Just a personal collection of golang libraries, algorithms, etc. A basic playground for testing (hopefully) useful code...
git@github.com:mwiater/golang-library.git
- Scaffolding/CLI
- Logging
- SysInfo
- Data Structures and Algorithms
- Http
- Websockets
- Files
REF: https://ordina-jworks.github.io/development/2018/10/20/make-your-own-cli-with-golang-and-cobra.html
go get github.com/spf13/cobra/cobra
Issue: spf13/cobra#1215
go get github.com/spf13/cobra/cobra
go: extracting github.com/spf13/cobra v1.0.0
go: finding github.com/spf13/cobra/cobra latest
go: extracting github.com/spf13/cobra/cobra v0.0.0-20200916152758-7f8e83d9366a
go get github.com/spf13/cobra/cobra: ambiguous import: found github.com/spf13/cobra/cobra in multiple modules:
github.com/spf13/cobra v1.0.0 (/home/matt/go/pkg/mod/github.com/spf13/cobra@v1.0.0/cobra)
github.com/spf13/cobra/cobra v0.0.0-20200916152758-7f8e83d9366a (/home/matt/go/pkg/mod/github.com/spf13/cobra/cobra@v0.0.0-20200916152758-7f8e83d9366a)
go get -u github.com/spf13/cobra/cobra@v1.0.0
by default, this should store the app in: ~/go, e.g.: /home/matt/go/bin/cobra
Set the go path, assuming above:
export GOPATH="/home/matt/go"
export PATH=$PATH:$(go env GOPATH)/bin
Permanent:
nano ~/.bashrc
Add:
export GOPATH="/home/matt/go"
export PATH=$PATH:$(go env GOPATH)/bin
Initialize:
source ~/.bashrc
Init:
Assuming in base of repo, e.g.: /home/matt/projects/golang-library/
mkdir -p github.com/mwiater/golang-library
cd github.com/mwiater/golang-library
cobra init --pkg-name=github.com/mwiater/golang-library
#=>
Your Cobra applicaton is ready at
/home/matt/projects/golang-library/github.com/mwiater/golang-library
ls -laF #=>
...
drwxr-x--x 2 matt matt 4096 May 28 18:15 cmd/
-rw-rw-r-- 1 matt matt 11358 May 28 18:15 LICENSE
-rw-rw-r-- 1 matt matt 672 May 28 18:15 main.go
Init mod: spf13/cobra#910 (comment)
go mod init github.com/mwiater/golang-library
This creates the necessary go.mod file needed in the repo, but not in the cobra docs for some reason.
git add -A
git commit -m "initial commit"
git push origin master
Test: go run main.go #=>
go: finding github.com/spf13/viper v1.7.0
go: downloading github.com/spf13/viper v1.7.0
go: extracting github.com/spf13/viper v1.7.0
go: downloading gopkg.in/yaml.v2 v2.2.4
go: downloading github.com/subosito/gotenv v1.2.0
go: downloading gopkg.in/ini.v1 v1.51.0
go: downloading github.com/magiconair/properties v1.8.1
go: downloading golang.org/x/text v0.3.2
go: downloading golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0
go: extracting github.com/subosito/gotenv v1.2.0
go: extracting github.com/magiconair/properties v1.8.1
go: extracting gopkg.in/yaml.v2 v2.2.4
go: extracting gopkg.in/ini.v1 v1.51.0
go: extracting golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0
go: extracting golang.org/x/text v0.3.2
go: finding golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0
go: finding github.com/magiconair/properties v1.8.1
go: finding golang.org/x/text v0.3.2
go: finding github.com/subosito/gotenv v1.2.0
go: finding gopkg.in/ini.v1 v1.51.0
go: finding gopkg.in/yaml.v2 v2.2.4
A longer description that spans multiple lines and likely contains
examples and usage of using your application. For example:
Cobra is a CLI library for Go that empowers applications.
This application is a tool to generate the needed files
to quickly create a Cobra application.
Modify the root.go file to print a message for testing:
Find:
// Uncomment the following line if your bare application
// has an action associated with it:
//Run: func(cmd *cobra.Command, args []string) { },
Replace:
// Uncomment the following line if your bare application
// has an action associated with it:
Run: func(cmd *cobra.Command, args []string) {fmt.Println("Hello CLI")},
Install app as CLI executable (Use full app path):
go install github.com/mwiater/golang-library
Should install here by default: ~/go/bin/golang-library.
Since GOPATH has been added to PATH (at the beginning of this doc), the CLI command should now be available:
golang-library #=>
Hello CLI
NOTE: go install github.com/mwiater/golang-library must be run when updating cmd files...
cobra add bubblesort
Rebuild: go install github.com/mwiater/golang-library
Run: golang-library bubblesort
cobra add pi
go install github.com/mwiater/golang-library
golang-library pi
cobra add json
go install github.com/mwiater/golang-library
golang-library json
golang-library help #=>
A longer description that spans multiple lines and likely contains
examples and usage of using your application. For example:
Cobra is a CLI library for Go that empowers applications.
This application is a tool to generate the needed files
to quickly create a Cobra application.
Usage:
golang-library [flags]
golang-library [command]
Available Commands:
bubblesort A bubblesort example.
help Help about any command
pi Calculate n-digits of Pi
sysinfo Get information about your host.
Flags:
--config string config file (default is $HOME/.golang-library.yaml)
-h, --help help for golang-library
-t, --toggle Help message for toggle
Parallel: Monte Carlo (REF: https://www.soroushjp.com/2015/02/07/go-concurrency-is-not-parallelism-real-world-lessons-with-monte-carlo-simulations/amp/)
Logging (REF: https://github.com/sirupsen/logrus)
cobra add logger
Rebuild: go install github.com/mwiater/golang-library
Run: golang-library logger