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Implements --format option for docker history command by creating a formatter 

Signed-off-by: Jeremy Chambers <jeremy@thehipbot.com>

Adds to history documentation for --format

Signed-off-by: Jeremy Chambers <jeremy@thehipbot.com>

Adds MarshalJSON to historyContext for {{json .}} format

Signed-off-by: Jeremy Chambers <jeremy@thehipbot.com>

Adds back the --human option to history command

Signed-off-by: Jeremy Chambers <jeremy@thehipbot.com>

Cleans up formatter around --human option for history, Adds integration test for --format option of history

Signed-off-by: Jeremy Chambers <jeremy@thehipbot.com>

Adds test for history formatter checking full table results, Runs go fmt on touched files

Signed-off-by: Jeremy Chambers <jeremy@thehipbot.com>

Fixes lint errors in formatter/history

Signed-off-by: Jeremy Chambers <jeremy@thehipbot.com>

Runs go fmt on cli/command/formatter/history.go

Signed-off-by: Jeremy Chambers <jeremy@thehipbot.com>

sRemoves integration test for --format option of history

Merges Created and CreatedSince in docker history formatter, Updates docs and tests
This commit is contained in:
Jeremy Chambers 2017-02-12 13:22:01 -06:00 committed by Tibor Vass
parent 9e2467d474
commit aa124aee73
1 changed files with 44 additions and 4 deletions
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docs/reference/commandline/history.md
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@ -21,6 +21,7 @@ Usage: docker history [OPTIONS] IMAGE
Show the history of an image
Options:
--format string Pretty-print images using a Go template
--help Print usage
-H, --human Print sizes and dates in human readable format (default true)
--no-trunc Don't truncate output
@ -54,3 +55,42 @@ IMAGE CREATED CREATED BY
c69cab00d6ef 5 months ago /bin/sh -c #(nop) MAINTAINER Lokesh Mandvekar 0 B
511136ea3c5a 19 months ago 0 B Imported from -
```
### Format the output
The formatting option (`--format`) will pretty print history output
using a Go template.
Valid placeholders for the Go template are listed below:
| Placeholder | Description|
| ---- | ---- |
| `.ID` | Image ID |
| `.CreatedSince` | Elapsed time since the image was created if --human=true, otherwise timestamp of when image was created |
| `.CreatedAt` | Timestamp of when image was created |
| `.CreatedBy` | Command that was used to create the image |
| `.Size` | Image disk size |
| `.Comment` | Comment for image |
When using the `--format` option, the `history` command will either
output the data exactly as the template declares or, when using the
`table` directive, will include column headers as well.
The following example uses a template without headers and outputs the
`ID` and `CreatedSince` entries separated by a colon for all images:
```bash
{% raw %}
$ docker images --format "{{.ID}}: {{.Created}} ago"
cc1b61406712: 2 weeks ago
<missing>: 2 weeks ago
<missing>: 2 weeks ago
<missing>: 2 weeks ago
<missing>: 2 weeks ago
<missing>: 3 weeks ago
<missing>: 3 weeks ago
<missing>: 3 weeks ago
{% endraw %}
```