I'm working through the J primer, and getting stuck when it comes to the load command.
In particular, there are times when the next step in a tutorial is load 'foo' and I'll get an error like the following:
load 'plot'
not found: /users/username/j64-801/addons/graphics/plot/plot.ijs
|file name error: script
| 0!:0 y[4!:55<'y'
When I do ls /users/username/j64/addons/ I only have config and ide in there, so it's sensible that graphics is not found.
My question:
if given an example that says load 'foo', how do I go about finding and installing foo?
I'd recommend simply installing all the JAL packages ("Addons"). There aren't too many, so the download won't take long, and you'll have access to everything you need to run the Labs, Wiki examples, and any code posted by the community (e.g. on the J Forums).
To install all available Addons, type the following into Jconsole (you could theoretically type it into JHS or JQT instead, but since those are distributed as Addons, you might not be able to upgrade them while they're running):
load'pacman' NB. J PACkage MANager
install'all'
The package manager will start running, and you'll see output like:
Updating server catalog...
Installing 52 packages
Downloading base library...
Installing base library...
Downloading api/gl3...
Installing api/gl3...
Downloading api/ncurses...
Installing api/ncurses...
Then stop and restart Jconsole, and run:
load 'pacman'
'update' jpkg 'all'
To make sure all recursive dependencies were satisfied and all packages are up to date (in particular, the base library). Ultimately, you want to see something like:
Updating server catalog...
Local JAL information was last updated: <datetime>
All available packages are installed and up to date.
Then stop & restart J one last time. When that's done, you should have everything you need to run the Labs.
To answer your final question, if you see a line like:
load'foo'
The first thing you should do is run getscripts_j_ 'foo'. In your example:
getscripts_j_ 'plot'
+--------------------------------------------------------------+
|c:/users/user/j64-801/addons/graphics/plot/plot.ijs|
+--------------------------------------------------------------+
Here, you can see the fully-qualified path of where J expects the package to live.
In particular, you can see it where it is relative to the addons directory, which will always be in the form addons/category/module/foo.ijs. The category and module name indicate which addon you need to install, so all you have to do pick the desired entry from the catalog visible in the package manager.
Related
Here is a weird problem i'm facing; after updating Joomla to the latest version, website failed to up load but, as i've made a backup manually from these folders:
administrator
bin
cli
components
includes
layouts
libraries
modules
plugins
yt-assets
and all the root files, after restoring the backup still the website is not loading and just says
"Fatal error: Cannot redeclare jblogerror() in on line 0" !
Any suggestion? Thank you.
Apparently, the version of jBlog you are using is loading its attempting to load its own classes twice.
Let's assume the jBlog developers already fixed it and you carelessly ignored the warning to ensure all your extensions are compatible before updating.
Are you able to access administrator? Simply go there and upgrade jBlog including any modules.
Else, the issue lies within a plugin. In order to access the administrator and perform the update, you will need to manually disable the offending plugin.
A simple way is to rename its folder: start from plugins/system then plugins/content hopefully you'll have spotted it by then. Look into the subfolders of each and spot any that may be relevant to jBlog (or grep through the folder to locate the specific string)
If you have console access, simply run
# grep -rl jblogerror plugins/system
and you should see all the files that include such string, just rename their main plugin folder. But you could also do all this through ftp and guessing.
I am a newbie in go and go-swagger. I am following steps in Simple Server tutorial in goswagger.io.
I am using Ubuntu 18.04, swagger v0.25.0 and go 1.15.6.
Following the same steps, there are a few differences of the files generated. For instance, goswagger.io's has find_todos_okbody.go and get_okbody.go in models but mine does not. Why is that so?
Link to screenshot of my generated files vs
Link to screenshot of generated files by swagger.io
Starting the server as written in the tutorial go install ./cmd/todo-list-server/ gives me the following error. Can anyone please help with this?
# my_folder/swagger-todo-list/restapi
restapi/configure_todo_list.go:41:8: api.TodosGetHandler undefined (type *operations.TodoListAPI has no field or method TodosGetHandler)
restapi/configure_todo_list.go:42:6: api.TodosGetHandler undefined (type *operations.TodoListAPI has no field or method TodosGetHandler)
The first step in goswagger.io todo-list is swagger init spec .... Which directory should I run this command in? I ran it in a newly created folder in my home directory. However, from the page, it shows the path to be ~/go/src/github.com/go-swagger/go-swagger/examples/tutorials/todo-list. I am not sure whether I should use go get ..., git clone ... or create those folders. Can someone advise me?
Thanks.
This is likely the documentation lagging behind the version of the code that you are running. As long as it compiles, the specific files the tool generates isn't so crucial.
This is a compilation error. When you do go install foo it will try to build the foo package as an executable and then move that to your GOPATH/bin directory. It seems that the generated code in restapi/configure_todo_list.go isn't correct for the operations code generated.
All you need to run this tutorial yourself is an empty directory and the swagger tool (not its source code). You run the commands from the root of this empty project. In order not to run into GOPATH problems I would initialise a module with go mod init todo-list-example before doing anything else.
Note that while the todo-list example code exists inside the go-swagger source, it's there just for documenting example usage and output.
What I would advice for #2 is to make sure you're using a properly released version of go-swagger, rather than installing from the latest commit (which happens when you just do a go get), as I have found that to be occasionally unstable.
Next, re-generate the entire server, but make sure you also regenerate restapi/configure_todo_list.go by passing --regenerate-configureapi to your swagger generate call. This file isn't always refreshed because you're meant to modify it to configure your app, and if you changed versions of the tool it may be different and incompatible.
If after that you still get the compilation error, it may be worth submitting a bug report at https://github.com/go-swagger/go-swagger/issues.
Thanks #EzequielMuns. The errors in #2 went away after I ran go get - u -f ./... as stated in
...
For this generation to compile you need to have some packages in your GOPATH:
* github.com/go-openapi/runtime
* github.com/jessevdk/go-flags
You can get these now with: go get -u -f ./...
I think it's an error of swagger code generation. You can do as folloing to fix this:
delete file configure_todo_list.go;
regenerate code.
# swagger generate server -A todo-list -f ./swagger.yml
Then, you can run command go install ./cmd/todo-list-server/, it will succeed.
I need to configure WireGuard to bring up a VPN on boot on an Embedded Linux device.
My recipe installs a /etc/wireguard/wg0.conf pretty much like the examples found through the Internet.
Then I try to enable the service on SystemD like this on my wireguard.bb:
SYSTEMD_SERVICE = "wg-quick#wg0.service"
SYSTEMD_AUTO_ENABLE = "enable"
But bitbake throws me an error:
ERROR: Function failed: SYSTEMD_SERVICE_my-conf value wg-quick#wg0.service does not exist
I checked the temporary directory and file wg0.conf appears in the correct places but it seems that bitbake's SYSTEMD_SERVICE doesn't know how to expand the "wg0" after # sign.
If I try without the interface name (wg0):
SYSTEMD_SERVICE = "wg-quick#.service"
Bitbake is happy and finalizes my recipe, but it is not what systemd is expecting. Starting a service without an interface makes no sense...
Then I tried another approach and split the "wireguard" package itself from the configuration ("wireguard-conf" package) and added DEPENDS and RDEPENDS on "wireguard".
This got even worse since my wireguard-conf.bb recipe does not contain a "wg-quick#.service" file (it comes from the dependency "wireguard").
Well,
I don't know how to properly fix it and any suggestions will be highly appreciated.
Additional Info
I am using Yocto 2.0.3 in this project (with no hope of updating it).
Thanks to #TomasNovotny comments I managed to compare my "systemd.bbclas" against Github and noticed a change in systemd_populate_packages() that seems to solve the problem.
It works in newer OpenEmbedded (looks like in krogoth, version 2.1 released Apr 2016) and it is introduced by this commit. It works for me in rocko (version 2.4 released Oct 2017). According to j4x's comment, it doesn't work in jethro (version 2.0, Nov 2015).
For older (and currently unsupported OpenEmbeddeds) you can try to backport the patch or handle the symlinks for enabling the service in do_install().
Also please note that SYSTEMD_SERVICE_${PN} variable is package specific, so the _${PN} suffix has to be added (see manual).
I've also tried to enable OpenVPN with my profile (in Yocto rocko) without success.
Finally, I've made it working by providing OpenVPN recipe extension instead of custom one. So, the openvpn_%.bbappend file looks like:
inherit systemd
SYSTEMD_SERVICE_${PN} = "openvpn#clientprofile.service"
SYSTEMD_AUTO_ENABLE = "enable"
do_install_append() {
install -d ${D}${sysconfdir}/openvpn/
ln -sf /data/etc/openvpn/clientprofile.conf ${D}${sysconfdir}/openvpn/clientprofile.conf
}
As you can see, I'm using a symlink to my profile instead of the normal file. You can install a normal OpenVPN profile file instead of making symlink and it also works fine.
I have created a go script that compiles, starts, checks the status, and ends a web service I created (that is also in go). However, I have come to a road block.
With the compile feature I run the following command:
go install .
Which gives the following error:
./script.go:55: main redeclared in this block
previous declaration at ./hello.go:8
Which makes sense as I have two different files, both with the main func and main package. I also tried moving the script to another folder and then changing the command ran to:
go install {path}
Where {path} is equal to the path I want installed/compiled. Which I then got the following error:
exit status 1: can't load package: package /var/www/test.com/go: import "/var/www/test.com/go": cannot import absolute path
So in conclusion I have thought of only one solution (and I am up to hear others if mine isn't the best approach). My idea is to exclude the script file from compiling with the rest of the files, but I am unsure how to.
I did some research and couldn't find an easy way to do it (such as an --exclude flag with the go install command). Does anybody know how to accomplish what I am trying to achieve?
Thank you.
you could give the hello.go a different package name, that should work. Or i am missing something?
Regards
Tim
I searched the net and handbook, but I only managed to learn what is the masked package, and not how to install it. I did find some commands, but they don't seem to work on 2008 (looking at it, it seems those are for earlier versions). I have something like this:
localhost ~ # emerge flamerobin
Calculating dependencies
!!! All ebuilds that could satisfy "dev-db/flamerobin" have been masked.
!!! One of the following masked packages is required to complete your request:
- dev-db/flamerobin-0.8.6 (masked by: ~x86 keyword)
- dev-db/flamerobin-0.8.3 (masked by: ~x86 keyword)
I would like to install version 0.8.6, but don't know how? I found some instructions, but they tell me to edit or write to some files under /etc/portage. However, I don't have /etc/portage on my system:
localhost ~ # ls /etc/portage
ls: cannot access /etc/portage: No such file or directory
There are two different kinds of masks in gentoo. Keyword masks and package masks. A keyword mask means that the package is either not supported (or untested) by your architecture, or still in testing. A package mask means that the package is masked for another reason (and for most users it is not smart to unmask). The solutions are:
Add a line to /etc/portage/package.keywords (Check man portage in the package.keywords section). This is for the keyword problems.
Add a line to /etc/portage/package.unmask for "package.mask" problems (you can also use package.mask for the converse). This is in the same man file, under the section package.unmask. I advise to use versioned atoms here to avoid shooting in your own foot with really broken future versions a couple of months down the line.
These days there's also a more 'automated' solution, called "autounmask". No more file editing needed to unmask!
The great benefit of the package is, it also unmasks / handles keywords of dependencies if needed. It's provided in the package app-portage/autounmask.
/etc/portage/package.keywords and
/etc/portage/package.unmask
can be directories as well nowadays (but autounmask handles single files as well). In those directories, multiple can place multiple "autounmask" files, one file in each dir per "unmask"-package. If you use single files instead of dirs, 'autounmask' will place some kind of header / footer, and this way it becomes easy to remove "unmasks" if wanted.
Simply mkdir /etc/portage and edit as mentioned here: http://gentoo-wiki.com/TIP_Dealing_with_masked_packages#But_you_want_to_install_the_package_anyway...