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|
// Debby is a command line tool that links your dolt database to visidata
package main
import (
"bufio"
"fmt"
"os"
"os/exec"
"strings"
)
func main() {
var choice string = "version"
var table string
var query string
var args []string
var noninteractive bool
var err error
if len(os.Args) > 1 {
noninteractive = true
choice = os.Args[1]
switch choice {
case "edit": // Import table
table = os.Args[2]
case "run": // Run query
query = strings.Join(os.Args[2:], " ")
case "help": // Print help
str := `debby is a command line tool that links your dolt database to visidata
Usage:
debby [command] [arguments]
The commands are:
edit Import table
run Run query
help Print help
Runnning debby without any arguments will start debby in interactive mode.
Running debby with any other arguments will run it as a dolt command.`
fmt.Println(str)
return
default: // Run dolt command
choice = ""
args = os.Args[1:]
}
}
// Menu loop. 1. Run query 2. Edit a table 3. Execute Dolt command 4. Exit
for {
tables := ReadTableNames()
// Execute choice
switch choice {
case "run":
// Table name will be empty. Run query
err = RunSQL(query, "")
if err != nil {
fmt.Println(err)
}
case "edit":
// Run query
err = RunSQL("select * from "+table+";", table)
if err != nil {
fmt.Println(err)
}
case "":
// Execute command
ExecuteDoltCommand(args...)
case "exit", "quit":
// Exit
return
}
// If noninteractive, exit
if noninteractive {
return
}
// List tables sequentially
fmt.Println()
fmt.Println("Tables: ", strings.Join(tables, ", "))
fmt.Println()
fmt.Println("[run] a query, [edit] a table, run any dolt command, or [exit]")
fmt.Print("> ")
// Read user input
choicestr := Readline()
choices := strings.Split(choicestr, " ")
choice = choices[0]
switch choice {
case "run", "edit", "exit", "quit":
query = strings.Join(choices[1:], " ")
if len(choices) > 1 {
table = choices[1]
}
default:
choice = ""
}
args = choices
}
}
func Readline() string {
// Read a line from stdin
reader := bufio.NewReader(os.Stdin)
text, _ := reader.ReadString('\n')
return text[:len(text)-1]
}
func ExecuteDoltCommand(args ...string) {
cmd := exec.Command("dolt", args...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
cmd.Stdin = os.Stdin
cmd.Run()
}
func SaveToTable(table, file string) error {
// Run dolt table import -r table file
cmd := exec.Command("dolt", "table", "import", "-r", table, file)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
cmd.Stdin = os.Stdin
return cmd.Run()
}
func ReadTableNames() []string {
// Run dolt ls, ignore the first line and strip spaces for each following line
cmd := exec.Command("dolt", "ls")
cmd.Stderr = os.Stderr
out, err := cmd.Output()
if err != nil {
return []string{}
}
lines := strings.Split(string(out), "\n")
tables := []string{}
for i, line := range lines {
line = strings.TrimSpace(line)
if i == 0 || line == "" {
continue
}
tables = append(tables, line)
}
return tables
}
func RunSQL(query, table string) error {
// Create a temporary file to open in visidata
f, err := os.CreateTemp("", "debby-*.csv")
if err != nil {
return err
}
defer os.Remove(f.Name())
// Run the query and write the output to the file
cmd := exec.Command("dolt", "sql", "-q", query, "-r", "csv")
cmd.Stdout = f
err = cmd.Run()
if err != nil {
return err
}
// Open the file in visidata
err = OpenVisidata(f.Name(), "-f", "csv")
if err != nil {
return err
}
// If table is not empty, save the file to the table
if table != "" {
fmt.Println("Saving to table...")
err = SaveToTable(table, f.Name())
if err != nil {
return err
}
}
// Read the file back into memory
return nil
}
func OpenVisidata(args ...string) error {
cmd := exec.Command("visidata", args...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
cmd.Stdin = os.Stdin
return cmd.Run()
}
|
