Testing Rez's conflict resolve and package not found detailed message

mem_test.py

import os


os.environ["REZ_PACKAGES_PATH"] = "memory@any"

def memory_repository(packages):
    from rez.package_repository import package_repository_manager

    repository = package_repository_manager.get_repository("memory@any")
    repository.data = packages


if __name__ == "__main__":
    from rez.resolved_context import ResolvedContext
    from rez.exceptions import PackageFamilyNotFoundError

    memory_repository({

        # Conflict on merge

        "bar": {
            "1": {
                "name": "bar",
                "version": "1",
                "requires": [
                    "dep==2",
                ],
            }
        },

        "foo": {
            "1": {
                "name": "foo",
                "version": "1",
                "requires": [
                    "dep==1",
                ],
            }
        },

        "dep": {
            "1": {
                "name": "dep",
                "version": "1",
            },
            "2": {
                "name": "dep",
                "version": "2",
            },
        },

        # Conflict on intersect

        "tom": {
            "1": {
                "name": "tom",
                "version": "1",
                "requires": [
                    "kai==1",
                ],
            }
        },

        "dav": {
            "1": {
                "name": "dav",
                "version": "1",
                "requires": [
                    "kai==1",
                ],
            }
        },

        "kai": {
            "1": {
                "name": "kai",
                "version": "1",
            },
            "2": {
                "name": "kai",
                "version": "2",
            },
        },

        # Deeper conflict

        "pipeline": {
            "1": {
                "name": "pipeline",
                "version": "1",
                "requires": [
                    "maya-2020",
                ],
            }
        },

        "maya": {
            "2020": {
                "name": "maya",
                "version": "2020",
                "requires": [
                    "pymel",
                ],
            }
        },

        "pymel": {
            "2": {
                "name": "pymel",
                "version": "2",
                "requires": [
                    "python==2",
                ],
            }
        },

        "houdini": {
            "18": {
                "name": "houdini",
                "version": "18",
                "requires": [
                    "python==3",
                ],
            }
        },

        "python": {
            "2": {
                "name": "python",
                "version": "2",
            },
            "3": {
                "name": "python",
                "version": "3",
            },
        },

        # Package not found

        "dummy": {
            "1": {
                "name": "dummy",
                "version": "1",
                "requires": [
                    "oops==1",
                ],
            },
            "2": {
                "name": "dummy",
                "version": "2",
                "requires": [
                    "oops==2",
                ],
            }
        },

        # Package not found

        "miely": {
            "1": {
                "name": "miely",
                "version": "1",
                "requires": [
                    "dummy>1",
                ],
            }
        },

        # Cycles

        "nuke": {
            "11": {
                "name": "nuke",
                "version": "11",
                "requires": [
                    "cycle==00",
                    "python==3",
                ],
            }
        },

        "cycle": {
            "00": {
                "name": "cycle",
                "version": "00",
                "requires": [
                    "nuke",
                ],
            },
            "99": {
                "name": "cycle",
                "version": "99",
                "requires": [
                    "nuke",
                ],
            }
        },

    })

    print("\nConflict on merge")
    print("=" * 20)
    context = ResolvedContext(["foo", "bar"])
    context.print_info()

    print("\nConflict on intersect")
    print("=" * 20)
    context = ResolvedContext(["tom", "dav", "kai==2"])
    context.print_info()

    print("\nConflict on intersect (deeper)")
    print("=" * 20)
    context = ResolvedContext(["pipeline", "maya", "houdini"])
    context.print_info()

    print("\nRequired package not found")
    print("=" * 20)
    try:
        context = ResolvedContext(["dummy"])
    except PackageFamilyNotFoundError as e:
        print(e)

    print("\nRequired package not found (deeper)")
    print("=" * 20)
    try:
        context = ResolvedContext(["miely"])
    except PackageFamilyNotFoundError as e:
        print(e)

    print("\nCycle")
    print("=" * 20)
    context = ResolvedContext(["nuke"])
    context.print_info()

    print("\nConflict on intersect (with cycle hidden)")
    print("=" * 20)
    context = ResolvedContext(["pipeline", "nuke", "maya"])
    context.print_info()

result.txt

Conflict on merge
====================
The context failed to resolve:
The following package conflicts occurred: (dep==1 <--!--> dep==2)
	dep==1: foo==1
	dep==2: bar==1

Conflict on intersect
====================
The context failed to resolve:
The following package conflicts occurred: (kai==1 <--!--> kai==2)
	kai==1: tom==1
	kai==2: -

Conflict on intersect (deeper)
====================
The context failed to resolve:
The following package conflicts occurred: (python==2 <--!--> python==3)
	python==2: pymel==2 <-- maya==2020 <-- pipeline==1
	python==3: houdini==18

Required package not found
====================
package family not found: oops, was required by: dummy==1|==2 (searched: memory@any)

Required package not found (deeper)
====================
package family not found: oops, was required by: dummy==2 (searched: memory@any)

Cycle
====================
The context failed to resolve:
A cyclic dependency was detected: nuke-11 --> cycle-00 --> nuke-11

Conflict on intersect (with cycle hidden)
====================
The context failed to resolve:
The following package conflicts occurred: (python==2 <--!--> python==3)
	python==2: pymel==2 <-- maya==2020 <-- pipeline==1
	python==3: nuke==11 <-- cycle==00