Defining a command without cmd or valid imports defined causes panic #50
Description
This should fail more gracefully with a helpful error message.
Example files:
version: v2
commands:
example:
usage: This doesn't have a command defined.version: v2
commands:
example:
usage: 'cmd' is misspelled as 'dmc'
dmc: echo "test"version: v2
commands:
example:
usage: This doesn't have an import where the file actually exists.
imports:
- file-not-exists.ymlversion: v2
commands:
example:
usage: This has 'imports' misspelled as 'import'
import:
- import-exists.ymlPanic Error
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x74918]
goroutine 1 [running]:
panic(0x17d220, 0xc4200120b0)
/usr/local/Cellar/go/1.7.3/libexec/src/runtime/panic.go:500 +0x1a1
github.com/ahoy-cli/ahoy/vendor/github.com/codegangsta/cli.Command.Run(0xc4200705a0, 0x6, 0x0, 0x0, 0x0, 0x0, 0x0, 0xc4200705c0, 0xf, 0x0, ...)
/private/tmp/ahoy-20161121-46993-73ob16/src/github.com/ahoy-cli/ahoy/vendor/github.com/codegangsta/cli/command.go:131 +0x798
github.com/ahoy-cli/ahoy/vendor/github.com/codegangsta/cli.(*App).Run(0xc42009e120, 0xc420084060, 0x2, 0x2, 0x0, 0x0)
/private/tmp/ahoy-20161121-46993-73ob16/src/github.com/ahoy-cli/ahoy/vendor/github.com/codegangsta/cli/app.go:175 +0xa35
main.main()
/private/tmp/ahoy-20161121-46993-73ob16/src/github.com/ahoy-cli/ahoy/ahoy.go:379 +0xea