You are looking for `await`, if you use starter kit you have it already configured. With it you can "wait" for a promisse to complete, Take a look here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Stateme... Em qua, 9 de jan de 2019 às 18:52, . <magicznykrag(a)gmail.com&gt; escreveu: > Hello, > First of all: thank you very much for maintaining this great project! > > I'm C programmer learning now Cockpit. My problem is as follows: for some > of the operation I must use external helper and I must wait for it output. > The cockpit.spawn() function returns the promise, which is non-blocking > operation (as expected). How can I make it work as blocking one? Which > mean: the rest of the code in the function should be done after receiving > full output of the cockpit.spawn (done() or fail()) > > best regards, > Magik > > _______________________________________________ > cockpit-devel mailing list -- cockpit-devel(a)lists.fedorahosted.org > To unsubscribe send an email to > cockpit-devel-leave(a)lists.fedorahosted.org > Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: > https://lists.fedorahosted.org/archives/list/cockpit-devel@lists.fedoraho... > -- “If you're going to try, go all the way. Otherwise, don't even start. ..." Charles Bukowski _______________________________________________ cockpit-devel mailing list -- cockpit-devel(a)lists.fedorahosted.org To unsubscribe send an email to cockpit-devel-leave(a)lists.fedorahosted.org Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedorahosted.org/archives/list/cockpit-devel@lists.fedoraho...

It's not required but is a big shortcut.. The newer browsers support async, you can try it without Babel, it's up to you Em qua, 9 de jan de 2019 7:04 PM, . <magicznykrag(a)gmail.com escreveu: > Daniel, > > Thank you very much for the answer! I was not using starter-pack, I've > just started with creating direct on the server the manifest, html, css and > js files. I'm not using npm at all. Is is required for Cockpit > functionality? > Of course I'll give starter-pack a try at once. > > Magik > > > śr., 9 sty 2019 o 21:55 Daniel. <danielhilst(a)gmail.com&gt; napisał(a): > >> You are looking for `await`, if you use starter kit you have it already >> configured. With it you can "wait" for a promisse to complete, >> >> Take a look here: >> https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Stateme... >> >> Em qua, 9 de jan de 2019 às 18:52, . <magicznykrag(a)gmail.com&gt; escreveu: >> >>> Hello, >>> First of all: thank you very much for maintaining this great project! >>> >>> I'm C programmer learning now Cockpit. My problem is as follows: for >>> some of the operation I must use external helper and I must wait for it >>> output. The cockpit.spawn() function returns the promise, which is >>> non-blocking operation (as expected). How can I make it work as blocking >>> one? Which mean: the rest of the code in the function should be done after >>> receiving full output of the cockpit.spawn (done() or fail()) >>> >>> best regards, >>> Magik >>> >>> _______________________________________________ >>> cockpit-devel mailing list -- cockpit-devel(a)lists.fedorahosted.org >>> To unsubscribe send an email to >>> cockpit-devel-leave(a)lists.fedorahosted.org >>> Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html >>> List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines >>> List Archives: >>> https://lists.fedorahosted.org/archives/list/cockpit-devel@lists.fedoraho... >>> >> >> >> -- >> “If you're going to try, go all the way. Otherwise, don't even start. >> ..." >> Charles Bukowski >> _______________________________________________ >> cockpit-devel mailing list -- cockpit-devel(a)lists.fedorahosted.org >> To unsubscribe send an email to >> cockpit-devel-leave(a)lists.fedorahosted.org >> Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html >> List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines >> List Archives: >> https://lists.fedorahosted.org/archives/list/cockpit-devel@lists.fedoraho... >> > _______________________________________________ > cockpit-devel mailing list -- cockpit-devel(a)lists.fedorahosted.org > To unsubscribe send an email to > cockpit-devel-leave(a)lists.fedorahosted.org > Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: > https://lists.fedorahosted.org/archives/list/cockpit-devel@lists.fedoraho... > _______________________________________________ cockpit-devel mailing list -- cockpit-devel(a)lists.fedorahosted.org To unsubscribe send an email to cockpit-devel-leave(a)lists.fedorahosted.org Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedorahosted.org/archives/list/cockpit-devel@lists.fedoraho...

Note that for using it you need to enable it support on babel, welcome to modern javascript, these are the pieces of software that I recommend you to get familiar with it: Webpack and Babel. Webpack will bundle all your javascript (css and other stuff) in a single bundle. Babel will let you to develop on newer versions of javascript that would not be available on old browsers, and it will transpile to old javascript Em qua, 9 de jan de 2019 às 18:52, . <magicznykrag(a)gmail.com&gt; escreveu: > Hello, > First of all: thank you very much for maintaining this great project! > > I'm C programmer learning now Cockpit. My problem is as follows: for some > of the operation I must use external helper and I must wait for it output. > The cockpit.spawn() function returns the promise, which is non-blocking > operation (as expected). How can I make it work as blocking one? Which > mean: the rest of the code in the function should be done after receiving > full output of the cockpit.spawn (done() or fail()) > > best regards, > Magik > > _______________________________________________ > cockpit-devel mailing list -- cockpit-devel(a)lists.fedorahosted.org > To unsubscribe send an email to > cockpit-devel-leave(a)lists.fedorahosted.org > Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: > https://lists.fedorahosted.org/archives/list/cockpit-devel@lists.fedoraho... > -- “If you're going to try, go all the way. Otherwise, don't even start. ..." Charles Bukowski _______________________________________________ cockpit-devel mailing list -- cockpit-devel(a)lists.fedorahosted.org To unsubscribe send an email to cockpit-devel-leave(a)lists.fedorahosted.org Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedorahosted.org/archives/list/cockpit-devel@lists.fedoraho...

Hello Magik, . [2019-01-09 21:51 +0100]: > I'm C programmer learning now Cockpit. My problem is as follows: for some > of the operation I must use external helper and I must wait for it output. > The cockpit.spawn() function returns the promise, which is non-blocking > operation (as expected). How can I make it work as blocking one? Which > mean: the rest of the code in the function should be done after receiving > full output of the cockpit.spawn (done() or fail()) This is a common pitfal when coming from the world of synchronous programming languages (such as C or Python) and starting with asynchronous JavaScript. Daniel's await proposal can certainly help to make async code look like it was written in a sync style; but honestly, it's really best to let go of this pattern when writing JS. So instead of output = cockpit.spawn(..).make_this_magically_sync(); followup_action(output); actually use JavaScript promises as they are intended: cockpit.spawn(..) .then(output => { followup_action(output); }) .catch(err => { console.error(err); }); i. e. organize the stuff that depends on the result into promise handlers. Martin _______________________________________________ cockpit-devel mailing list -- cockpit-devel(a)lists.fedorahosted.org To unsubscribe send an email to cockpit-devel-leave(a)lists.fedorahosted.org Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedorahosted.org/archives/list/cockpit-devel@lists.fedoraho...

What interesting: if I define .then just as: .then(alert("in .then")); then it works fine. But if i use the function() inside or the notation you've provided: .then(output => { alert(output); }); then system never reaches the .then. What I'm doing wrong? pt., 11 sty 2019 o 20:44 . <magicznykrag(a)gmail.com&gt; napisał(a): > Martin, > > Thank you very much for the answer! Unfortunately I'm still stuck :-( > Please take a look at the following code and tell me why it's still > asynchronous. It display properly messages: "testFunct" and then "end of > testFunct", but it never reach the .then or .done. > Thank you in advance! > > function testFunc() { > alert("testFunc"); > lic = cockpit.spawn([ > "/usr/share/cockpit/testSoftware/connectExternalSystem"], { > directory: "/usr/share/cockpit/testSoftware", > err: "message" > }) > .then(function() { > alert("in .then of testFunc. Error: "+message); > }) > .done(function() { > alert("in .done of testFunc. Error: "+message); > }); > alert("end of testFunc"); > } > > czw., 10 sty 2019 o 09:02 Martin Pitt <martin(a)piware.de&gt; napisał(a): > >> Hello Magik, >> >> . [2019-01-09 21:51 +0100]: >> > I'm C programmer learning now Cockpit. My problem is as follows: for >> some >> > of the operation I must use external helper and I must wait for it >> output. >> > The cockpit.spawn() function returns the promise, which is non-blocking >> > operation (as expected). How can I make it work as blocking one? Which >> > mean: the rest of the code in the function should be done after >> receiving >> > full output of the cockpit.spawn (done() or fail()) >> >> This is a common pitfal when coming from the world of synchronous >> programming >> languages (such as C or Python) and starting with asynchronous >> JavaScript. >> Daniel's await proposal can certainly help to make async code look like >> it was >> written in a sync style; but honestly, it's really best to let go of this >> pattern when writing JS. >> >> So instead of >> >> output = cockpit.spawn(..).make_this_magically_sync(); >> followup_action(output); >> >> actually use JavaScript promises as they are intended: >> >> cockpit.spawn(..) >> .then(output => { >> followup_action(output); >> }) >> .catch(err => { >> console.error(err); >> }); >> >> i. e. organize the stuff that depends on the result into promise >> handlers. >> >> Martin >> _______________________________________________ >> cockpit-devel mailing list -- cockpit-devel(a)lists.fedorahosted.org >> To unsubscribe send an email to >> cockpit-devel-leave(a)lists.fedorahosted.org >> Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html >> List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines >> List Archives: >> https://lists.fedorahosted.org/archives/list/cockpit-devel@lists.fedoraho... >> >

Hello Magic, . [2019-01-11 20:44 +0100]: > Thank you very much for the answer! Unfortunately I'm still stuck :-( > Please take a look at the following code and tell me why it's still > asynchronous. It display properly messages: "testFunct" and then "end of > testFunct", but it never reach the .then or .done. Seems you eventually figured it out on your own, but FTR: > function testFunc() { > alert("testFunc"); > lic = cockpit.spawn([ > "/usr/share/cockpit/testSoftware/connectExternalSystem"], { > directory: "/usr/share/cockpit/testSoftware", > err: "message" > }) > .then(function() { > alert("in .then of testFunc. Error: "+message); > }) Note that this only gets called if connectExternalSystem succeeds -- *message* is not defined here, so this can't work. What you want is .then(output => alert("finished, output:", output)) .catch(error => alert("failed, error:", error); > .done(function() { > alert("in .done of testFunc. Error: "+message); > }); And this makes no ssense at all -- alert doesn't return a promise, to calling .done() on alert()'s result also doesn't work. Martin _______________________________________________ cockpit-devel mailing list -- cockpit-devel(a)lists.fedorahosted.org To unsubscribe send an email to cockpit-devel-leave(a)lists.fedorahosted.org Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedorahosted.org/archives/list/cockpit-devel@lists.fedoraho...