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Use the HTTP Last-Modified http header as the mtime value for ADD cmd when present

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Closes #8331

Signed-off-by: Doug Davis <dug@us.ibm.com>
Upstream-commit: 0d41e6a758
Component: cli
This commit is contained in:
Doug Davis
2014-10-22 11:16:42 -07:00
committed by Tibor Vass
parent 3319e2c64a
commit 7beca7812a
1 changed files with 5 additions and 1 deletions
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6
components/cli/docs/sources/reference/builder.md
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@@ -376,7 +376,11 @@ destination container.
All new files and directories are created with a UID and GID of 0.
In the case where `<src>` is a remote file URL, the destination will
have permissions of 600.
have permissions of 600. If the remote file being retrieved has an HTTP
`Last-Modified` header, the timestamp from that header will be used
to set the `mtime` on the destination file. Then, like any other file
processed during an `ADD`, `mtime` will be included in the determination
of whether or not the file has changed and the cache should be updated.
> **Note**:
> If you build by passing a `Dockerfile` through STDIN (`docker