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
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
# Hacking Guide
## Overview
This guide contains instructions for building artifacts contained in this repository.
### Go
This spec includes several Go packages, and a command line tool considered to be a reference implementation of the OCI image specification.
Prerequisites:
* Go >=1.5
* make
The following make targets are relevant for any work involving the Go packages.
### Linting
The included Go source code is being examined for any linting violations not included in the standard Go compiler. Linting is done using [gometalinter](https://github.com/alecthomas/gometalinter).
Invocation:
```
$ make lint
```
### Tests
This target executes all Go based tests.
Invocation:
```
$ make test
$ make validate-examples
```
### OCI image tool
This target builds the `oci-image-tool` binary.
Invocation:
```
$ make oci-image-tool
```
### Virtual schema http/FileSystem
The `oci-image-tool` uses a virtual [http/FileSystem](https://golang.org/pkg/net/http/#FileSystem) to load the JSON schema files for validating OCI images and/or manifests. The virtual file system is generated using the `esc` tool and compiled into the `oci-image-tool` binary so the JSON schema files don't have to be distributed along with the binary.
Whenever changes are being done in any of the `schema/*.json` files, one must refresh the generated virtual file system. Otherwise schema changes will not be visible inside the `oci-image-tool`.
Prerequisites:
* [esc](https://github.com/mjibson/esc)
Invocation:
```
$ make schema-fs
```
### JSON schema formatting
This target auto-formats all JSON files in the `schema` directory using the `jq` tool.
Prerequisites:
* [jq](https://stedolan.github.io/jq/) >=1.5
Invocation:
```
$ make fmt
```
### OCI image specification PDF/HTML documentation files
This target generates a PDF/HTML version of the OCI image specification.
Prerequisites:
* [Docker](https://www.docker.com/)
Invocation:
```
$ make docs
```
### License header check
This target checks if the source code includes necessary headers.
Invocation:
```
$ make check-license
```
### Update vendored dependencies
This target updates all vendored dependencies to their newest available versions. The `glide` tools is being used for the actual management and `glide-vc` tool is being used for stripping down the vendor directory size.
Prerequisites:
* [glide](https://github.com/Masterminds/glide)
* [glide-vc](https://github.com/sgotti/glide-vc)
Invocation:
```
$ make update-deps
```
### Clean build artifacts
This target cleans all generated/compiled artifacts.
Invocation:
```
$ make clean
```
### Create PNG images from dot files
This target generates PNG image files from DOT source files in the `img` directory.
Prerequisites:
* [graphviz](http://www.graphviz.org/)
Invocation:
```
$ make img/media-types.png
```
|
