Introduce new format pattern + port json processing #550
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wagoodman
commented
Oct 18, 2021
syft/format/format.go
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| return f.decoder(reader) | ||
| } | ||
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| func (f Format) Detect(b []byte) bool { |
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From @luhring : could this be Validate ?
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(and if so, probably adjust the signature to be consistent with our new Validator concept (e.g. return an error))
wagoodman
commented
Oct 18, 2021
syft/format/format.go
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| } | ||
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| if err := f.validator(bytes.NewReader(b)); err != nil { | ||
| return false |
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From @spiffcs : maybe log debug?
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logging here probably won't be helpful since we're expecting validation errors (which could get noisy)
spiffcs
approved these changes
Oct 18, 2021
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| // Encode takes all SBOM elements and a format option and encodes an SBOM document. | ||
| // TODO: encapsulate input data into common sbom document object |
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Want me to keep track of the TODO still found in this PR and break them into separate smaller issues to solve?
luhring
approved these changes
Oct 18, 2021
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| import "io" | ||
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| type Validator func(reader io.Reader) error |
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nit: For future implementers, it could be nice to add a doc comment to explain what's intended to be implemented in a Validator. E.g., // A Validator assess the input to determine blah blah blah ...
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agreed -- let me follow up with some useful doc strings
| return err | ||
| } | ||
| s.Target = payload | ||
| default: |
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nit: blank line above this line for consistency within the switch
| return fmt.Errorf("unable to decode: %w", err) | ||
| } | ||
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| // note: we accept al schema versions |
internal/formats/formats.go
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| func Identify(by []byte) (*format.Format, error) { | ||
| for _, f := range All() { | ||
| if f.Detect(by) { |
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(Potentially changing this to create a new reader, based on a previous comment)
internal/formats/formats_test.go
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| ) | ||
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| func TestIdentify(t *testing.T) { | ||
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Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
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* add new format pattern Signed-off-by: Alex Goodman <alex.goodman@anchore.com> * add syftjson format Signed-off-by: Alex Goodman <alex.goodman@anchore.com> * add internal formats helper Signed-off-by: Alex Goodman <alex.goodman@anchore.com> * add SBOM encode/decode to lib API Signed-off-by: Alex Goodman <alex.goodman@anchore.com> * remove json presenter + update presenter tests to use common utils Signed-off-by: Alex Goodman <alex.goodman@anchore.com> * remove presenter format enum type + add formats shim in presenter helper Signed-off-by: Alex Goodman <alex.goodman@anchore.com> * add MustCPE helper for tests Signed-off-by: Alex Goodman <alex.goodman@anchore.com> * update usage of format enum Signed-off-by: Alex Goodman <alex.goodman@anchore.com> * add test fixtures for encode/decode tests Signed-off-by: Alex Goodman <alex.goodman@anchore.com> * fix integration test Signed-off-by: Alex Goodman <alex.goodman@anchore.com> * migrate format detection to use reader Signed-off-by: Alex Goodman <alex.goodman@anchore.com> * address review comments Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
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Partially addresses anchore/grype#395
Today we have the
presenterabstraction to write out internal SBOM results to a particular format (e.g. JSON, table, SPDX, CycloneDX). All model details about the format itself is contained under the presenter objects themselves. This abstraction was never meant to encapsulate handling intake (parsing) of these formats. As we add more formats it would be ideal to be able to parse these formats for use in other tools (such as syft). For this reason this PR adds a newformatabstraction for specifying encoding/decoding details for a particular SBOM format (and the presenter can use format encoders to deal with presentation concerns).The first commit of this PR adds the new format abstractions:
type Encoder ...: a function signature for encoding a given set of SBOM objects into bytes that are written to a writer.type Decoder ...: a function signature for decoding an SBOM from a reader and returning SBOM objects.type Validator ...: a function signature for observing the bytes of an SBOM document via a reader and returns any errors if the given document is not of a specific format.type Format ...: ties together the above bits of functionality into a single object tied to a specificformat.Option(with helper functions)This new pattern allows for:
This PR ports encoding from the syft presenters and decoding from the grype pkg.Provider implementation for the
syftjsonformat.Additionally the encode/decode behavior has been exposed in the syft top-level API , bypassing the presenter abstraction for the typical user (where deferred encoding is not necessary).