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Add documentation for extend task.
2017-09-20, Eric Fritz
a4b424d543a1
Add documentation for extend task.
/*
* Convey
* Copyright 2016-2017 Gary Kramlich <grim@reaperworld.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package
docker
import
(
"github.com/aphistic/gomol"
"bitbucket.org/rw_grim/convey/environment"
"bitbucket.org/rw_grim/convey/state"
"bitbucket.org/rw_grim/convey/tasks"
"bitbucket.org/rw_grim/convey/yaml"
)
type
Pull
struct
{
Image
string
`yaml:"image"`
Images
yaml
.
StringOrSlice
`yaml:"images"`
}
const
pullTemplate
=
`pull {{.image}}`
func
(
p
*
Pull
)
Execute
(
name
string
,
logger
*
gomol
.
LogAdapter
,
env
[]
string
,
st
*
state
.
State
)
error
{
fullEnv
:=
environment
.
Merge
(
env
,
st
.
Environment
)
for
_
,
image
:=
range
p
.
Images
{
params
:=
map
[
string
]
interface
{}{
"image"
:
environment
.
Mapper
(
image
,
fullEnv
),
}
if
err
:=
Docker
(
name
,
pullTemplate
,
params
,
st
);
err
!=
nil
{
return
err
}
}
return
nil
}
func
(
p
*
Pull
)
New
()
tasks
.
Task
{
return
&
Pull
{}
}
func
(
p
*
Pull
)
Valid
()
error
{
if
p
.
Image
!=
""
{
p
.
Images
=
append
([]
string
{
p
.
Image
},
p
.
Images
...
)
}
if
len
(
p
.
Images
)
==
0
{
return
errNoImages
}
return
nil
}