[v7r3] Support running dirac-configure without arguments

[chrisburr]

This PR uses prompt-toolkit (a dependency of IPython) to improve the CLI interactions. As this inherently interactive I've included videos of how it looks. If this is accepted I'll add prompt-toolkit to DIRACOS (it's already there, but I'll make it an explicit dependency).

• 803e53b: Gets rid of the globals used by dirac-configure. I could easily rebase this commit out of this PR if desired.

• c12c515: Use prompt-toolkit to read the certificate password instead of plain getpass. This fixes the long standing bug that pressing Control + C while typing your password breaks the prompt. (moved to [v7r2] Use prompt_toolkit for reading passwords #5004)

dirac-proxy-init-example.mov

• 5687a7a: If dirac-configure is ran without any arguments with a Python 3 installation it will suggest setups and CS URLs using the extension_metadata. Python 2 based installations are unaffected.

dirac-configure-example.mov

BEGINRELEASENOTES

*Core
FIX: Handle SIGINT correctly when reading certificate passwords
NEW: dirac-configure can now be ran without arguments when using Python 3

ENDRELEASENOTES

[fstagni]

We are really towards making the releasing of v7r2, and while this is a nice addition it's also a not necessary as of now. I would target v7r3 if you don't mind.

[chrisburr]

I'd be tempted to at least target c12c515 for v7r2 as it's a tiny change and fixes a problem that affects me almost every day.

[fstagni]

I'd be tempted to at least target c12c515 for v7r2 as it's a tiny change and fixes a problem that affects me almost every day.

That requires a release of DIRACOS and DIRACOS2

[chrisburr]

That requires a release of DIRACOS and DIRACOS2

It doesn't, prompt-toolkit is already there as a transitive dependency from ipython (if it wasn't the CI would be failing).

We shouldn't rely on transitive dependencies for future releases in case it's ever removed but that's only a problem for future releases.

[fstagni]

That requires a release of DIRACOS and DIRACOS2

It doesn't, prompt-toolkit is already there as a transitive dependency from ipython (if it wasn't the CI would be failing).

We shouldn't rely on transitive dependencies for future releases in case it's ever removed but that's only a problem for future releases.

A-ha, good to know. Then go ahead.

[petricm]

what about the <<< passwords in the CI and similar places?

[chrisburr]

what about the <<< passwords in the CI and similar places?

Do you mean when reading from stdin? If so there is already a dedicated flag for doing that and disabling this:

DIRAC/src/DIRAC/FrameworkSystem/Client/ProxyUpload.py

Line 94 in ebf6678

Script.registerSwitch("p", "pwstdin", "Get passwd from stdin", self.setStdinPasswd)

[petricm]

I mean this dirac-proxy-init <<< $CERT_PASSPHRASE

[petricm]

There are several places like this around

[atsareg]

I do not think you can redirect password from stdin. I do not think it was ever possible, never used it this way.

[chrisburr]

I mean this dirac-proxy-init <<< $CERT_PASSPHRASE

Yes it does, albeit with a warning:

Generating proxy...
Warning: Input is not a terminal (fd=0).
^[[39;1REnter Certificate password: **********************************
Uploading proxy..
Proxy generated:

[fstagni]

Some conflicts, please rebase.

[chrisburr]

@fstagni Done