Badge does not appear in iterm2 after logging to remote GCP GCE VM Instance.

[Kaushal Shriyan]

Hi,

I have the below server hosted in GCP ( Google Cloud Platform) https://cloud.google.com/compute/docs/instances

$gcloud compute ssh jenkins-test to login to the remote server I get the below prompt

[kaushal@jenkins-test ~]$

[kaushal@jenkins-test ~]$ hostname
jenkins-test
[kaushal@jenkins-test ~]$

I have set badge and trigger to display text label that appears in the top right of a terminal session to provide dynamic status the current host name

Badge

\(session.username)@\(session.hostname)

Trigger

^\[(\w+)@(\w+) [~\w_.-]+\]\$    Report User & Host     \1@\2

^\[(\w+)@(\w+) [~\w_.-]+\]#    Report User & Host      \1@\2

^(\w+)@([\w]+):[\w+~_/]+\$    Report User & Host      \1@\2

But I do not see the badge as kaushal@jenkins-test appearing when i login using the below gcloud command

$gcloud compute ssh jenkins-test

Please guide me. Am I missing anything? Thanks in Advance.

Best Regards,

Kaushal

[Adrian Bool]

Hi Kaushal,

It may be down the hostname of your GCP server.

Your regex is trying to match the hostname with \w+ (one or more word characters) but the '-' in 'jenkins-test' isn't counted as a word character; so no match:

>>> re.match(r'^\w+$', 'jenkins')

<re.Match object; span=(0, 7), match='jenkins'>

>>> re.match(r'^\w+$', 'jenkins-test')

>>>

Try a trigger of:

^\[(\S+)@(\S+) .*\]    Report User & Host     \1@\2

This seems to match your prompt:

>>> match = re.match(r'^\[(\S+)@(\S+) .*\]', '[kaushal@jenkins-test ~]')

>>> match.group(0)

'[kaushal@jenkins-test ~]'

>>> match.group(1)

'kaushal'

>>> match.group(2)

'jenkins-test'

Good luck!

aid

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[Kaushal Shriyan]

On Saturday, 19 November 2022 at 19:25:28 UTC+5:30 a...@logic.org.uk wrote:

Hi Kaushal,

It may be down the hostname of your GCP server.

Your regex is trying to match the hostname with \w+ (one or more word characters) but the '-' in 'jenkins-test' isn't counted as a word character; so no match:

>>> re.match(r'^\w+$', 'jenkins')

<re.Match object; span=(0, 7), match='jenkins'>

>>> re.match(r'^\w+$', 'jenkins-test')

>>>

Try a trigger of:

^\[(\S+)@(\S+) .*\]    Report User & Host     \1@\2

This seems to match your prompt:

>>> match = re.match(r'^\[(\S+)@(\S+) .*\]', '[kaushal@jenkins-test ~]')

>>> match.group(0)

'[kaushal@jenkins-test ~]'

>>> match.group(1)

'kaushal'

>>> match.group(2)

'jenkins-test'

Good luck!

aid

Thanks a lot aid and it worked perfectly. Appreciate it.

Best Regards,

Kaushal

[Adrian Bool]

Hi,

Here's an updated regex that should match on username, hostname and directory for a number of different hosts/shells:

^\[?(\w+)@([\w\d-]+)[:\s]([\w~/ ]*[\w~/]+)\]?(?:\s%|\s#|\$|#)\s

(If you're using it for Report Directory; be sure to use "\3" as the substitution.)

I've created some test cases for it; which is now sitting on github at:

https://github.com/aid/shell_prompt_re

Cheers,

aid