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md5(str) returns the lowercase hexadecimal MD5 hash of str.

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Signature

md5(str string) string

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Example

Generate a cache key for a dependency installation step based on the contents of the lock file. If the lock file has not changed since the last run, the cache key stays the same: 
computed "dep_cache_key" {
  description = "Cache key based on lock file contents"
  expression  = "deps-${md5(file("go.sum"))}"
}

task "restore-cache" {
  description = "Restore the module cache if available"
  commands    = ["cache restore ${computed.dep_cache_key} || true"]
}

task "install" {
  description = "Download Go module dependencies"
  depends_on  = [task.restore-cache]
  commands    = ["go mod download"]
}

task "save-cache" {
  description = "Save the module cache"
  depends_on  = [task.install]
  commands    = ["cache save ${computed.dep_cache_key}"]
}

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Notes

  • MD5 is suitable for cache keys and checksums but not for security-sensitive hashing. Use sha256 for integrity verification.
  • The output is always a 32-character lowercase hexadecimal string.