(Windows 7, virtualbox)
With this in the packer template :
"vboxmanage": [
["modifyvm", "{{.Name}}", "--memory", "2048"],
["modifyvm", "{{.Name}}", "--cpus", "2"],
["sharedfolder", "add", "{{.Name}}", "--name", "Share", "--hostpath", "C:\Users\Michel", "--automount"]
],
the shared folder does not appear in the built guest, which has only the /vagrant shared folder. But the 'automount' more or less works, because there is an _empty_ /media/sf_Share/ .
The syntax is correct and the 'hostpath' is found : I checked that VB would complain in the opposite case. Also 'C:\Users\Michel' is a real name, not a link
AFAIK.
_md
This is more of a bug with Vagrant (I have an idea what it is) but I'll leave this here to think about.
OK
@badal Yesterday I was playing with this very same sharefolder stuff.
However, I am in Windows 8.1 pro and I get an error When I do S:\, it take is as an escape code and fail.
S:\packer_laptop>c:\packer\packer.exe build packer-vagrant-oracle65-install_crs_db.json
Failed to parse template: Error in line 28, char 90: invalid character 'p' in string escape code
["sharedfolder", "add", "{{.Name}}", "--name", "stagefiles", "--hostpath", "S:\packer_laptop\stagefiles","--automount"],
S:\packer_laptop>
I can use s:/
"vboxmanage": [
["modifyvm", "{{.Name}}", "--vram", "32"],
["modifyvm", "{{.Name}}", "--memory", "4096"] ,
["sharedfolder", "add", "{{.Name}}", "--name", "stagefiles", "--hostpath", "S:/packer_laptop/stagefiles", "--automount"],
Or, can be double \
"vboxmanage": [
["modifyvm", "{{.Name}}", "--vram", "32"],
["modifyvm", "{{.Name}}", "--memory", "4096"] ,
["sharedfolder", "add", "{{.Name}}", "--name", "stagefiles", "--hostpath", "S:\\packer_laptop\\stagefiles", "--automount"],
I did this, because when I see the logs, for the iso, it's escapped like url,
virtualbox: Downloading or copying: file:///S:%5Cpacker_laptop%5COracleLinux-R6-U5-Server-x86_64-dvd.iso
So that gave the idea to use \ or just use /
Alvaro.

@Alvaro : Yes you need // because it is read by Packer.
_md
There is a Vagrant issue tracking this and I don't think this belongs here any longer.