name_pattern.go

Blame: the commit that last changed each line · file · history

`c62570e2` 2022-09-23 Pavel Safronov	1	package main
	2
`71bdf574` 2022-09-23 Pavel Safronov	3	import (
	4	"errors"
`05f9e8ef` 2022-10-06 Pavel Safronov	5	"fmt"
`71bdf574` 2022-09-23 Pavel Safronov	6	"strings"
	7	"text/template"
	8	"time"
	9	)
`c62570e2` 2022-09-23 Pavel Safronov	10
`687d5626` 2022-10-28 Pavel Safronov	11	func createNewNameForPatterns(
	12	now time.Time,
`8c15a714` 2022-11-04 Pavel Safronov	13	patternData PrePatternData,
`687d5626` 2022-10-28 Pavel Safronov	14	projectName string,
	15	namePatterns []ParameterizedText,
`10676da3` 2022-11-06 Pavel Safronov	16	extras map[string]string,
	17	validator func(newName string) bool) (string, error) {
`5e7795dc` 2022-10-21 Pavel Safronov	18	for index, namePattern := range namePatterns {
`71bdf574` 2022-09-23 Pavel Safronov	19
	20	startingVersion := 1
	21	invokeCount := 0
	22	funcMap := template.FuncMap{
	23	"getVersion": func() int {
	24	invokeCount++
	25	return startingVersion
	26	},
	27	}
	28	template := template.New("template-name").Funcs(funcMap)
	29
	30	for {
	31
`1a02ef4e` 2022-10-21 Pavel Safronov	32	template, err := template.Parse(string(namePattern))
`71bdf574` 2022-09-23 Pavel Safronov	33	if err != nil {
`8c15a714` 2022-11-04 Pavel Safronov	34	return "", fmt.Errorf("error parsing name pattern %d: %w", index, err)
`71bdf574` 2022-09-23 Pavel Safronov	35	}
	36
	37	sb := new(strings.Builder)
	38	err = template.Execute(sb, patternData)
	39	if err != nil {
`8c15a714` 2022-11-04 Pavel Safronov	40	return "", fmt.Errorf("error executing name pattern %d: %w", index, err)
`71bdf574` 2022-09-23 Pavel Safronov	41	}
	42
	43	newName := sb.String()
`10676da3` 2022-11-06 Pavel Safronov	44	isValid := validator(newName)
`71bdf574` 2022-09-23 Pavel Safronov	45	useIndex := invokeCount > 0
`5e7795dc` 2022-10-21 Pavel Safronov	46	isLastPattern := index == len(namePatterns)-1
`71bdf574` 2022-09-23 Pavel Safronov	47
`10676da3` 2022-11-06 Pavel Safronov	48	// if new name is valid, use this name
	49	if isValid {
`8c15a714` 2022-11-04 Pavel Safronov	50	return newName, nil
`71bdf574` 2022-09-23 Pavel Safronov	51	}
`10676da3` 2022-11-06 Pavel Safronov	52
`71bdf574` 2022-09-23 Pavel Safronov	53	// if index is not being used (template did not invoke getVersion)
	54	// then we're done
	55	if !useIndex {
	56	break
	57	}
	58
	59	// if getVersion was used, but this isn't the last pattern, report an error
	60	if useIndex && !isLastPattern {
`8c15a714` 2022-11-04 Pavel Safronov	61	return "", errors.New("cannot use function getVersion in a pattern that is not the last pattern")
`71bdf574` 2022-09-23 Pavel Safronov	62	}
	63
	64	startingVersion++
	65	}
	66	}
`8c15a714` 2022-11-04 Pavel Safronov	67	return "", errors.New("couldn't find a new name")
`71bdf574` 2022-09-23 Pavel Safronov	68	}