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starter.go
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starter.go
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package main
import (
"flag"
"fmt"
"log"
"os"
"path/filepath"
)
var (
day = flag.Uint("day", 1, "day {1,...,25}")
part = flag.String("part", "a", "part {a,b}")
lang = flag.String("lang", "cpp", "language {cpp,go,R,py,sh}")
)
type Language string
const (
Cpp Language = `#include <iostream>
int main(const int, const char** argv) {
std::cout << TODO << '\n';
}
`
Python Language = `import sys
with open(sys.argv[1]) as f:
TODO = [line.strip() for line in f]
print()
`
Go Language = `package main
import (
"fmt"
)
func main() {
fmt.Println(TODO)
}
`
R Language = `args <- commandArgs(trailingOnly = TRUE)
TODO <- readLines(args[1])
cat(TODO, "\n", sep = "")
`
Shell Language = `#!/usr/bin/env bash
echo $TODO
`
)
func languageFromExtension(extension string) (Language, error) {
switch extension {
case "cpp":
return Cpp, nil
case "go":
return Go, nil
case "R":
return R, nil
case "py":
return Python, nil
case "sh":
return Shell, nil
}
return "", fmt.Errorf("unsupported language %s", extension)
}
func write(name, contents string) {
dir, _ := filepath.Split(name)
err := os.MkdirAll(dir, os.ModePerm)
if err != nil {
log.Fatal(err)
}
file, createErr := os.Create(name)
if createErr != nil {
log.Fatal(createErr)
}
defer file.Close()
_, writeErr := file.WriteString(contents)
if writeErr != nil {
log.Fatal(writeErr)
}
}
func main() {
flag.Parse()
if *part != "a" && *part != "b" {
log.Fatal("part must be either a or b")
}
if *day < 1 || *day > 25 {
log.Fatal("day must be between 1 and 25")
}
filename := fmt.Sprintf("main.%s", *lang)
formattedDay := fmt.Sprintf("%02d", *day)
path := filepath.Join(formattedDay, *part, filename)
language, err := languageFromExtension(*lang)
if err != nil {
log.Fatal(err)
}
write(path, string(language))
}