Panic error when importing a github pachage

Hana_Elhachi · January 8, 2022, 7:58pm

Hello, can anyone help me solve this problem, I got this error when importing a Github package:
panic: project_home_dir env variable was not provided, this is needed for training

NobbZ · January 8, 2022, 9:02pm

Which one?

Hana_Elhachi · January 8, 2022, 9:11pm

This is the whole error:

panic: PROJECT_HOME_DIR Env variable was not provided, this is needed for training

skillian · January 9, 2022, 11:54am

Hana_Elhachi:

goroutine 1 [running]:
[github.com/mutdroco/mpquic_for_video_stream_backend.(*scheduler).setup(0xc000180000)](http://github.com/mutdroco/mpquic_for_video_stream_backend.(*scheduler).setup(0xc000180000))
/home/mininet/go/pkg/mod/[github.com/mutdroco/mpquic_for_video_stream_backend@v0.0.0-20210705113800-59caa7259644/scheduler.go:82 ](http://github.com/mutdroco/mpquic_for_video_stream_backend@v0.0.0-20210705113800-59caa7259644/scheduler.go:82) +0x4d8

Based on the top of the stack trace in the error message you got, I opened GitHub - mutdroco/mpquic_for_video_stream_backend and then opened scheduler.go and went to around line 82, where I saw this:

func (sch *scheduler) setup() {
	sch.projectHomeDir = os.Getenv(constants.PROJECT_HOME_DIR)
	if sch.projectHomeDir == "" {
		panic("`PROJECT_HOME_DIR` Env variable was not provided, this is needed for training")
	}

Though I don’t understand what this pavkage does, ot does seem to need this “PROJECT_HOME_DIR” to be defined.

Hana_Elhachi · January 11, 2022, 12:08pm

Thank you so much for your reply, I’m new to Golang so it is a little bit hard to handle with this code, but I’m learning a lot from your recommendations.

I tried to define the PROJECT_HOME_DIR in the constants package as follow:

PROJECT_HOME_DIR = " #absolute-path-to-my-project"
PROJECT_HOME_DIR = “GOPATH”
I also tried to define it as a command-line argument:
go run project.go " #absolute-path-to-my-project"
go run project.go “GOPATH”

But it still gave me the same error!

There is an interesting note in the readme file said: “Essential Environment Variables: OUTPUT_DIR="ABSOLUTE_PATH_TO_OUTPUT_DIR is needed for scheduler implementation in native application”… but I don’t know how to essential it and where?

mje · January 11, 2022, 3:44pm

Define PROJECT_HOME_DIR environment variable in your shell/OS before running your code, or via os.Setenv from your code before it calls the code that requires PROJECT_HOME_DIR.

Hana_Elhachi · January 11, 2022, 5:53pm

I use this command to set the env var: export PROJECT_HOME_DIR=“absolute/path” but I got other errors:

github.com/mutdroco/mpquic_for_video_stream_backend.(*scheduler).setup(0xc000180000)
/home/mininet/go/pkg/mod/github.com/mutdroco/mpquic_for_video_stream_backend@v0.0.0-20210705113800-59caa7259644/scheduler.go:92 +0x4bc
[github.com/mutdroco/mpquic_for_video_stream_backend.(*session).setup(0xc00000c1e0](http://github.com/mutdroco/mpquic_for_video_stream_backend.(*session).setup(0xc00000c1e0), 0x0, 0x76cf00, 0x8, 0xc000001980, 0x0, 0x0, 0x0, 0x7d16b8, 0xc000060040, …)

I guess that the project is still in development.

mje · January 11, 2022, 6:25pm

Failure to open a file. Not very user-friendly coding. You either need to be able to track down the reasons for these panics from the code referenced in the stack trace or find a different package.

linFileName := sch.projectHomeDir + "/sch_out/lin"
	file, err := os.OpenFile(linFileName, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
	if err != nil {
		panic(err)
	}

Hana_Elhachi · January 12, 2022, 10:10am

I agree with you I have to find another package to work with, thank you so much for your help

system · April 12, 2022, 10:11am

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