Commit Graph

6 Commits

Author SHA1 Message Date
Dan Carley d883b76070 command/fmt: Test non-default options
To ensure that these are passed over to `fmtcmd` correctly.
2016-03-07 15:07:15 +00:00
Dan Carley 79e2753e41 command/fmt: Disable list/write when using STDIN
These options don't make sense when passing STDIN. `-write` will raise an
error because there is no file to write to. `-list` will always say
`<standard input>`. So disable whenever using STDIN, making the command
much simpler:

    cat main.tf | terraform fmt -
2016-03-07 15:07:15 +00:00
Dan Carley e9128769b5 command/fmt: Accept input from STDIN
So that you can do automatic formatting from an editor. You probably want to
disable the `-write` and `-list` options so that you just get the
re-formatted content, e.g.

    cat main.tf | terraform fmt -write=false -list=false -

I've added a non-exported field called `input` so that we can override this
for the tests. If not specified, like in `commands.go`, then it will default
to `os.Stdin` which works on the command line.
2016-03-07 15:07:15 +00:00
Dan Carley 1b967e612f command/fmt: Accept optional directory argument
So that you can operate on files in a directory other than your current
working directory.
2016-03-07 15:07:14 +00:00
Dan Carley c753390399 command/fmt: Default write and list to true
The most common usage usage will be enabling the `-write` and `-list`
options so that files are updated in place and a list of any modified files
is printed. This matches the default behaviour of `go fmt` (not `gofmt`). So
enable these options by default.

This does mean that you will have to explicitly disable these if you want to
generate valid patches, e.g. `terraform fmt -diff -write=false -list=false`
2016-03-07 15:07:14 +00:00
Dan Carley cc41c7cfa0 command/fmt: Add new fmt command
This uses the `fmtcmd` package which has recently been merged into HCL. Per
the usage text, this rewrites Terraform config files to their canonical
formatting and style.

Some notes about the implementation for this initial commit:

- all of the fmtcmd options are exposed as CLI flags
- it operates on all files that have a `.tf` suffix
- it currently only operates on the working directory and doesn't accept a
  directory argument, but I'll extend this in subsequent commits
- output is proxied through `cli.UiWriter` so that we write in the same way
  as other commands and we can capture the output during tests
- the test uses a very simple fixture just to ensure that it is working
  correctly end-to-end; the fmtcmd package has more exhaustive tests
- we have to write the fixture to a file in a temporary directory because it
  will be modified and for this reason it was easier to define the fixture
  contents as a raw string
2016-03-07 15:07:04 +00:00