Issue, `label` Directive - fails to work when directive `output: prefixed` in Taskfile

[dsbitor]

Problem:

The directive label's function is to allow a task to output a
text string, other than the task name when the task is executed.

In the official documentation states that label:

'Overrides the name of the task in the output when a task is
run. Supports variables.'

If the label directive is set for a task, say to Hello
with label: 'Hello' and the directive output: prefixed is
also included in the Taskfile, the output is not as expected.

Further, the outcome is the same if the label text is set
dynamically using a Task variable.

See the section 'Analysis' below.

Test Taskfile.yml

The Taskfile below contains two tasks one where label is a static
string and one task where the label is from a dynamically loaded
task variable.

	version: '3'
	
	output: prefixed
	
	vars:
	  VERSION: '0.2'
	  BACKUP_TIME:
	    sh: date +"%Y-%m-%d_%H:%M:%S"
	  SYSTEM_ID:
	     sh: |
	         hostname
	  BACKUP_ID: '{{.SYSTEM_ID}}_{{.BACKUP_TIME}}'
	
	tasks:
	  default:
	    # Predefined string for label
	    label:   'Hello'
	    desc: Display Task variables
	    cmds:
	      - |
	        echo "HostName:"{{.SYSTEM_ID}}
	        echo "Backup_Time:"{{.BACKUP_TIME}}
	        echo "Backup ID:" {{.SYSTEM_ID }}{{.BACKUP_TIME}}
	        echo "Version:" {{.VERSION}}
	
	  dynamic:
	    # Dynamic string for label
	    label: '{{.BACKUP_ID}}'
	    desc: Display Task variables with label set dynamically
	    cmds:
	      - |
	        echo "HostName:"{{.SYSTEM_ID}}
	        echo "Backup_Time:"{{.BACKUP_TIME}}
	        echo "Backup ID:" {{.SYSTEM_ID }}{{.BACKUP_TIME}}
	        echo "Backup ID 2:" {{.VERSION}}

Output Generated and expected

Output generated from the task default:

	task: [Hello] echo "HostName:"MBP.local
	echo "Backup_Time:"2022-11-14_13:41:47
	echo "Backup ID:" MBP.local2022-11-14_13:41:47
	echo "Version:" 0.2
	
	[default] HostName:MBP.local
	[default] Backup_Time:2022-11-14_13:41:47
	[default] Backup ID: MBP.local2022-11-14_13:41:47
	[default] Version: 0.2

Output expected from the task default:

	task: [Hello] echo "HostName:"MBP.local
	echo "Backup_Time:"2022-11-14_13:41:47
	echo "Backup ID:" MBP.local2022-11-14_13:41:47
	echo "Version:" 0.2
	
	[Hello] HostName:MBP.local
	[Hello] Backup_Time:2022-11-14_13:41:47
	[Hello] Backup ID: MBP.local2022-11-14_13:41:47
	[Hello] Version: 0.2

Output generated from the task dynamic:

	task: [MBP.local_2022-11-14_13:42:39] echo "HostName:"MBP.local
	echo "Backup_Time:"2022-11-14_13:42:39
	echo "Backup ID:" MBP.local2022-11-14_13:42:39
	echo "Backup ID 2:" 0.2
	
	[dynamic] HostName:MBP.local
	[dynamic] Backup_Time:2022-11-14_13:42:39
	[dynamic] Backup ID: MBP.local2022-11-14_13:42:39
	[dynamic] Backup ID 2: 0.2

Output expected from the task dynamic:

	task: [MBP.local_2022-11-14_13:42:39] echo "HostName:"MBP.local
	echo "Backup_Time:"2022-11-14_13:42:39
	echo "Backup ID:" MBP.local2022-11-14_13:42:39
	echo "Backup ID 2:" 0.2
	
	[MBP.local_2022-11-14_13:42:39] HostName:MBP.local
	[MBP.local_2022-11-14_13:42:39] Backup_Time:2022-11-14_13:42:39
	[MBP.local_2022-11-14_13:42:39] Backup ID: MBP.local2022-11-14_13:42:39
	[MBP.local_2022-11-14_13:42:39] Backup ID 2: 0.2

Analysis

The label directive works for both static and dynamic
values and does label the first instance of the task name as
seen in line 1 of both sets of output.

The label directive does not output the substitute name
in the output strings from the echo commands, as requested by
output prefixed directive. The output reverts to the
task name.

• Task Version 3.17
• Operating System: OS X Version Monterey 12.6

[christerswahn]

This is a quite old issue but the bug is still there. Can this be bumped?

[trulede]

You can set the prefix for command output by setting the prefix of the task. The label is used to give the task itself a different name. These two settings have different semantics, in many cases label will be combined with some vars to circumvent other limitations relating to run and sources.

If you want to set both to the same value, that is OK too.