[bug] Channel overriding inconsistent between build / create / graph about conan HOT 6 CLOSED

The issue remaining is therefore that graph info does not accept the channel on the command line without the user (even if no channel is defined in the recipe) and outputs the following error:

That is correct. Using channel but not user is not allowed, there were some complexities to maintain compatibility in the server sides, it would be breaking, so it is not allowed.

So let's say there is a recipe with a user defined as "my_user" and no channel, the graph info command requires to specify the user again (exactly) through the command line if specifying a channel, which is not the case for the build and create commands:

Then, this we want indeed to check it, I'll try to reproduce in a test.

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Found the issue, was a too early argument check, I have moved it later to allow this: #15794, it will be in next 2.2

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Hi @docbrown1955

Thanks for your report
I am not sure this works with create, the following test fails:

def test_user_channel_override():
    c = TestClient()
    conanfile = textwrap.dedent("""
        from conan import ConanFile
        class SayConan(ConanFile):
            name = "pkg"
            version = "0.1"
            user = "user"
            channel = "channel"
        """)

    c.save({"conanfile.py": conanfile})
    c.run("create . --channel=testing")
   # ERROR:
   # ERROR: Package recipe with channel testing!=channel

Can you please check it?

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Hi @memsharded,

You are right, I did the test on a recipe that did not have the channel defined (while I thought it had one). So build and create are consistent and prevent overriding the channel through the CLI.

The issue remaining is therefore that graph info does not accept the channel on the command line without the user (even if no channel is defined in the recipe) and outputs the following error:

ERROR: Can't specify --channel without --user

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So let's say there is a recipe with a user defined as "my_user" and no channel, the graph info command requires to specify the user again (exactly) through the command line if specifying a channel, which is not the case for the build and create commands:

conan graph info . --channel=my_channel --user=my_user

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Not sure about that either 😅

def test_graph_info_user():
    """
    https://github.com/conan-io/conan/issues/15791
    """
    c = TestClient()
    conanfile = textwrap.dedent("""
        from conan import ConanFile
        class Pkg(ConanFile):
            name = "pkg"
            version = "0.1"
            user = "user"
        """)

    c.save({"conanfile.py": conanfile})
    c.run("graph info .")
    assert "pkg/0.1@user" in c.out

UPDATE: Sorry, now I got it. adding

c.run("graph info . --channel=channel")
assert "pkg/0.1@user/channel" in c.out

Makes it fail

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