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https://github.com/wader/fq.git
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109 lines
2.0 KiB
Go
109 lines
2.0 KiB
Go
// Takes markdown on stdin and outputs same markdown with shell commands expanded
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// lines inside sh sections ending with non-breaking-space " " will be kept and
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// those starting with $ will also be executed as shell commands and output will
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// be inserted.
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// <pre sh>
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// # comment
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// $ echo test
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// will be replaced
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// </pre>
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// Becomes:
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// <pre sh>
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// # comment
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// $ echo test
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// test
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// </pre>
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//
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// ```sh (sh)
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// # comment
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// $ echo test
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// will be replaced
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// ```
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// Becomes:
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// ```sh (sh)
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// # comment
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// $ echo test
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// test
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// ```
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//
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// [echo test]: sh-start
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// will be replaced
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// [#]: sh-end
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// Becomes:
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// [echo test]: sh-start
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// test
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// [#]: sh-end
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//nolint:gosec
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package main
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import (
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"bufio"
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"fmt"
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"os"
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"os/exec"
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"regexp"
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"strings"
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)
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func main() {
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scanner := bufio.NewScanner(os.Stdin)
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nextLine := func() (string, bool) {
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ok := scanner.Scan()
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return scanner.Text(), ok
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}
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preShRe := regexp.MustCompile("<pre sh>")
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shRe := regexp.MustCompile("```.* \\(sh\\)")
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const nonBreakingSpace = rune(0xa0) // -> " "
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shStartRe := regexp.MustCompile(`\[(.*)\]: sh-start`)
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shEnd := "[#]: sh-end"
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for {
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l, ok := nextLine()
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if !ok {
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break
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}
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preShReMatches := preShRe.MatchString(l)
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shReMatches := shRe.MatchString(l)
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if preShReMatches || shReMatches {
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fmt.Println(l)
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for {
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l, ok := nextLine()
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if !ok || ((shReMatches && l == "```") || preShReMatches && l == "</pre>") {
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fmt.Println(l)
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break
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}
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rl := []rune(l)
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if len(rl) >= 1 && rl[len(rl)-1] == nonBreakingSpace {
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fmt.Println(l)
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if strings.HasPrefix(l, "$") {
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cmd := exec.Command("sh", "-c", l[1:len(l)-2])
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o, _ := cmd.CombinedOutput()
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fmt.Print(string(o))
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}
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}
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}
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} else if sm := shStartRe.FindStringSubmatch(l); sm != nil {
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fmt.Println(l)
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fmt.Println()
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for {
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l, ok := nextLine()
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if !ok || l == shEnd {
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break
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}
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}
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cmd := exec.Command("sh", "-c", sm[1])
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o, _ := cmd.CombinedOutput()
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fmt.Print(string(o))
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fmt.Println()
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fmt.Println(shEnd)
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} else {
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fmt.Println(l)
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}
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}
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}
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