This repository has been archived by the owner on Sep 5, 2023. It is now read-only.
/
execute.go
83 lines (63 loc) · 1.7 KB
/
execute.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
81
82
83
// Copyright 2021 VMware, Inc.
// SPDX-License-Identifier: MIT
package instructions
import (
"context"
"fmt"
"github.com/op/go-logging"
"github.com/vmware-tanzu-labs/yaml-overlay-tool/internal/overlays"
"golang.org/x/sync/errgroup"
)
var log = logging.MustGetLogger("instructions") //nolint:gochecknoglobals
// Execute takes in configuratation options and executes overlays on an instruction file specified.
func Execute(cfg *Config) error {
eg, ctx := errgroup.WithContext(context.Background())
instructions, err := cfg.GetInstructions()
if err != nil {
return err
}
pChan := make(chan *YamlFile, len(instructions.YamlFiles))
for _, yamlFile := range instructions.YamlFiles {
yf := yamlFile
eg.Go(
func() error {
stream := overlays.NewWorkStream()
stream.StartStream()
go yf.queueOverlays(stream)
if err := stream.StartHandler(); err != nil {
return fmt.Errorf("%w", err)
}
select {
case pChan <- yf:
return nil
case <-ctx.Done():
if err := ctx.Err(); err != nil {
return fmt.Errorf("%w", err)
}
return nil
}
},
)
}
go func() {
eg.Wait() //nolint:errcheck // we use this to gracefully close the channel and receive the err later
close(pChan)
}()
if err := PostProcessHandler(cfg, pChan); err != nil {
return err
}
if err := eg.Wait(); err != nil {
return fmt.Errorf("%w", err)
}
return nil
}
// PostProcessHandler waits for YamlFile objects and preforms post overlay tasks like rendering,
// saving to file or displaying to screen.
func PostProcessHandler(cfg *Config, pChan <-chan *YamlFile) error {
for yf := range pChan {
if err := cfg.doPostProcessing(yf); err != nil {
return err
}
}
return nil
}