35 lines
847 B
Go
35 lines
847 B
Go
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// Package bootstrap deals with the creation of bootstrap files
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package bootstrap
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import (
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"cryptic-net/tarutil"
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"fmt"
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"io"
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"io/fs"
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)
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// GetHashFromFS returns the hash of the contents of the given bootstrap file.
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// It may return nil if the bootstrap file doesn't have a hash.
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func GetHashFromFS(bootstrapFS fs.FS) ([]byte, error) {
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b, err := fs.ReadFile(bootstrapFS, tarutil.HashBinPath)
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if err != nil {
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return nil, fmt.Errorf("reading file %q from bootstrap fs: %w", tarutil.HashBinPath, err)
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}
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return b, nil
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}
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// GetHashFromReader reads the given tgz file as an fs.FS, and passes that to
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// GetHashFromFS.
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func GetHashFromReader(r io.Reader) ([]byte, error) {
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bootstrapFS, err := tarutil.FSFromReader(r)
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if err != nil {
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return nil, fmt.Errorf("reading tar fs from reader: %w", err)
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}
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return GetHashFromFS(bootstrapFS)
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}
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