LatexAutoInstaller/Main.go
2021-08-26 16:32:51 +02:00

167 lines
3.4 KiB
Go

package main
import (
"bufio"
"fmt"
"io"
"log"
"os/exec"
"regexp"
"runtime"
"strconv"
)
func main() {
fmt.Printf("Pdflatex command exists: %t\n", commandExists("pdflatex"))
fmt.Printf("%s/%s\n", runtime.GOOS, runtime.GOARCH)
compileAndInstall()
}
func compileAndInstall() {
out, err := compileLatex("main.tex")
//fmt.Println(*out)
if err != nil {
fmt.Println("An error occured while compiling the document!")
filename := parseMissingFile(out)
if filename != "" {
fmt.Printf("We need to download: %s\n", filename)
// now we neet to perform a root check
if rootCheck() {
log.Println("Awesome! You are now running this program with root permissions!")
if installFile(filename) {
// if successfully installed we try to compile again
compileAndInstall()
}
} else {
log.Fatal("This program must be run as root! (sudo)")
}
} else {
fmt.Println(*out)
fmt.Println("another build error occured!")
}
} else {
fmt.Println("document built successfully!")
}
}
func parseMissingFile(output *string) string {
matchfile := regexp.MustCompile("! LaTeX Error: File `([^`']*)' not found|! I can't find file `([^`']*)'.")
matches := matchfile.FindStringSubmatch(*output)
fmt.Printf("%#v\n", matches)
if matches != nil {
if matches[1] != "" {
return matches[1]
} else {
return matches[2]
}
}
// ok now we try to find a font error
fontregex := regexp.MustCompile(`! Font \\[^=]*=([^\s]*)\s`)
fontmatch := fontregex.FindStringSubmatch(*output)
fmt.Printf("%#v\n", fontmatch)
if fontmatch != nil {
if fontmatch[1] != "" {
return fontmatch[1]
}
}
// now try babel errors
babelregex := regexp.MustCompile("Unknown option `([^`']*)'. Either you misspelled")
babelmatch := babelregex.FindStringSubmatch(*output)
if babelmatch != nil {
if babelmatch[1] != "" {
return babelmatch[1] + ".ldf"
}
}
return ""
}
// check if a specific system command is available
func commandExists(cmd string) bool {
_, err := exec.LookPath(cmd)
return err == nil
}
// parse the thumbail picture from video file
func compileLatex(filename string) (*string, error) {
app := "pdflatex"
cmd := exec.Command(app,
"-file-line-error",
"-interaction=nonstopmode",
"-synctex=1",
"-output-format=pdf",
filename)
stdout, err := cmd.Output()
output := string(stdout)
return &output, err
}
func rootCheck() bool {
cmd := exec.Command("id", "-u")
output, err := cmd.Output()
if err != nil {
log.Fatal(err)
}
// output has trailing \n
// need to remove the \n
// otherwise it will cause error for strconv.Atoi
// log.Println(output[:len(output)-1])
// 0 = root, 501 = non-root user
i, err := strconv.Atoi(string(output[:len(output)-1]))
if err != nil {
log.Fatal(err)
}
if i == 0 {
return true
} else {
return false
}
}
func installFile(filename string) bool {
if !commandExists("dnf") {
fmt.Println("dnf not existing!")
return false
}
cmd := exec.Command("dnf", "-y", "install", fmt.Sprintf("tex(%s)", filename))
fmt.Println(cmd.String())
stdout, _ := cmd.StdoutPipe()
stderr, _ := cmd.StderrPipe()
fmt.Println("running dnf install now!")
go func() {
merged := io.MultiReader(stderr, stdout)
scanner := bufio.NewScanner(merged)
for scanner.Scan() {
m := scanner.Text()
fmt.Println(m)
}
}()
err := cmd.Run()
if err != nil {
fmt.Println(err.Error())
return false
}
return true
}