forked from cerc-io/ipld-eth-server
56 lines
933 B
Go
56 lines
933 B
Go
package mfsr
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import (
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"fmt"
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"io/ioutil"
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"os"
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"path"
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"strconv"
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"strings"
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)
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const VersionFile = "version"
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type RepoPath string
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func (rp RepoPath) VersionFile() string {
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return path.Join(string(rp), VersionFile)
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}
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func (rp RepoPath) Version() (int, error) {
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if rp == "" {
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return 0, fmt.Errorf("invalid repo path \"%s\"", rp)
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}
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fn := rp.VersionFile()
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if _, err := os.Stat(fn); err != nil {
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return 0, err
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}
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c, err := ioutil.ReadFile(fn)
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if err != nil {
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return 0, err
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}
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s := strings.TrimSpace(string(c))
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return strconv.Atoi(s)
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}
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func (rp RepoPath) CheckVersion(version int) error {
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v, err := rp.Version()
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if err != nil {
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return err
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}
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if v != version {
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return fmt.Errorf("versions differ (expected: %d, actual:%d)", version, v)
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}
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return nil
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}
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func (rp RepoPath) WriteVersion(version int) error {
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fn := rp.VersionFile()
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return ioutil.WriteFile(fn, []byte(fmt.Sprintf("%d\n", version)), 0644)
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}
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