conans import ConanFile, CMake, tools
class HelloConan(ConanFile):
...
def source(self):
self.run("git clone https://github.com/conan-io/hello.git")
...
You can also use the tools.Git class:
from conans import ConanFile, CMake, tools
class HelloConan(ConanFile):
...
def source(self):
git = tools.Git(folder="hello")
git.clone("https://github.com/conan-io/hello.git", "master")
...
Using the scm attribute of the ConanFile:
Warning
This is a deprecated feature. Please refer to the Migration Guidelines to find the feature that replaces this one.
from conans import ConanFile, CMake, tools
class HelloConan(ConanFile):
scm = {
"type": "git",
"subfolder": "hello",
"url": "https://github.com/conan-io/hello.git",
"revision": "master"
}
...
Conan will clone the scm url
and will checkout the scm revision
. Head to creating package documentation to know
more details about SCM feature.
The source()
method will be called after the checkout process, so you can still use it to patch something or retrieve more sources, but
it is not necessary in most cases.