~/rust/samplecli$ cargo run
Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Running `target/debug/samplecli`
No file specified.
Is verbosity specified?: false
~/rust/samplecli$ cargo run -- input.txt
Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Running `target/debug/samplecli input.txt`
File specified: input.txt
Is verbosity specified?: false
~/rust/samplecli$ cargo run -- -v input.txt
Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Running `target/debug/samplecli -v input.txt`
File specified: input.txt
Is verbosity specified?: true
~/rust/samplecli$ cargo run -- -h
Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Running `target/debug/samplecli -h`
My RPM program 1.0.0
Your name
Super awesome sample RPM calculator
USAGE:
samplecli [OPTIONS] [FILE]
ARGS:
<FILE>
OPTIONS:
-h, --help Print help information
-v, --verbose
-V, --version Print version information
~/rust/samplecli$ cargo run -- -d
Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Running `target/debug/samplecli -d`
error: Found argument '-d' which wasn't expected, or isn't valid in this context
If you tried to supply `-d` as a value rather than a flag, use `-- -d`
USAGE:
samplecli [OPTIONS] [FILE]
For more information try --help
~/rust/samplecli$ cargo run -- input.txt input2.txt
Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Running `target/debug/samplecli input.txt input2.txt`
error: Found argument 'input2.txt' which wasn't expected, or isn't valid in this context
USAGE:
samplecli [OPTIONS] [FILE]
For more information try --help