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`mfer version`, `mfer --version` and the banner print the revision the build stamps into main.Gitrev or, when it stamped none (as after `go install` of a tag), the main module's version from runtime/debug.ReadBuildInfo. The banner no longer shows a release date. mfer.Version and mfer.ReleaseDate go, with main.Version and the version field and parameter in internal/cli that nothing read. A program using the library reads the module version from its own build information. The README says where the version comes from. Judgement call: a binary with no build information, or none holding a module version, prints "unknown", the word script/build already uses when git describe gives nothing. Model: opus-5-5
46 lines
1.8 KiB
Go
46 lines
1.8 KiB
Go
package mfer
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const (
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// MaxDecompressedSize is the maximum allowed size of decompressed manifest
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// data (256 MiB). This prevents decompression bombs from consuming excessive
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// memory.
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MaxDecompressedSize int64 = 256 * 1024 * 1024
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// MaxManifestSize is the largest manifest file mfer reads (258 MiB).
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// zstd's worst case grows data it cannot compress by 1/256, so an inner
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// message of MaxDecompressedSize compresses to at most 257 MiB; the
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// last MiB is room for the signature, the signing key and the other
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// outer fields.
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MaxManifestSize = MaxDecompressedSize + MaxDecompressedSize/256 + 1<<20
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// zstdWindowSize is the zstd window zstd.SpeedBestCompression gives mfer's writer.
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zstdWindowSize = 8 << 20
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// uuidLength is the length in bytes of a binary UUID.
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uuidLength = 16
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// Numbers in mf.proto of MFFile.files and of the MFFilePath fields
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// that decoding sets aside a fixed amount of memory for.
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filesFieldNumber = 101
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hashesFieldNumber = 3
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mimeTypeFieldNumber = 301
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mtimeFieldNumber = 302
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ctimeFieldNumber = 303
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// Bytes decoding sets aside for each file entry, hash, timestamp and
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// MIME type, however short its encoding. checkDecodedSize refuses an
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// inner message for which these add up to more than maxDecodedGrowth
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// times its size. The mode is held in the file entry itself.
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decodedFileEntrySize = 176
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decodedHashSize = 112
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decodedTimestampSize = 64
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decodedMIMETypeSize = 16
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// Each file entry mfer writes holds a path of at least one byte, a
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// multihash at least as long as SHA-256's 34 bytes (AddFileWithHash
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// refuses shorter ones) and a modification time: at least 47 bytes,
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// counted at 352. So its manifests add up to at most about 7.49 times
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// their size, and this limit is about 7% above that.
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maxDecodedGrowth = 8
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)
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