Change behavior of register directive to apply it to all following tasks

[umputun]

currently, exporting a var or setting them to register acts the same way - making the var available for other commands in the given task. I think this is the correct logic for set var, but incorrect for register. The proposed change will update all the following tasks by injecting register vars into them.

see #195 (reply in thread) for more details

[umputun]

@koolay - the change in place on the :master image. Pls, give it a try and see if it fixes the reported issue

[koolay]

Hi, it is not work when target host is not on the same host.
@umputun

[umputun]

The change shouldn't be tied to any target host but rather propagate it to all the tasks. If it doesn't work for you, please provide the playbook and output of the spot with --dbg and -v.

This is the one I have tested and it worked as expected:

user: umputun
ssh_key: ~/.ssh/id_rsa

targets:
  dev1:
    hosts: [{host: "dev1.umputun.dev", name: "dev1"}]
  dev2:
    hosts: [{host: "dev2.umputun.dev", name: "dev2"}]

tasks:
  - name: first
    targets: ["dev1"]
    commands:
      - name: get host name
        script: |
            myhost=$(hostname)
        register: [myhost]

  - name: second
    targets: ["dev2"]
    commands:
      - name: show host name
        script: |
            echo "show myhost var: $myhost"

[dev1 dev1.umputun.dev:22] run task "first", commands: 1
[dev1 dev1.umputun.dev:22] run command "get host name"
[dev1 dev1.umputun.dev:22]  > /bin/sh -c /tmp/.spot-8947750978994702336/spot-script1300844333
[dev1 dev1.umputun.dev:22]  > setvar myhost=dev1.umputun.dev
[dev1 dev1.umputun.dev:22] completed command "get host name" {script: /bin/sh -c [multiline script]} (79ms)
[dev1 dev1.umputun.dev:22] completed task "first", commands: 1 (150ms)
[dev2 dev2.umputun.dev:22] run task "second", commands: 1
[dev2 dev2.umputun.dev:22] run command "show host name"
[dev2 dev2.umputun.dev:22]  > /bin/sh -c 'myhost="dev1.umputun.dev"; echo "show myhost var: $myhost"'
[dev2 dev2.umputun.dev:22]  > show myhost var: dev1.umputun.dev
[dev2 dev2.umputun.dev:22] completed command "show host name" {script: /bin/sh -c 'myhost="dev1.umputun.dev"; echo "show myhost var: $myhost"'} (8ms)
[dev2 dev2.umputun.dev:22] completed task "second", commands: 1 (91ms)

As you can see, myhost was set on dev1 and later echoed on dev2.

[koolay]

@umputun
I have found the why. I use spot as lib. The main.go has changed, I should update my code also.