Dan Anglin
21d7b3c447
Changes: - Build the cv-builder tool using go build instead of mage -compile in the first stage. - The final docker image is now based on Alpine. - Create a copy function to copy the final CV from the temporary directory to the final destination. - Replace os.Rename with the custom copy function to support copying files between different filesystems.
138 lines
3 KiB
Go
138 lines
3 KiB
Go
package main
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import (
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"embed"
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"encoding/json"
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"flag"
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"fmt"
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"log"
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"os"
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"os/exec"
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"path/filepath"
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"text/template"
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"io"
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)
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//go:embed templates/tex/*
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var templates embed.FS
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func main() {
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var input, output string
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flag.StringVar(&input, "input", "", "specify the CV JSON file that you want to input to the builder.")
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flag.StringVar(&output, "output", "", "specify the name of the output CV file.")
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flag.Parse()
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tempDir, err := os.MkdirTemp("/tmp", "cv-builder-")
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if err != nil {
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log.Fatalf("ERROR: Unable to create a temporary directory; %v", err)
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}
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defer func() {
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err := os.RemoveAll(tempDir)
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if err != nil {
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log.Printf("WARN: An error occurred when removing the temporary directory; %v", err)
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}
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}()
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texFile, err := tex(input, tempDir)
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if err != nil {
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log.Fatalf("ERROR: %v", err)
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}
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if err := pdf(tempDir, texFile, output); err != nil {
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log.Fatalf("ERROR: %v", err)
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}
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}
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// tex generates the CV document as a Tex file.
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func tex(input, tempDir string) (string, error) {
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data, err := os.ReadFile(input)
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if err != nil {
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return "", fmt.Errorf("unable to read data from file; %w", err)
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}
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var cv Cv
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if err = json.Unmarshal(data, &cv); err != nil {
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return "", fmt.Errorf("unable to decode JSON data; %w", err)
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}
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// if CV_CONTACT_PHONE is set then add it to the CV
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phone := os.Getenv("CV_CONTACT_PHONE")
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if len(phone) > 0 {
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cv.Contact.Phone = phone
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}
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output := filepath.Join(tempDir, "cv.tex")
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file, err := os.Create(output)
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if err != nil {
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return "", fmt.Errorf("unable to create output file %s; %w", output, err)
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}
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defer file.Close()
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fmap := template.FuncMap{
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"notLastElement": notLastElement,
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"join": join,
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"durationToString": durationToString,
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}
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t := template.Must(template.New("cv.tmpl.tex").
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Funcs(fmap).
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Delims("<<", ">>").
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ParseFS(templates, "templates/tex/*.tmpl.tex"),
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)
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if err = t.Execute(file, cv); err != nil {
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return "", fmt.Errorf("unable to execute the CV template. %w", err)
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}
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log.Printf("INFO: Tex file %s was successfully created.", output)
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return output, nil
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}
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// pdf generates the CV document as a PDF file from the tex file.
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func pdf(tempDir, texFile, output string) error {
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pathArg := "--path=" + tempDir
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command := exec.Command("mtxrun", pathArg, "--script", "context", texFile)
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command.Stderr = os.Stderr
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command.Stdout = os.Stdout
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if err := command.Run(); err != nil {
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return err
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}
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if output == "" {
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output = "./cv.pdf"
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}
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if err := copy(filepath.Join(tempDir, "cv.pdf"), output); err != nil {
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return err
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}
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return nil
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}
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func copy(input, output string) error {
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inputFile, err := os.Open(input)
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if err != nil {
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return fmt.Errorf("unable to open %s; %w", input, err)
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}
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defer inputFile.Close()
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outputFile, err := os.Create(output)
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if err != nil {
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return fmt.Errorf("unable to create %s; %w", output, err)
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}
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defer outputFile.Close()
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_, err = io.Copy(outputFile, inputFile)
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if err != nil {
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return fmt.Errorf("unable to copy %s to %s; %w", input, output, err)
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}
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return nil
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}
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