forked from coinbase/mesh-sdk-go
/
dsl.go
80 lines (71 loc) · 2.02 KB
/
dsl.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
// Copyright 2020 Coinbase, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package dsl
import (
"context"
"errors"
"fmt"
"log"
"os"
"path"
"github.com/HelloKashif/rosetta-sdk-go/constructor/job"
)
const (
// RosettaFileExtension is the file extension for all constructor files.
RosettaFileExtension = ".ros"
)
// Parse loads a Rosetta constructor file and attempts
// to parse it into []*job.Workflow.
func Parse(ctx context.Context, file string) ([]*job.Workflow, *Error) {
cleanedPath := path.Clean(file)
fileExtension := path.Ext(cleanedPath)
if fileExtension != RosettaFileExtension {
return nil, &Error{
Err: fmt.Errorf(
"%w: expected %s, got %s",
ErrIncorrectExtension,
RosettaFileExtension,
fileExtension,
),
}
}
f, err := os.Open(cleanedPath) // #nosec G304
if err != nil {
return nil, &Error{Err: fmt.Errorf("%w (%s): %s", ErrCannotOpenFile, cleanedPath, err)}
}
defer func() {
if err := f.Close(); err != nil {
log.Printf("%s: could not close %s\n", err.Error(), cleanedPath)
}
}()
p := newParser(f)
workflows := []*job.Workflow{}
workflowNames := map[string]struct{}{}
for ctx.Err() == nil {
workflow, err := p.parseWorkflow(ctx, workflowNames)
if errors.Is(err, ErrEOF) {
return workflows, nil
}
if err != nil {
return nil, &Error{
Err: err,
Line: p.lineNumber,
LineContents: p.lastLineRead,
}
}
workflowNames[workflow.Name] = struct{}{}
workflows = append(workflows, workflow)
}
return nil, &Error{Err: ctx.Err()}
}