I'm trying to build my Electron app with Electron-packager. The problem is my Electron app using node-notifier module. When the packaging, I'm using this command:
electron-packager . MahApp --ignore='node_modules|.sass-cache|src' --platform=darwin --arch=x64
but the problem is that command ignores all node modules. So I edited like this:
electron-packager . MahApp --ignore='node_modules\/(?!node-notifier).+|.sass-cache|src' --platform=darwin --arch=x64
It seems working because only 'node_modules/node-notifier' is inside of resources/app. But it won't work because node-notifier module itself has extra node modules under the node_modules directory like this:
./MahApp/node_modules/node-notifier/node_modules/...
So it didn't work because any dependencies are not exists. My regex in --ignore_path also ignored inside of node_modules in node_notifier. I don't know what should I do now. I tried to specify the relative path like this:
--ignore='./node_modules\/(?!node-notifier).+|...'
but it wasn't work.
Do you actually need the node-notifier module? If not, you can npm uninstall node-notifier --save, or alternatively, put it only in dev-dependencies and run it with --prune option
I am trying to install a homegrown package that will be used , but python package installation is still a bit of a quagmire for me, and I haven't gotten this to work.
I created a package using setup.py sdist, which I uploaded to a repository
I am trying to install my package on another machine. I tried three methods, each time on an entirely clean machine. But none are doing what I want them to.
Method 1
easy_install http://mysite/mypkg.zip
RESULT: mypkg.egg gets added to \Python27\Lib\site-packages. But none of my folder structure is there
Method 2
pip install http://mysite/mypkg.zip
RESULT: two folders, mypkg and mypkg-1.0-py2.7.egg-info, get added to Python27\Lib\site-packages. All of the files seem to be there. But when I got to import or run nosetests on the folder, I get all sorts of import errors that reference mypkg modules. I have played with PATH and PYTHONPATH to get all variations of including the folder, but nothing has worked.
Method 3
download .zip
extract locally
add folder to PATH
run easy_install . in the local dir
RESULT: unpacks pkg locally. When I run nosetests on this folder, everything runs as expected.
Thing is, I don't want each user to have to do all of the steps in Method 3. I will eventually be running nosetests in a .bat file that does various things with the output. I don't want every user to have to modify the .bat file to indicate where the testsuite is located. Which is why Python27\Lib\site-packages appealed to me.
Any insight as to why these three methods behave so differently would be very helpful!
How can I build a Go project from source, instead of using go get domain.com/dir/project? For example, instead of
go get github.com/kr/godep
I want to build from the source:
git clone https://github.com/kr/godep.git
cd godep
GOPATH=/tmp/godep go build
The commands above will result in
dep.go:4:2: cannot find package "code.google.com/p/go.tools/go/vcs" in any of:
/usr/local/Cellar/go/1.2/libexec/src/pkg/code.google.com/p/go.tools/go/vcs (from $GOROOT)
/Users/hanxue/Source/godep/godep/src/code.google.com/p/go.tools/go/vcs (from $GOPATH)
save.go:5:2: cannot find package "github.com/kr/fs" in any of:
/usr/local/Cellar/go/1.2/libexec/src/pkg/github.com/kr/fs (from $GOROOT)
/Users/hanxue/Source/godep/godep/src/github.com/kr/fs (from $GOPATH)
Note: go 1.2 is installed in /usr/local/Cellar/go/1.2 with a link from /usr/local/Cellar/go/1.2/bin/go to /usr/local/bin/go
You need the GOPATH configured correctly. Sometimes a project doesn't have to be checked out in the "sub path" it expects, but often it does and certainly things that depend on it will expect to find it there. So instead of "go get" you can
mkdir -p /tmp/go/src
export GOPATH=/tmp/go
cd $GOPATH/src
mkdir -p github.com/kr/godep
cd github.com/kr/godep/..
git clone http://github.com/kr/godep.git
cd godep
go build
... now rinse and repeat for each dependency!
cd $GOPATH/src
mkdir -p code.google.com/p/
cd code.google.com/p
hg clone https://code.google.com/p/go.tools/
Yes, the vcs dependency was in "go.tools" and needed to be cloned with hg instead. It took a bit of web browsing to figure out. Okay, I think you can see why that's annoying to do by hand.
I'll leave the rest of the dependencies as an exercise for the reader, or you can just use "go get". :-)
A bonus tip that might be what you are really looking for: After checking out the first project, you can use "go get" in that directory to download the dependencies of the project. Sometimes if you have something that's not "go get'able" that's useful if the dependencies are.
I have been trying to follow this particular guide on setting up a workon function where I am able to quickly switch from project to project within a virtualenv...
https://python-guide.readthedocs.org/en/latest/dev/virtualenvs/
I'm trying to re-organize my virtualenv into one particular folder ( I don't know if this is a smart or dumb idea...):
Structure:
-master_folder/ #I'm currently in this folder
-virtual_enviornments/
-project1/
-project2/
-projects/
-project1/
-project2/
It so happens that I am stuck at the third step:
$ pip install virtualenvwrapper
$ export WORKON_HOME=~/Envs
$ source /usr/local/bin/virtualenvwrapper.sh #STUCK HERE
ERROR: -bash: /usr/local/bin/virtualenvwrapper.sh: No such file or directory
I know the file does not exist within the directory, so am I supposed to create it some other way? I'm really confused... #.#
After running which virtualenv:
/Library/Frameworks/Python.framework/Versions/2.7/bin/virtualenv
Did I install my virtualenv incorrectly?
I did just do pip install virtualenv....
Thanks for all the help guys!
I dont't think you have installed virtual environment correctly.
Please go through this link
http://ayarshabeer.com/post/50973941605/install-multiple-django-version-using-virtualenvwrapper
Even though I have GOPATH properly set, I still can't get "go build" or "go run" to find my own packages. What am I doing wrong?
$ echo $GOROOT
/usr/local/go
$ echo $GOPATH
/home/mitchell/go
$ cat ~/main.go
package main
import "foobar"
func main() { }
$ cat /home/mitchell/go/src/foobar.go
package foobar
$ go build main.go
main.go:3:8: import "foobar": cannot find package
It does not work because your foobar.go source file is not in a directory called foobar. go build and go install try to match directories, not source files.
Set $GOPATH to a valid directory, e.g. export GOPATH="$HOME/go"
Move foobar.go to $GOPATH/src/foobar/foobar.go and building should work just fine.
Additional recommended steps:
Add $GOPATH/bin to your $PATH by: PATH="$GOPATH/bin:$PATH"
Move main.go to a subfolder of $GOPATH/src, e.g. $GOPATH/src/test
go install test should now create an executable in $GOPATH/bin that can be called by typing test into your terminal.
Although the accepted answer is still correct about needing to match directories with package names, you really need to migrate to using Go modules instead of using GOPATH. New users who encounter this problem may be confused about the mentions of using GOPATH (as was I), which are now outdated. So, I will try to clear up this issue and provide guidance associated with preventing this issue when using Go modules.
If you're already familiar with Go modules and are experiencing this issue, skip down to my more specific sections below that cover some of the Go conventions that are easy to overlook or forget.
This guide teaches about Go modules: https://golang.org/doc/code.html
Project organization with Go modules
Once you migrate to Go modules, as mentioned in that article, organize the project code as described:
A repository contains one or more modules. A module is a collection of
related Go packages that are released together. A Go repository
typically contains only one module, located at the root of the
repository. A file named go.mod there declares the module path: the
import path prefix for all packages within the module. The module
contains the packages in the directory containing its go.mod file as
well as subdirectories of that directory, up to the next subdirectory
containing another go.mod file (if any).
Each module's path not only serves as an import path prefix for its
packages, but also indicates where the go command should look to
download it. For example, in order to download the module
golang.org/x/tools, the go command would consult the repository
indicated by https://golang.org/x/tools (described more here).
An import path is a string used to import a package. A package's
import path is its module path joined with its subdirectory within the
module. For example, the module github.com/google/go-cmp contains a
package in the directory cmp/. That package's import path is
github.com/google/go-cmp/cmp. Packages in the standard library do not
have a module path prefix.
You can initialize your module like this:
$ go mod init github.com/mitchell/foo-app
Your code doesn't need to be located on github.com for it to build. However, it's a best practice to structure your modules as if they will eventually be published.
Understanding what happens when trying to get a package
There's a great article here that talks about what happens when you try to get a package or module: https://medium.com/rungo/anatomy-of-modules-in-go-c8274d215c16
It discusses where the package is stored and will help you understand why you might be getting this error if you're already using Go modules.
Ensure the imported function has been exported
Note that if you're having trouble accessing a function from another file, you need to ensure that you've exported your function. As described in the first link I provided, a function must begin with an upper-case letter to be exported and made available for importing into other packages.
Names of directories
Another critical detail (as was mentioned in the accepted answer) is that names of directories are what define the names of your packages. (Your package names need to match their directory names.) You can see examples of this here: https://medium.com/rungo/everything-you-need-to-know-about-packages-in-go-b8bac62b74cc
With that said, the file containing your main method (i.e., the entry point of your application) is sort of exempt from this requirement.
As an example, I had problems with my imports when using a structure like this:
/my-app
├── go.mod
├── /src
├── main.go
└── /utils
└── utils.go
I was unable to import the code in utils into my main package.
However, once I put main.go into its own subdirectory, as shown below, my imports worked just fine:
/my-app
├── go.mod
├── /src
├── /app
| └── main.go
└── /utils
└── utils.go
In that example, my go.mod file looks like this:
module git.mydomain.com/path/to/repo/my-app
go 1.14
When I saved main.go after adding a reference to utils.MyFunction(), my IDE automatically pulled in the reference to my package like this:
import "git.mydomain.com/path/to/repo/my-app/src/my-app"
(I'm using VS Code with the Golang extension.)
Notice that the import path included the subdirectory to the package.
Dealing with a private repo
If the code is part of a private repo, you need to run a git command to enable access. Otherwise, you can encounter other errors This article mentions how to do that for private Github, BitBucket, and GitLab repos: https://medium.com/cloud-native-the-gathering/go-modules-with-private-git-repositories-dfe795068db4
This issue is also discussed here: What's the proper way to "go get" a private repository?
I solved this problem by set my go env GO111MODULE to off
go env -w GO111MODULE=off
Note: setting GO111MODULE=off will turn off the latest GO Modules feature.
Reference: Why is GO111MODULE everywhere, and everything about Go Modules (updated with Go 1.17)
GO111MODULE with Go 1.16
As of Go 1.16, the default behavior is GO111MODULE=on, meaning that if
you want to keep using the old GOPATH way, you will have to force Go
not to use the Go Modules feature:
export GO111MODULE=off
In the recent go versions from 1.14 onwards, we have to do go mod vendor before building or running, since by default go appends -mod=vendor to the go commands.
So after doing go mod vendor, if we try to build, we won't face this issue.
Edit: since you meant GOPATH, see fasmat's answer (upvoted)
As mentioned in "How do I make go find my package?", you need to put a package xxx in a directory xxx.
See the Go language spec:
package math
A set of files sharing the same PackageName form the implementation of a package.
An implementation may require that all source files for a package inhabit the same directory.
The Code organization mentions:
When building a program that imports the package "widget" the go command looks for src/pkg/widget inside the Go root, and then—if the package source isn't found there—it searches for src/widget inside each workspace in order.
(a "workspace" is a path entry in your GOPATH: that variable can reference multiple paths for your 'src, bin, pkg' to be)
(Original answer)
You also should set GOPATH to ~/go, not GOROOT, as illustrated in "How to Write Go Code".
The Go path is used to resolve import statements. It is implemented by and documented in the go/build package.
The GOPATH environment variable lists places to look for Go code.
On Unix, the value is a colon-separated string.
On Windows, the value is a semicolon-separated string.
On Plan 9, the value is a list.
That is different from GOROOT:
The Go binary distributions assume they will be installed in /usr/local/go (or c:\Go under Windows), but it is possible to install them in a different location.
If you do this, you will need to set the GOROOT environment variable to that directory when using the Go tools.
TL;DR: Follow Go conventions! (lesson learned the hard way), check for old go versions and remove them. Install latest.
For me the solution was different. I worked on a shared Linux server and after verifying my GOPATH and other environment variables several times it still didn't work. I encountered several errors including 'Cannot find package' and 'unrecognized import path'. After trying to reinstall with this solution by the instructions on golang.org (including the uninstall part) still encountered problems.
Took me some time to realize that there's still an old version that hasn't been uninstalled (running go version then which go again... DAHH) which got me to this question and finally solved.
Running go env -w GO111MODULE=auto worked for me
Without editing GOPATH or anything, in my case just worked the following:
/app
├── main.go
├── /utils
└── utils.go
Import packages where needed. This can be unintuitive, because it isn't relative to the app path. You need to add the app in the package path too:
main.go:
package main
import(
"app/util"
)
Being in app directory, run:
go mod init app
go get <package/xxx>
go build main.go / go run main.go
You should be good to go.
GOPATH = /home/go
appPath = /home/projects/app
Create a proper go.mod and go.sum with go mod init app (delete old before)
After that resolve all dependencies like missing packages with go get github.com/example/package.
In simple words you can solve the import problem even with GO111MODULE=on with the following syntax for import:
import <your_module_name>/<package_name>
your_module_name -> module name which can be found in the go.mod file of the module as the first line.
example: github.com/nikhilg-hub/todo/ToDoBackend
package_name -> Path to your package within module.
example: orm
So the import statement would look like:
import "github.com/nikhilg-hub/todo/ToDoBackend/orm"
According to me we need to specify the module name + package name because we may need a same package name in two or more different modules.
Note: If you are importing a package from same module still you need to specify the full import path like above.
If you have a valid $GOROOT and $GOPATH but are developing outside of them, you might get this error if the package (yours or someone else's) hasn't been downloaded.
If that's the case, try go get -d (-d flag prevents installation) to ensure the package is downloaded before you run, build or install.
GOROOT should be set to your installation directory (/usr/local/go).
GOPATH should be set to your working directory (something like /home/username/project_folder).
GOPATH should not be set to GOROOT as your own project may need to install packages, and it's not recommended to have those packages in the Go installation folder. Check out this link for more.
For me none of the above solutions worked. But my go version was not the latest one. I have downloaded the latest version and replaced the older version in my mac os after that it worked perfectly.
I had a similar problem when building a docker file:
[1/3] STEP 9/9: RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -o manager main.go
api/v1alpha1/XXX.go:5:2: cannot find package "." in:
/workspace/client/YYY/YYY.go
This only appeared when building the Dockerfile, building locally worked fine.
The problem turned out to be a missing statement in my Dockerfile:
COPY client/ client/
I do not understand why this happens, we must be able to import from wherever our file is in its nest, since I have discovered that if we have more than one nest this will throw an error.
package main
import (
"fmt"
"indexer/source/testPackage3" // this will be show a GOROOT error.
"indexer/testPackage"
"indexer/testPackage2"
)
func main() {
fmt.Println("Agile content indexer -")
fmt.Println(testPackage.Greeting())
fmt.Println(testPackage2.Greeting())
fmt.Println(testPackage3.Greeting())
}
├── testPackage2
│ ├── entry2.go
│ └── source
│ └── entry3.go
To conclude, I just want to tell you, the entry3.go file will not work when imported into my main file, which in this case is (main.go), I do not understand why, therefore, I have simply chosen to use a depth folder in the packages I need to export.
entry.go, entry2.go will work perfectly when imported, but entry3.go will not work..
In addition, both the directory and the name of the package must be the same so that they work properly when importing them.
Have you tried adding the absolute directory of go to your 'path'?
export PATH=$PATH:/directory/to/go/