Task CLI

package main

import (
	"encoding/json"
	"flag"
	"fmt"
	"os"
	"strings"
)

// Task defines a sample struct
type Task struct {
	ID     int    `json:"id"`
	Name   string `json:"name"`
	Status string `json:"status"`
}

func getTasks() []Task {
	return []Task{
		{ID: 1, Name: "Write spec", Status: "in-progress"},
		{ID: 2, Name: "Review code", Status: "done"},
		{ID: 3, Name: "Deploy", Status: "pending"},
	}
}

func outputText(tasks []Task, quiet bool) {
	if !quiet {
		fmt.Printf("%-5s %-20s %-12s\n", "ID", "Name", "Status")
		fmt.Println(strings.Repeat("-", 40))
	}
	for _, t := range tasks {
		fmt.Printf("%-5d %-20s %-12s\n", t.ID, t.Name, t.Status)
	}
}

func outputJSON(tasks []Task) {
	out, err := json.MarshalIndent(tasks, "", "  ")
	if err != nil {
		fmt.Fprintf(os.Stderr, "JSON serialization error: %v\n", err)
		os.Exit(1)
	}
	fmt.Println(string(out))
}

func printVersion() {
	fmt.Println("taskcli v0.1.0")
}

func main() {
	output := flag.String("output", "text", "Output format: text or json")
	quiet := flag.Bool("quiet", false, "Suppress text output headers")
	version := flag.Bool("version", false, "Show version and exit")
	flag.Parse()

	if *version {
		printVersion()
		os.Exit(0)
	}

	tasks := getTasks()

	switch *output {
	case "json":
		outputJSON(tasks)
	case "text":
		outputText(tasks, *quiet)
	default:
		fmt.Fprintf(os.Stderr, "Unsupported output format: %s\n", *output)
		os.Exit(1)
	}
}

mkdir /root/build/taskcli
cd /root/build/taskcli
vim main.go
go mod init taskcli
go: creating new go.mod: module taskcli
go: to add module requirements and sums:
	go mod tidy
go mod tidy
go build -o taskcli

# make a PowerShell directory for testing
cd /root/
mkdir pwsh

# do this in Ubuntu# 1) cd into your pwsh directory
cd /root/pwsh

# 2) Install prerequisites (Ubuntu 24.04 “Noble” ships libicu74, not libicu72)
apt-get update
apt-get install -y \
  curl \
  libunwind8 \
  libssl3 \
  libicu74 \
  zlib1g \
  libstdc++6 \
  libgcc-s1 \
  libgssapi-krb5-2  #  [oai_citation_attribution:0‡Launchpad](https://launchpad.net/ubuntu/noble/%2Bpackage/libicu74?utm_source=chatgpt.com)

# 3) Download the PowerShell 7.5.0 Linux x64 tarball
curl -sSL -o powershell-7.5.0-linux-x64.tar.gz \
  https://github.com/PowerShell/PowerShell/releases/download/v7.5.0/powershell-7.5.0-linux-x64.tar.gz  #  [oai_citation_attribution:1‡Microsoft Learn](https://learn.microsoft.com/en-us/powershell/scripting/install/install-other-linux?view=powershell-7.5&utm_source=chatgpt.com)

# 4) Extract everything from the versioned subfolder
tar -xvf powershell-7.5.0-linux-x64.tar.gz

# 5) Move its contents up into your current directory
mv powershell-7.5.0-linux-x64/* .
# (move any hidden files too; ignore errors if none)
mv powershell-7.5.0-linux-x64/.* . 2>/dev/null || true

# 6) Remove the now-empty folder and the archive
rm -rf powershell-7.5.0-linux-x64 powershell-7.5.0-linux-x64.tar.gz

# 7) Ensure the pwsh binary is executable
chmod +x pwsh

# 8) Launch PowerShell
./pwsh and get the steps right.

# enter PowerShell
cd /root/pwsh
./pwsh
PowerShell 7.5.0
PS /root/pwsh>

# run taskcli with Linux style syntax.
cd /root/build/taskcli

./taskcli | grep "in-progress"                                                             
1     Write spec           in-progress 

# run taskcli with PowerShell style syntax.
./taskcli --output=json | ConvertFrom-Json | Where-Object { $_.status -ne "done" } | Format-Table

id name       status
-- ----       ------
 1 Write spec in-progress
 3 Deploy     pending
 
 # run taskcli with PowerShell processing text.
./taskcli --output=text | Select-String -NotMatch 'done'           

ID    Name                 Status      
----------------------------------------
1     Write spec           in-progress 
3     Deploy               pending     
 
 

./exitcode 0
Exited with code 0 - Exited Successfully
PS /root/build/exit-code> echo $LASTEXITCODE
0
PS /root/build/exit-code> ./exitcode 1      
Exited with code 1 - General Error
PS /root/build/exit-code> echo $LASTEXITCODE
1