Как пойти найти пакеты онлайн?

Question

Я пытаюсь запустить программу go с помощью LiteIDE x22, но получаю сообщение

C:/Go/bin/go.exe build  [C:/Users/admins/Desktop/desktp/worm_scraper-master]
worm_scraper.go:11:2: cannot find package "github.com/codegangsta/cli" in any of:
    C:\Go\src\pkg\github.com\codegangsta\cli (from $GOROOT)
    C:\users\admins\gostuff\src\github.com\codegangsta\cli (from $GOPATH)
worm_scraper.go:12:2: cannot find package "github.com/puerkitobio/goquery" in any of:
    C:\Go\src\pkg\github.com\puerkitobio\goquery (from $GOROOT)
    C:\users\admins\gostuff\src\github.com\puerkitobio\goquery (from $GOPATH)
Error: process exited with code 1.

Я думаю, это означает, что он ищет его на моем жестком диске, а не в Интернете, верно? (кстати, я довольно не разбираюсь в программировании, просто пытаюсь написать что-то, написанное кем-то другим), как мне получить доступ к сети? вот полный код

package main

import (
    "errors"
    "fmt"
    "os"
    "os/exec"
    "regexp"
    "strings"

    "github.com/codegangsta/cli"
    "github.com/puerkitobio/goquery"
)

const (
    MainSite        = "https://parahumans.wordpress.com/"
    TableOfContents = "https://parahumans.wordpress.com/table-of-contents/"
)

type Arc struct {
    Identifier string
    Title      string
    Chapters   []Chapter
}

type Chapter struct {
    Title      string
    Url        string
    Tags       []string
    Paragraphs []Paragraph
    Retries    int
    DatePosted string
}

type Paragraph string

// Format the paragraph
func (p *Paragraph) Format() {
    s := string(*p)

    // Handle emphasis
    s = strings.Replace(s, "<em>", "*", -1)
    s = strings.Replace(s, "</em>", "*", -1)
    s = strings.Replace(s, "<i>", "*", -1)
    s = strings.Replace(s, "</i>", "*", -1)

    // Handle bold
    s = strings.Replace(s, "<strong>", "**", -1)
    s = strings.Replace(s, "</strong>", "**", -1)
    s = strings.Replace(s, "<b>", "**", -1)
    s = strings.Replace(s, "</b>", "**", -1)

    // Remove new lines
    s = strings.Replace(s, "\n", "", -1)

    // And random double spaces
    s = strings.Replace(s, ".  ", ". ", -1)

    *p = Paragraph(s)
}

// Return the Arc that the given chapter belongs to
func (ch *Chapter) WhichArc(arcList []*Arc) (*Arc, error) {
    for _, arc := range arcList {
        if strings.Replace(ch.Title[:2], ".", "", -1) == arc.Identifier {
            return arc, nil
        }
    }
    return &Arc{}, errors.New("chapter '" + ch.Title + "' did not match any Arcs")
}

// Parse a chapter and return it
func (ch *Chapter) Parse(done chan bool) {
    if ch.Retries > 3 {
        panic("Chapter url '" + ch.Url + "' has timed out too many times")
    }
    // Get the chapter
    if strings.HasPrefix(ch.Url, "http") == false {
        // Make sure it begins with http so goquery can use it
        ch.Url = "https://" + ch.Url
    }
    doc, err := goquery.NewDocument(ch.Url)
    if err != nil {
        // Try again
        ch.Retries++
        go ch.Parse(done)
        return
    }

    // Set the new chapter title
    ch.Title = doc.Find("h1.entry-title").Text()

    // Set the tags
    doc.Find(".entry-meta a[rel=tag]").Each(func(_ int, s *goquery.Selection) {
        ch.Tags = append(ch.Tags, s.Text())
        if len(ch.Tags) == 0 {
            ch.Tags = append(ch.Tags, "NONE")
        }
    })

    // Get the date it was posted
    ch.DatePosted = doc.Find("time.entry-date").Text()

    // Now we'll get all the paragraphs
    doc.Find(".entry-content > p").Each(func(_ int, s *goquery.Selection) {
        // Check for the previous/next links
        if len(s.Find("a").Nodes) > 0 {
            return
        }

        // Get the paragraph HTML
        st, _ := s.Html()
        para := Paragraph("")

        // Get the actual paragraph
        if val, exists := s.Attr("padding-left"); exists && val == "30px" {
            // Check to see if the paragraph is special (indented) block
            para = Paragraph("    " + st)
        } else if val, exists := s.Attr("text-align"); exists && val == "center" {
            // Otherwise check to see if it's a separator paragraph
            para = Paragraph("----------")
        } else {
            // It's just a normal paragraph in this case
            para = Paragraph(st)
        }

        // And add the paragraph to the chapter
        para.Format()
        ch.Paragraphs = append(ch.Paragraphs, para)
    })

    // Finally, let's signal a success
    done <- true
}

// Return a slice of Arcs extracted from the table of contents
func ParseArcs(s string) []*Arc {
    arcs := []*Arc{}
    r, _ := regexp.Compile(`[0-9]+`)
    for _, line := range strings.Split(s, "\n") {
        line = strings.TrimSpace(line)
        if strings.HasPrefix(line, "Arc") {
            arcs = append(arcs, &Arc{
                Identifier: r.FindString(line),
                Title:      line,
            })
        } else if strings.HasPrefix(line, "Epilogue") {
            arcs = append(arcs, &Arc{
                Identifier: "E",
                Title:      line,
            })
        }
    }
    return arcs
}

func main() {
    // Define the app
    app := cli.NewApp()
    app.Name = "Worm Scraper"
    app.Usage = "A tool to let you get an updated EPUB copy of the serial web novel Worm, by Wildbow"
    app.Version = "1.0"
    app.Author = "Benjamin Harris"

    // Define the application flags
    app.Flags = []cli.Flag{
        cli.BoolFlag{"pdf", "Save the book as a PDF instead of an EPUB, if possible"},
        cli.BoolFlag{"with-link", "Include a link to the chapter online"},
        cli.BoolFlag{"with-tags", "Include the tags each chapter was posted under"},
        cli.BoolFlag{"with-date", "Include the date each chapter was posted"},
    }

    // The heart of the application
    app.Action = func(context *cli.Context) {
        // Starting the program
        fmt.Println("Starting to scrape Worm")

        // Get the list of arcs from the table of contents
        fmt.Println("Gathering links from table of contents...")
        contents, err := goquery.NewDocument(TableOfContents)
        if err != nil {
            panic("Failed to get the table of contents! " + err.Error())
        }

        // Parse the arcs
        arcs := ParseArcs(contents.Find(".entry-content").Text())

        // Now get the links for the arc chapters
        contents.Find(".entry-content a:not([class*=share-icon])").Each(func(_ int, s *goquery.Selection) {
            ch := Chapter{}
            ch.Title = strings.Replace(strings.TrimSpace(s.Text()), "\n", "", -1)
            ch.Url, _ = s.Attr("href")

            if ch.Title == "" {
                return
            }

            arc, _ := ch.WhichArc(arcs)
            arc.Chapters = append(arc.Chapters, ch)
        })

        // Manually add missing chapter in Epilogue
        c := Chapter{
            Title: "E.2",
            Url:   "https://parahumans.wordpress.com/2013/11/05/teneral-e-2/",
        }
        a, _ := c.WhichArc(arcs)
        a.Chapters = append(a.Chapters, c)
        copy(a.Chapters[1+1:], a.Chapters[1:])
        a.Chapters[1] = c

        // Now start getting the chapters
        chapters := 0
        done := make(chan bool)
        for _, arc := range arcs {
            for i, _ := range arc.Chapters {
                chapters++
                go arc.Chapters[i].Parse(done)
            }
        }

        fmt.Println("Starting to parse", chapters, "chapters")
        fmt.Print("Finished: ")

        totalChapters := chapters
        for {
            select {
            case <-done:
                chapters--
                fmt.Print(totalChapters-chapters, ",")
            }
            if chapters == 0 {
                // We're done with all the chapters
                close(done)
                fmt.Println()
                break
            }
        }

        // And let's write all this stuff to a file now
        fmt.Println("Saving results to file...")
        f, err := os.OpenFile("Worm.md", os.O_RDWR|os.O_CREATE|os.O_EXCL, 0666)
        if err != nil {
            panic(err)
        }
        defer f.Close()

        // Define pagebreak
        PageBreak := "\n\n"

        // Write the cover
        f.WriteString("# Worm\n\n")
        f.WriteString("By Wildbow\n\n")
        f.WriteString("Website: " + MainSite)

        // Now loop through the Arcs
        for _, arc := range arcs {
            f.WriteString(PageBreak + "# " + arc.Title)
            for _, chapter := range arc.Chapters {
                f.WriteString("\n\n")
                f.WriteString("## " + chapter.Title + "\n\n")
                if context.Bool("with-tags") {
                    f.WriteString("**Tags:** " + strings.Join(chapter.Tags, ", ") + "  ")
                }
                if context.Bool("with-date") {
                    f.WriteString("**Date:** " + chapter.DatePosted + "  ")
                }
                if context.Bool("with-link") {
                    f.WriteString("**Link:** " + chapter.Url + "  ")
                }
                f.WriteString("\n\n")

                // Now save the chapter's paragraphs
                for _, p := range chapter.Paragraphs {
                    f.WriteString(string(p) + "\n\n")
                }
            }
        }

        // Now let's try to convert the markdown file into an ebook format (epub, pdf)
        fmt.Print("Attempting to convert Markdown file... ")
        cmdText := []string{"-S", "Worm.md", "--epub-chapter-level", "2", "-o", "Worm.epub"}
        if context.Bool("pdf") {
            cmdText = []string{"Worm.md", "-o", "Worm.pdf"}
            PageBreak = `<div style="page-break-after: always;"></div>`
        }
        cmd := exec.Command("pandoc", cmdText...)
        err = cmd.Run()
        if err != nil {
            fmt.Println("Conversion failed! Make sure you've installed Pandoc (http://johnmacfarlane.net/pandoc/installing.html) if you want to convert the generated Markdown file to an ebook compatible format. In the meantime, we've left you the Markdown file.")
        } else {
            _ = os.Remove("Worm.md")
            fmt.Println("Completed!")
        }
    }

    // Run the application
    app.Run(os.Args)
}

О, также было бы возможно изменить его для вывода как.txt или.mobi? если нет, я просто конвертирую, используя Caliber. Заранее спасибо. О, если это имеет значение, я использую Windows 7 64-бит

Answer 1

Компилятор go не импортирует библиотеки напрямую из Интернета, но знает, как их получить. Когда вы импортируете что-то вроде github.com/codegangsta/cli он не ищет его по этому URL, а ищет его в папке GOPATH/src.

go get Команда может получить библиотеку для вас в ее URL и загрузить ее на ваш GOPATH.

Если вы уже настроили GOPATH (если нет, прочитайте, как писать код Go), то перед запуском кода выполните команду go get library для инструмента Go, чтобы загрузить его для вас. В вашем примере вы должны выполнить следующие команды:

go get github.com/codegangsta/cli
go get github.com/puerkitobio/goquery

Что бы скачать библиотеки GOPATH/src/github.com/codegangsta/cli а также GOPATH/src/github.com/puerkitobio/goquery соответственно.