When I try to run any Go script it show me this error
I installed go lang step by step from this link
https://www.tecmint.com/install-go-in-linux/
When I setup go script like this
go get github.com/tomnomnom/waybackurls
I got error like this
github.com/tomnomnom/waybackurls
src/github.com/tomnomnom/waybackurls/main.go:191: u.Hostname undefined
(type *url.URL has no field or method Hostname)
If you are following the guide you linked by copy-pasting commands, you will have installed Go 1.7.3. The function url.Hostname() was added in Go 1.8.
I suggest completely ignoring that guide. Remove /usr/local/go, remove ~/go_projects and undo the path related stuff.
Instead, use the package manager of your OS to install Go.
Most likely, this means you should do either sudo apt install golang (for Ubuntu, Debian, ...) or sudo dnf install golang (Fedora, CentOS, ...).
That will give you the latest version that is supported by distro maintainer (which at the moment is probably 1.11 or 1.12, depending on your distro).
As an alternative to the packagemanager, download the latest version from https://golang.org/dl/.
This approach also gives you an installation that follows the Go ecosystem their conventions for paths (I'm not sure if ~/go_projects was ever a think, but it isn't today).
Related
I am very new to golang. I am trying to work with the gomod. Trying to explore the go buffalo framework. But finding a bit of difficulty in installing that.
What I have done:
I saw that go get is nomore supported for buffalo and so switched to go modules.
Created a module by go mod init github.com/webbuffalotest
Fetched go get -v github.com/gobuffalo/buffalo (on the same directory where I have go.mod file)
Fetched go get -v github.com/mattn/go-sqlite3 (on the same directory where I have go.mod file)
go install github.com/gobuffalo/buffalo
I was expecting a buffalo.exe inside %GOPATH%/bin so that I can add it to my path but didn't find one.
My question is what's wrong? Is the exe not installed or it's somewhere else because of go mod. Any help will be highly appreciated.
I am using windows 10. I am not willing to install package managers as scoop or choco to install buffalo. Thanks for your patience :)
Edited:
Also tried setting set GO111MODULE=on but of no use.
Solved:
My bad, I should have used go install github.com/gobuffalo/buffalo/buffalo instead of go install github.com/gobuffalo/buffalo
github.com/gobuffalo/buffalo is a library; the corresponding binary is (aptly-named) github.com/gobuffalo/buffalo/buffalo.
The go install command you ran should have warned you about that, but didn't because go install used to also be used to cache compiled libraries (it no longer does that in module mode).
I've filed https://golang.org/issue/46912 to add a diagnostic.
I have installed the go language in my ubuntu using sudo apt install golang-go.
It was successfully installed. When i run go version I am getting go version go1.10.4 linux/amd64
but when i tried running go mod init projectName I am getting the following error go: unknown subcommand "mod"
Do I need to install mod package or am i missing something? I have implemented the solution given by christophe in this forum but it didn't work for me.
Preliminary module support was added in Go 1.11, so Go 1.10 knows no mod subcommand.
You need to install a newer, preferably the newest 1.14 version of Go. Get it from the official downloads page. Go 1.10 is not even supported anymore (doesn't receive security patches).
The prepared packages of OSes usually lag behind new releases. I'd advise to always get Go from the official page.
Because preliminary support for go-modules came in version 1.11 and 1.12.
More here
I suggest that you install using the linux build directly from golang
I am a new golang developer. My company uses go 1.10.2, and I hit following error during installing vim-go
Error installing golang.org/x/tools/cmd/gopls: # golang.org/x/tools/internal/lsp/source^#../../../golang.org/x/tools/internal/lsp/source/symbols.go:232:18: ti.EmbeddedType undefined (t
ype *types.Interface has no field or method EmbeddedType
It turns out due to the old go version. https://github.com/fatih/vim-go/issues/2246, https://github.com/golang/go/issues/31864. Since upgrade go version is not an option, the only choice I can think of is to install an old version vim-go that supports go 1.10.2. But I am not sure how to do so.
This is how I install vim-go now:
git clone https://github.com/fatih/vim-go.git ~/.vim/pack/plugins/start/vim-go
then open up vim and run :GoInstallBinaries (where above error show up)
Any suggestions would be great. Since I am neither a vim nor a go person before, more details would be appreciate!
You should try goenv it support multiple version of golang.
Here is the installation guide
https://github.com/syndbg/goenv/blob/master/INSTALL.md
And after installation you can choose and install any version from the list.
Just by typing..
goenv install 1.10.2
Solved it by cloning the repo and checkout to an old commit
Jython Package installation issue, using pip
Hi, I have installed Jython2.7 configured with pydev in eclipse neon, also configured python 3.6 package
I am able to install packages for python using pip installer?
pip install "packagename"
Below are some of the packages in python/Lib/Site-packages directory
I was able to install all the packages
How do I use pip installer to install packages for jython?
I tried to install Jip package with
jython install setup.py
The binary File got installed in the Jython/Lib/Site-packages folder
However, I am not able to use it.
where and how do I get Jython package binaries like jip?
Also, Please let me know how to search jython packages?
Also, How to make pip install library packages in jython?
Any other configuration like jython home, etc that should be made?
This answer is going to be really generic but I just recently have slogged my way through the setup for jython/jip/pip and here's roughly what I had to do.
Firstly, I'm running Windows 7 64 Bit from behind a proxy (work machine.)
Had to install jython 2.7.0 instead of 2.7.1 because (I think anyway) 2.7.1 requires admin privileges which I don't have on my work PC.
Pip didn't install correctly during the Jython installation and I spent an obscene amount of time trying to get it installed and functioning as I knew it from my cpython days. NOTE: Just because you get pip installed, doesn't mean you can use any package on a python package repo. As of 2.7.0, Jython doesn't have end to end capability to interpret/compile some libraries that rely on certain python wrappers of native OS function calls. I believe 2.7.1 makes solid progress in the direction of supporting all needed native calls but don't quote me on that. For example, I tried to use wxPython to make a simple GUI to test my jython install. Trying to install it from pip kept causing really non-specific error info that took me a lot of time to figure out that the cause was jython simply couldn't compile the wxPython source so beware.
I had to set environment variables 'http_proxy' and 'https_proxy' in the form of http://proxyhosturl:port and https://proxyhosturl:port respectively to get out from behind the proxies without having to invoke pip with the proxy switch every time I called it.
To actually install pip, have a look here. These instructions are for Python and Linux/Unix but the principle is roughly the same. Just use jython -m instead of python -m and ignore the '$' at the start of each command line.
Also be sure to CD to your python_home/bin folder when invoking the ez_install exe.
If that doesn't work (didn't for me), try using get-pip.py script with these instructions https://pip.pypa.io/en/stable/installing/ (remember jython instead of python etc.). Download it, cd to the download location and follow the noted install steps. Worth noting is about half way down the install instructions where it details installing from local archives (source/binary zip or tar.gz archives of pip and setuptools as better described here: https://packaging.python.org/tutorials/installing-packages/#installing-from-local-archives).
The links to the bin archives of pip and setuptools are here:
https://pypi.python.org/pypi/setuptools
https://pypi.python.org/pypi/pip
It may also be worth making sure that your PATH environment variable has the jython/bin path in the variable value. The jython installer should do this but, again, mine did not.
If all goes well, you should be able to invoke pip with the --version switch and if it prints a line with the installed pip version info then you should be good to go
Another quirky issue I had was I could invoke a function of pip one time and any subsequent times I would get a stack trace ending with something along the lines of an object not having a certain property. I fixed that by finding my temp directory by opening a windows explorer instance and typing %TEMP% in the address bar and hitting enter, it should take you to a subdir of your AppData folder and there you may see a folder with the name of the package you were trying to install and the text "_pip" somewhere in the directory name. Delete the directory and try the pip install command again. I had to do this + invoke pip install pip -U to update my install to the latest version. Then pip began behaving correctly in my instance.
pip search numpy (or your library name) will generate a list of results with the same logic it uses to locate your desired package when you call pip install but, again, just because it returns a matching package doesn't mean it will compile when you install it (numpy doesn't work because of the missing java to C native function calls I described earlier.) The trade off is that you can import code artifacts from Java JAR files in your Jython script files and leverage their functionality with relative ease. Between the public Java APIs available and the python packages that work with the jython interpretor, you can (in my experience) come up with a way to accomplish your task. See the following info on JIP, Maven and IDEs.
IDE and jython integration (Eclipse)
- If you are stuck using Eclipse (like me) it actually has pretty decent support for python development. Install the PyDev plugin for Eclipse from Help -> Install Software. Put in this URL https://marketplace.eclipse.org/content/pydev-python-ide-eclipse, hit tab, and select the PyDev plugin and hit 'finish.'
- Setup the jython interpretor info from Windows -> Preferences -> PyDev. Provide the path to your jython.jar file.
- You should now be able to use File -> New PyDev project to create a basic python project and configure it to use your version of Jython and Java.
Brief Overview of Jip and Maven
- jip is a jython package that is invoked very similarly to pip but instead will download JAR files from the Maven Central Repository instead of python packages from pypi.com, for example. See the install instructions described here. Note the install procedure for a global jip install which differ from just pip install jip. https://pypi.python.org/pypi/jip/
- I never got jip to work exactly as I wished because there's not a ton of documentation on it outside of what I already linked. However, if you install a JAR using jip, you have to go to your project in Eclipse and actually add the JARs themselves to your PYTHONPATH in order for import statements and editing to have intellisense and so that you don't get a classnotfound exception at runtime. See following screen shot.
- There is a JIP config file that you can use similar to the pip config ini file but I have yet to find any exhaustive documentation on it's setup.
Note in the above screen shot the first entry in the External libraries entries. By default, pip places installed packages in that directory so to enable eclipse to find them, you need to also ensure that location is entered.
In Conclusion
- I have more to add to this answer and I will do so as soon as possible. In the meantime, see this example project I've loaded into github.
https://github.com/jheidlage1222/jython_java_integration_example
It shows basic config and how to interface with JARs from python code. I used the apache httpcomponents library as an example. Good luck amigo.
When I go get a package (say, godoc), it wants to create and install it in /usr/lib/go/bin (this is an Ubuntu system using the stock Go packages).
This isn't cool, because like a good Debian user I only let .deb packages install stuff into /usr.
How do I convince it to install into either my GOPATH workspace, or somewhere under /usr/local?
The correct answer turned out to be installing the golang-go.tools package.
If you install Go with GVM instead of from apt they will be placed in ~/.gvm/gos/ or your $GOPATH instead.
https://github.com/moovweb/gvm
Also I don't think godoc comes with 1.3 anymore, it has to be installed from go.tools
http://godoc.org/code.google.com/p/go.tools/cmd/godoc
http://golang.org/doc/go1.2#go_doc
The "go doc" command is deleted.