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website: document {{.Vars}} in execute_command example [GH-241]

This commit is contained in:
Mitchell Hashimoto 2013-08-03 13:40:31 -07:00
parent 46e49b745e
commit 46ec8f758b
1 changed files with 4 additions and 2 deletions
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6
website/source/docs/provisioners/shell.html.markdown
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@ -78,11 +78,13 @@ and has the password "packer" for sudo usage, then you'll likely want to
change `execute_command` to be: change `execute_command` to be:
``` ```
"echo 'packer' | sudo -S sh '{{ .Path }}'" "echo 'packer' | {{ .Vars }} sudo -E -S sh '{{ .Path }}'"
``` ```
The `-S` flag tells `sudo` to read the password from stdin, which in this The `-S` flag tells `sudo` to read the password from stdin, which in this
case is being piped in with the value of "packer". case is being piped in with the value of "packer". The `-E` flag tells `sudo`
to preserve the environment, allowing our environmental variables to work
within the script.
By setting the `execute_command` to this, your script(s) can run with By setting the `execute_command` to this, your script(s) can run with
root privileges without worrying about password prompts. root privileges without worrying about password prompts.