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|
package main
import (
"fmt"
"io/fs"
"os"
"path/filepath"
"strconv"
"strings"
"text/template"
"github.com/spf13/cobra"
)
var mainTmpl string = `package main
import (
"context"
"mvinkio.online/aoc/{{ .Year }}/{{ .Day }}/{{ .Name }}"
"mvinkio.online/aoc/aoc"
)
// Boilerplate
func main() {
aoc.RunDay(
context.TODO(),
aoc.NewScanCloser("{{ .Year }}/{{ .Day }}/input.txt"),
aoc.ReadLines({{ .Name }}.Reader),
{{ .Name }}.Solvers,
)
}
`
var packageTmpl string = `package {{ .Name }}
import (
"context"
)
var (
Reader = read{{ .Name | Title }}
Solvers = []func(ctx context.Context, data any) (any, error){
partOne, partTwo,
}
)
func partOne(ctx context.Context, data any) (any, error) {
return nil, nil
}
func partTwo(ctx context.Context, data any) (any, error) {
return nil, nil
}
func read{{ .Name | Title }}(lines []string) (any, error) {
return nil, nil
}
`
var testTmpl string = `package {{ .Name }}
import (
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
)
var _ = Describe("{{ .Name }}", func() {
Describe("Part One", func() {
It("should solve the example to the answer", func() {
Expect(true).To(Equal(true))
})
})
Describe("Part Two", func() {
It("should solve the example to the answer", func() {
Expect(true).To(Equal(true))
})
})
})
`
type templateData struct {
Year string
Day string
Name string
}
var genCmd = &cobra.Command{
Use: "gen",
Short: "Generate a new boilerplate entrypoint for a day of Advent of Code",
RunE: func(cmd *cobra.Command, args []string) error {
year, day, packageName := "", "", ""
if len(args) == 2 {
parts := strings.SplitN(args[0], "/", 2)
if len(parts) == 2 {
year = parts[0]
day = parts[1]
}
} else {
return fmt.Errorf("Expected two argument in format %q %q", "<year>/<day>", "<packageName>")
}
packageName = fmt.Sprintf("%s", args[1])
if year == "" || day == "" {
return fmt.Errorf("Expected one argument in format %q", "<year>/<day>")
}
_, err := strconv.Atoi(year)
if err != nil {
return fmt.Errorf("Couldn't parse year integer: %q", year)
}
dayInt, err := strconv.Atoi(day)
if err != nil {
return fmt.Errorf("Couldn't parse day integer: %q", day)
}
if dayInt < 1 || dayInt > 25 {
return fmt.Errorf("Day must be between 1 and 25, got %d", dayInt)
}
dayStr := fmt.Sprintf("%02d", dayInt)
data := templateData{
Year: year,
Day: dayStr,
Name: packageName,
}
tmplMain, err := template.New("main").Funcs(template.FuncMap{
"Title": strings.Title,
}).Parse(mainTmpl)
if err != nil {
return fmt.Errorf("Couldn't parse main template: %w", err)
}
tmplPackage, err := template.New("package").Funcs(template.FuncMap{
"Title": strings.Title,
}).Parse(packageTmpl)
if err != nil {
return fmt.Errorf("Couldn't parse package template: %w", err)
}
tmplTest, err := template.New("test").Funcs(template.FuncMap{
"Title": strings.Title,
}).Parse(testTmpl)
if err != nil {
return fmt.Errorf("Couldn't parse test template: %w", err)
}
if err := ensureDirs(filepath.Join(year, dayStr, packageName)); err != nil {
return fmt.Errorf("Couldn't create directory %s/%s: %v", year, dayStr, err)
}
fMain, err := getFile(filepath.Join(year, dayStr, "main.go"))
if err != nil {
return fmt.Errorf("Couldn't open file %s/%s/main.go: %v", year, dayStr, err)
}
defer fMain.Close()
if err := tmplMain.Execute(fMain, data); err != nil {
return fmt.Errorf("Couldn't execute main template: %w", err)
}
fPackage, err := getFile(filepath.Join(year, dayStr, packageName, data.Name+".go"))
if err != nil {
return fmt.Errorf("Couldn't open file %s/%s/%s/%s.go: %v", year, dayStr, packageName, data.Name, err)
}
defer fPackage.Close()
if err := tmplPackage.Execute(fPackage, data); err != nil {
return fmt.Errorf("Couldn't execute package template: %w", err)
}
fTest, err := getFile(filepath.Join(year, dayStr, packageName, data.Name+"_test.go"))
if err != nil {
return fmt.Errorf("Couldn't open file %s/%s/%s/%s_test.go: %v", year, dayStr, packageName, data.Name, err)
}
defer fPackage.Close()
if err := tmplTest.Execute(fTest, data); err != nil {
return fmt.Errorf("Couldn't execute test template: %w", err)
}
return nil
},
}
func ensureDirs(relativePath string) error {
_, err := os.Stat(relativePath)
if os.IsNotExist(err) {
return os.MkdirAll(relativePath, fs.ModePerm)
}
return nil
}
func getFile(relativePath string) (*os.File, error) {
return os.Create(relativePath)
}
|
