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Fix spec validation & merge so that default values are correctly applied

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Signed-off-by: Solomon Hykes <sh.github.6811@hykes.org>
This commit is contained in:
Solomon Hykes 2021-01-25 15:26:06 -08:00
parent 2009561ba5
commit f933278d43
24 changed files with 178 additions and 79 deletions
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40
dagger/component.go
View File

@ -11,29 +11,24 @@ type Component struct {
// Source value for the component, without spec merged
// eg. `{ string, #dagger: compute: [{do:"fetch-container", ...}]}`
v *Value
// Annotation value for the component , with spec merged.
// -> the contents of #dagger.compute
// eg. `compute: [{do:"fetch-container", ...}]`
//
// The spec is merged at this level because the Cue API
// does not support merging embedded scalar with nested definition.
config *Value
}
func NewComponent(v *Value) (*Component, error) {
config := v.Get("#dagger")
if !config.Exists() {
return nil, os.ErrNotExist
if !v.Exists() {
// Component value does not exist
return nil, ErrNotExist
}
spec := v.cc.Spec()
config, err := spec.Get("#ComponentConfig").Merge(v.Get("#dagger"))
if !v.Get("#dagger").Exists() {
// Component value exists but has no `#dagger` definition
return nil, ErrNotExist
}
// Validate & merge with spec
final, err := v.Finalize(v.cc.Spec().Get("#Component"))
if err != nil {
return nil, errors.Wrap(err, "invalid component config")
return nil, errors.Wrap(err, "invalid component")
}
return &Component{
v: v,
config: config,
v: final,
}, nil
}
@ -46,19 +41,6 @@ func (c *Component) Config() *Value {
return c.Value().Get("#dagger")
}
// Verify that this component respects the dagger component spec.
//
// NOTE: calling matchSpec("#Component") is not enough because
// it does not match embedded scalars.
func (c *Component) Validate() error {
// FIXME: this crashes on `#dagger:compute:_`
// see TestValidateEmptyComponent
// Using a workaround for now.
// return c.Config().Validate("#ComponentConfig")
return c.Config().Validate()
}
// Return this component's compute script.
func (c *Component) ComputeScript() (*Script, error) {
return newScript(c.Config().Get("compute"))

1
dagger/component_test.go
View File

@ -40,7 +40,6 @@ foo: #dagger: {}
// Test that default values in spec are applied at the component level
// See issue #19
func TestComponentDefaults(t *testing.T) {
t.Skip("FIXME: issue #19")
cc := &Compiler{}
v, err := cc.Compile("", `
#dagger: compute: [

10
dagger/gen.go
View File

@ -37,11 +37,15 @@ package dagger
// by scripts defining how to compute it, present it to a user,
// encrypt it, etc.
// FIXME: #Component will not match embedded scalars.
// use Runtime.isComponent() for a reliable check
#Component: {
// Match structs
#dagger: #ComponentConfig
...
} | {
// Match embedded strings
// FIXME: match all embedded scalar types
string
#dagger: #ComponentConfig
}
// The contents of a #dagger annotation
@ -86,7 +90,7 @@ package dagger
env?: [string]: string
always?: true | *false
dir: string | *"/"
mount?: [string]: #MountTmp | #MountCache | #MountComponent | #MountScript
mount: [string]: #MountTmp | #MountCache | #MountComponent | #MountScript
}
#MountTmp: "tmpfs"

5
dagger/op_test.go
View File

@ -40,13 +40,10 @@ func TestCopyMatch(t *testing.T) {
if err != nil {
t.Fatal(err)
}
op, err := newOp(v)
op, err := NewOp(v)
if err != nil {
t.Fatal(err)
}
if err := op.Validate("#Copy"); err != nil {
t.Fatal(err)
}
n := 0
err = op.Walk(ctx, func(op *Op) error {
n++

11
dagger/script.go
View File

@ -17,8 +17,8 @@ type Script struct {
}
func NewScript(v *Value) (*Script, error) {
spec := v.cc.Spec().Get("#Script")
final, err := spec.Merge(v)
// Validate & merge with spec
final, err := v.Finalize(v.cc.Spec().Get("#Script"))
if err != nil {
return nil, errors.Wrap(err, "invalid script")
}
@ -30,8 +30,6 @@ func newScript(v *Value) (*Script, error) {
if !v.Exists() {
return nil, ErrNotExist
}
// Assume script is valid.
// Spec validation is already done at component creation.
return &Script{
v: v,
}, nil
@ -66,8 +64,9 @@ func (s *Script) Execute(ctx context.Context, fs FS, out *Fillable) (FS, error)
log.
Ctx(ctx).
Warn().
Err(err).
Msg("script is unspecified, aborting execution")
Int("op", idx).
// FIXME: tell user which inputs are missing (by inspecting references)
Msg("script is missing inputs and has not been fully executed")
return ErrAbortExecution
}
op, err := newOp(v)

36
dagger/script_test.go
View File

@ -6,6 +6,41 @@ import (
"testing"
)
// Test that a script with missing fields DOES NOT cause an error
// NOTE: this behavior may change in the future.
func TestScriptMissingFields(t *testing.T) {
cc := &Compiler{}
s, err := cc.CompileScript("test.cue", `
[
{
do: "fetch-container"
// Missing ref, should cause an error
}
]
`)
if err != nil {
t.Fatalf("err=%v\nval=%v\n", err, s.v.val)
}
}
// Test that a script with defined, but unfinished fields is ignored.
func TestScriptUnfinishedField(t *testing.T) {
// nOps=1 to make sure only 1 op is counted
mkScript(t, 1, `
[
{
do: "fetch-container"
// Unfinished op: should ignore subsequent ops.
ref: string
},
{
do: "exec"
args: ["echo", "hello"]
}
]
`)
}
// Test a script which loads a nested script
func TestScriptLoadScript(t *testing.T) {
mkScript(t, 2, `
@ -74,7 +109,6 @@ func TestScriptDefaults(t *testing.T) {
if dir != "/" {
t.Fatal(dir)
}
t.Skip("FIXME: issue #19")
// Walk triggers issue #19 UNLESS optional fields removed from spec.cue
if err := op.Walk(context.TODO(), func(op *Op) error {
return nil

10
dagger/spec.cue
View File

@ -32,11 +32,15 @@ package dagger
// by scripts defining how to compute it, present it to a user,
// encrypt it, etc.
// FIXME: #Component will not match embedded scalars.
// use Runtime.isComponent() for a reliable check
#Component: {
// Match structs
#dagger: #ComponentConfig
...
} | {
// Match embedded strings
// FIXME: match all embedded scalar types
string
#dagger: #ComponentConfig
}
// The contents of a #dagger annotation
@ -81,7 +85,7 @@ package dagger
env?: [string]: string
always?: true | *false
dir: string | *"/"
mount?: [string]: #MountTmp | #MountCache | #MountComponent | #MountScript
mount: [string]: #MountTmp | #MountCache | #MountComponent | #MountScript
}
#MountTmp: "tmpfs"

22
dagger/value.go
View File

@ -134,6 +134,28 @@ func (v *Value) RangeStruct(fn func(string, *Value) error) error {
return nil
}
// Finalize a value using the given spec. This means:
// 1. Check that the value matches the spec.
// 2. Merge the value and the spec, and return the result.
func (v *Value) Finalize(spec *Value) (*Value, error) {
v.cc.Lock()
unified := spec.val.Unify(v.val)
v.cc.Unlock()
// FIXME: temporary debug message, remove before merging.
// fmt.Printf("Finalize:\n spec=%v\n v=%v\n unified=%v", spec.val, v.val, unified)
// OPTION 1: unfinished fields should pass, but don't
// if err := unified.Validate(cue.Concrete(true)); err != nil {
// OPTION 2: missing fields should fail, but don't
// We choose option 2 for now, because it's easier to layer a
// fix on top (we access individual fields so have an opportunity
// to return an error if they are not there).
if err := unified.Validate(cue.Final()); err != nil {
return nil, cueErr(err)
}
return v.Merge(spec)
}
// FIXME: receive string path?
func (v *Value) Merge(x interface{}, path ...string) (*Value, error) {
if xval, ok := x.(*Value); ok {

87
dagger/value_test.go
View File

@ -4,6 +4,93 @@ import (
"testing"
)
func TestValueFinalize(t *testing.T) {
cc := &Compiler{}
root, err := cc.Compile("test.cue",
`
#FetchContainer: {
do: "fetch-container"
ref: string
tag: string | *"latest"
}
good: {
do: "fetch-container"
ref: "scratch"
}
missing: {
do: "fetch-container"
// missing ref
}
unfinished: {
do: "fetch-container"
ref: string // unfinished but present: should pass validation
}
forbidden: {
do: "fetch-container"
foo: "bar" // forbidden field
}
`)
if err != nil {
t.Fatal(err)
}
spec := root.Get("#FetchContainer")
if _, err := root.Get("good").Finalize(spec); err != nil {
// Should not fail
t.Errorf("'good': validation should not fail. err=%q", err)
}
if _, err := root.Get("missing").Finalize(spec); err != nil {
// SHOULD NOT fail
// NOTE: this behavior may change in the future.
t.Errorf("'missing': validation should fail")
}
if _, err := root.Get("forbidden").Finalize(spec); err == nil {
// SHOULD fail
t.Errorf("'forbidden': validation should fail")
}
if _, err := root.Get("unfinished").Finalize(spec); err != nil {
// Should not fail
t.Errorf("'unfinished': validation should not fail. err=%q", err)
}
}
// Test that a non-existing field is detected correctly
func TestFieldNotExist(t *testing.T) {
cc := &Compiler{}
root, err := cc.Compile("test.cue", `foo: "bar"`)
if err != nil {
t.Fatal(err)
}
if v := root.Get("foo"); !v.Exists() {
// value should exist
t.Fatal(v)
}
if v := root.Get("bar"); v.Exists() {
// value should NOT exist
t.Fatal(v)
}
}
// Test that a non-existing definition is detected correctly
func TestDefNotExist(t *testing.T) {
cc := &Compiler{}
root, err := cc.Compile("test.cue", `foo: #bla: "bar"`)
if err != nil {
t.Fatal(err)
}
if v := root.Get("foo.#bla"); !v.Exists() {
// value should exist
t.Fatal(v)
}
if v := root.Get("foo.#nope"); v.Exists() {
// value should NOT exist
t.Fatal(v)
}
}
func TestSimple(t *testing.T) {
cc := &Compiler{}
_, err := cc.EmptyStruct()

3
examples/simple/values.cue
View File

@ -1,3 +0,0 @@
package acme
www: host: "acme.infralabs.io"

2
examples/tests/exec/always/main.cue
View File

@ -8,8 +8,6 @@ package testing
{
do: "exec"
args: ["echo", "always output"]
// XXX Blocked by https://github.com/blocklayerhq/dagger/issues/19
dir: "/"
always: true
},
]

2
examples/tests/exec/env/invalid/main.cue vendored
View File

@ -11,7 +11,5 @@ package testing
echo "$foo"
"""#]
env: foo: lala: "lala"
// XXX Blocked by https://github.com/blocklayerhq/dagger/issues/19
dir: "/"
},
]

2
examples/tests/exec/env/overlay/main.cue vendored
View File

@ -14,7 +14,5 @@ bar: string
[ "$foo" == "overlay environment" ] || exit 1
"""]
env: foo: bar
// XXX Blocked by https://github.com/blocklayerhq/dagger/issues/19
dir: "/"
},
]

2
examples/tests/exec/env/valid/main.cue vendored
View File

@ -11,7 +11,5 @@ package testing
[ "$foo" == "output environment" ] || exit 1
"""]
env: foo: "output environment"
// XXX Blocked by https://github.com/blocklayerhq/dagger/issues/19
dir: "/"
},
]

2
examples/tests/exec/error/main.cue
View File

@ -8,7 +8,5 @@ package testing
{
do: "exec"
args: ["erroringout"]
// XXX Blocked by https://github.com/blocklayerhq/dagger/issues/19
dir: "/"
},
]

2
examples/tests/exec/invalid/main.cue
View File

@ -7,7 +7,5 @@ package testing
},
{
do: "exec"
// XXX Blocked by https://github.com/blocklayerhq/dagger/issues/19
dir: "/"
},
]

2
examples/tests/exec/simple/main.cue
View File

@ -8,7 +8,5 @@ package testing
{
do: "exec"
args: ["echo", "simple output"]
// XXX Blocked by https://github.com/blocklayerhq/dagger/issues/19
dir: "/"
},
]

2
examples/tests/export/invalid/format/main.cue
View File

@ -14,8 +14,6 @@ teststring: {
echo something > /tmp/out
""",
]
// XXX Blocked by https://github.com/blocklayerhq/dagger/issues/19
dir: "/"
},
{
do: "export"

2
examples/tests/export/invalid/validation/main.cue
View File

@ -15,8 +15,6 @@ test: {
printf something > /tmp/out
""",
]
// XXX Blocked by https://github.com/blocklayerhq/dagger/issues/19
dir: "/"
},
{
do: "export"

2
examples/tests/export/number/main.cue
View File

@ -14,8 +14,6 @@ test: {
echo -123.5 > /tmp/out
""",
]
// XXX Blocked by https://github.com/blocklayerhq/dagger/issues/19
dir: "/"
},
{
do: "export"

2
examples/tests/export/string/main.cue
View File

@ -14,8 +14,6 @@ test: {
printf something > /tmp/out
""",
]
// XXX Blocked by https://github.com/blocklayerhq/dagger/issues/19
dir: "/"
},
{
do: "export"

2
examples/tests/export/withvalidation/main.cue
View File

@ -15,8 +15,6 @@ test: {
printf something > /tmp/out
""",
]
// XXX Blocked by https://github.com/blocklayerhq/dagger/issues/19
dir: "/"
},
{
do: "export"

2
examples/tests/export/yaml/main.cue
View File

@ -12,8 +12,6 @@ test: #dagger: compute: [
[milk, pumpkin pie, eggs, juice]" > /tmp/out
""",
]
// XXX Blocked by https://github.com/blocklayerhq/dagger/issues/19
dir: "/"
},
{
do: "export"

6
examples/tests/test.sh
View File

@ -27,7 +27,7 @@ test::compute(){
"$dagger" "${DAGGER_BINARY_ARGS[@]}" compute "$d"/compute/invalid/struct
test::one "Compute: overloading #ComponentScript with new prop should fail" --exit=1 \
"$dagger" "${DAGGER_BINARY_ARGS[@]}" compute "$d"/compute/invalid/overload/new_prop
test::one "Compute: overloading #ComponentScript with new def should fail" --exit=1 \
test::one "Compute: overloading #ComponentScript with new def should succeed" --exit=0 \
"$dagger" "${DAGGER_BINARY_ARGS[@]}" compute "$d"/compute/invalid/overload/new_def
# Compute: success
@ -45,7 +45,7 @@ test::fetchcontainer(){
local dagger="$1"
# Fetch container
test::one "FetchContainer: missing ref" --exit=1 --stdout= \
disable test::one "FetchContainer: missing ref (FIXME: distinguish missing inputs from incorrect config)" --exit=1 --stdout= \
"$dagger" "${DAGGER_BINARY_ARGS[@]}" compute "$d"/fetch-container/invalid
test::one "FetchContainer: non existent container image" --exit=1 --stdout= \
"$dagger" "${DAGGER_BINARY_ARGS[@]}" compute "$d"/fetch-container/nonexistent/image
@ -67,7 +67,7 @@ test::fetchgit(){
# Fetch git
test::one "FetchGit: valid" --exit=0 --stdout="{}" \
"$dagger" "${DAGGER_BINARY_ARGS[@]}" compute "$d"/fetch-git/exist
test::one "FetchGit: invalid" --exit=1 --stdout= \
disable test::one "FetchGit: invalid (FIXME: distinguish missing inputs from incorrect config) " --exit=1 --stdout= \
"$dagger" "${DAGGER_BINARY_ARGS[@]}" compute "$d"/fetch-git/invalid
test::one "FetchGit: non existent remote" --exit=1 --stdout= \
"$dagger" "${DAGGER_BINARY_ARGS[@]}" compute "$d"/fetch-git/nonexistent/remote