42 lines
847 B
Go
42 lines
847 B
Go
package next
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import (
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"errors"
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"fmt"
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"log"
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"path/filepath"
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"regexp"
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cmdpkg "github.com/brtholomy/um/go/cmd"
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)
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const (
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GLOB = "[0-9]*.md"
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// we only care about the number group:
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FILE_REGEXP = `(?m)^([0-9]+)\.[[:alpha:]]*\.*md$`
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NOT_FOUND_MSG = "um files not found: " + GLOB
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)
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var fileRegexp *regexp.Regexp = regexp.MustCompile(FILE_REGEXP)
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// get the lexical last file from GLOB
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func last() (string, error) {
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// NOTE: filepath.Glob is more reliable than a manual ls call:
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filelist, err := filepath.Glob(GLOB)
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if err != nil {
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return "", err
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}
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if len(filelist) == 0 {
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return "", errors.New(NOT_FOUND_MSG)
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}
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return filelist[len(filelist)-1], nil
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}
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func Last() {
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s, err := last()
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if err != nil {
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log.Fatalf("um %s: %v", cmdpkg.Last, err)
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}
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// send to stdout, not stderr as is default for log.Print:
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fmt.Println(s)
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}
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