RPM Support

Possibly tangentially related to this 2.4.1 fixed bug? https://bugzilla.redhat.com/show_bug.cgi?id=1118501

I played some logic-branching code plinko for a little while with this one, but a PR is up now:
https://github.com/pulp/pulp_rpm/pull/820

What I found is that yum keeps a list[0] of "Install-only packages". As the description would imply, these are the packages that yum does not update. Rather, it only ever installs them, installing multiple versions simultaneously if needed. When yum installs or updates these packages, instead of using the "normal" TS_INSTALL or TS_UPDATE transaction state, it reports TS_TRUEINSTALL to differentiate the transaction result from that of a normal package.

Install[1] and update[2] were the only places where I see this short-circuiting to the "addTrueInstall" method happen, and indeed the only place that I would assume that this would happen now that I know it does happen, so those are the only bits of code that needed to be updating. Updating the yum mock that we use to test this code was another matter entirely, but is also included in the linked PR.

So, the problem as reported was that the kernel package wasn't being included in task results, like this one:

...
  "result": {
    "num_changes": 4, 
    "reboot": {
      "scheduled": false, 
      "details": {}
    }, 
    "succeeded": true, 
    "details": {
      "rpm": {
        "details": {
          "resolved": [
            {
              "name": "kernel-tools-libs", 
              "qname": "kernel-tools-libs-3.10.0-327.10.1.el7.x86_64", 
              "epoch": "0", 
              "version": "3.10.0", 
              "release": "327.10.1.el7", 
              "arch": "x86_64", 
              "repoid": "rhel7"
            }, 
            {
              "name": "python-perf", 
              "qname": "python-perf-3.10.0-327.10.1.el7.x86_64", 
              "epoch": "0", 
              "version": "3.10.0", 
              "release": "327.10.1.el7", 
              "arch": "x86_64", 
              "repoid": "rhel7"
            }, 
            {
              "name": "kernel-tools", 
              "qname": "kernel-tools-3.10.0-327.10.1.el7.x86_64", 
              "epoch": "0", 
              "version": "3.10.0", 
              "release": "327.10.1.el7", 
              "arch": "x86_64", 
              "repoid": "rhel7"
            }
          ], 
          "failed": [], 
          "deps": []
        }, 
        "succeeded": true
      }
    }
  }, 
...

This is what you get now (this time with kernel!):

...
  "result": {
    "num_changes": 4, 
    "reboot": {
      "scheduled": false, 
      "details": {}
    }, 
    "succeeded": true, 
    "details": {
      "rpm": {
        "details": {
          "resolved": [
            {
              "name": "kernel-tools-libs", 
              "qname": "kernel-tools-libs-3.10.0-327.10.1.el7.x86_64", 
              "epoch": "0", 
              "version": "3.10.0", 
              "release": "327.10.1.el7", 
              "arch": "x86_64", 
              "repoid": "rhel7"
            }, 
            {
              "name": "python-perf", 
              "qname": "python-perf-3.10.0-327.10.1.el7.x86_64", 
              "epoch": "0", 
              "version": "3.10.0", 
              "release": "327.10.1.el7", 
              "arch": "x86_64", 
              "repoid": "rhel7"
            }, 
            {
              "name": "kernel", 
              "qname": "kernel-3.10.0-327.10.1.el7.x86_64", 
              "epoch": "0", 
              "version": "3.10.0", 
              "release": "327.10.1.el7", 
              "arch": "x86_64", 
              "repoid": "rhel7"
            }, 
            {
              "name": "kernel-tools", 
              "qname": "kernel-tools-3.10.0-327.10.1.el7.x86_64", 
              "epoch": "0", 
              "version": "3.10.0", 
              "release": "327.10.1.el7", 
              "arch": "x86_64", 
              "repoid": "rhel7"
            }
          ], 
          "failed": [], 
          "deps": []
        }, 
        "succeeded": true
      }
    }
  }, 
...

[0]: http://yum.baseurl.org/gitweb?p=yum.git;a=blob;f=yum/config.py;h=6bd8d24f709f5b7f45e64ede5e66650ac2701466;hb=d15697ca2b6a74701e900e5f36396dc23a024651#l762
[1]: http://yum.baseurl.org/gitweb?p=yum.git;a=blob;f=yum/transactioninfo.py;h=8d47caabbaac91cca1706efd1630fc5fb30aacda;hb=d15697ca2b6a74701e900e5f36396dc23a024651#l453
[2]: http://yum.baseurl.org/gitweb?p=yum.git;a=blob;f=yum/transactioninfo.py;h=8d47caabbaac91cca1706efd1630fc5fb30aacda;hb=d15697ca2b6a74701e900e5f36396dc23a024651#l502