mirror of
https://github.com/osmarks/mycorrhiza.git
synced 2024-10-30 03:36:16 +00:00
92 lines
2.3 KiB
Go
92 lines
2.3 KiB
Go
// Package migration holds the utilities for migrating from older incompatible Mycomarkup versions.
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//
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// Migrations are meant to be removed couple of versions after being introduced.
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//
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// Available migrations:
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// - Rocket links
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// - Headings
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package migration
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import (
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"github.com/bouncepaw/mycorrhiza/history"
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"github.com/bouncepaw/mycorrhiza/hyphae"
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"github.com/bouncepaw/mycorrhiza/user"
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"io"
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"log"
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"os"
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"strings"
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)
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func genericLineMigrator(
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commitMessage string,
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migrator func(string) string,
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commitErrorMessage string,
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) {
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var (
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hop = history.
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Operation(history.TypeMarkupMigration).
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WithMsg(commitMessage).
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WithUser(user.WikimindUser())
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mycoFiles = []string{}
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)
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for hypha := range hyphae.FilterHyphaeWithText(hyphae.YieldExistingHyphae()) {
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/// Open file, read from file, modify file. If anything goes wrong, scream and shout.
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file, err := os.OpenFile(hypha.TextFilePath(), os.O_RDWR, 0766)
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if err != nil {
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hop.WithErrAbort(err)
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log.Fatal("Something went wrong when opening ", hypha.TextFilePath(), ": ", err.Error())
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}
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var buf strings.Builder
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_, err = io.Copy(&buf, file)
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if err != nil {
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hop.WithErrAbort(err)
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_ = file.Close()
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log.Fatal("Something went wrong when reading ", hypha.TextFilePath(), ": ", err.Error())
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}
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var (
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oldText = buf.String()
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newText = migrator(oldText)
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)
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if oldText != newText { // This file right here is being migrated for real.
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mycoFiles = append(mycoFiles, hypha.TextFilePath())
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err = file.Truncate(0)
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if err != nil {
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hop.WithErrAbort(err)
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_ = file.Close()
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log.Fatal("Something went wrong when truncating ", hypha.TextFilePath(), ": ", err.Error())
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}
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_, err = file.Seek(0, 0)
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if err != nil {
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hop.WithErrAbort(err)
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_ = file.Close()
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log.Fatal("Something went wrong when seeking in ", hypha.TextFilePath(), ": ", err.Error())
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}
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_, err = file.WriteString(newText)
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if err != nil {
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hop.WithErrAbort(err)
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_ = file.Close()
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log.Fatal("Something went wrong when writing to ", hypha.TextFilePath(), ": ", err.Error())
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}
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}
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_ = file.Close()
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}
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if len(mycoFiles) == 0 {
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hop.Abort()
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return
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}
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if hop.WithFiles(mycoFiles...).Apply().HasErrors() {
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log.Fatal(commitErrorMessage, hop.FirstErrorText())
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}
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log.Println("Migrated", len(mycoFiles), "Mycomarkup documents")
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}
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