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author | Robin Krahl <robin.krahl@ireas.org> | 2020-01-07 11:18:04 +0000 |
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committer | Daniel Mueller <deso@posteo.net> | 2020-01-08 09:20:25 -0800 |
commit | 5e20a29b4fdc8a2d442d1093681b396dcb4b816b (patch) | |
tree | 55ab083fa8999d2ccbb5e921c1ffe52560dca152 /structopt/examples/rename_all.rs | |
parent | 203e691f46d591a2cc8acdfd850fa9f5b0fb8a98 (diff) | |
download | nitrocli-5e20a29b4fdc8a2d442d1093681b396dcb4b816b.tar.gz nitrocli-5e20a29b4fdc8a2d442d1093681b396dcb4b816b.tar.bz2 |
Add structopt dependency in version 0.3.7
This patch series replaces argparse with structopt in the argument
handling code. As a first step, we need structopt as a dependency.
Import subrepo structopt/:structopt at efbdda4753592e27bc430fb01f7b9650b2f3174d
Import subrepo bitflags/:bitflags at 30668016aca6bd3b02c766e8347e0b4080d4c296
Import subrepo clap/:clap at 784524f7eb193e35f81082cc69454c8c21b948f7
Import subrepo heck/:heck at 093d56fbf001e1506e56dbfa38631d99b1066df1
Import subrepo proc-macro-error/:proc-macro-error at 6c4cfe79a622c5de8ae68557993542be46eacae2
Import subrepo proc-macro2/:proc-macro2 at d5d48eddca4566e5438e8a2cbed4a74e049544de
Import subrepo quote/:quote at 727436c6c137b20f0f34dde5d8fda2679b9747ad
Import subrepo rustversion/:rustversion at 0c5663313516263059ce9059ef81fc7a1cf655ca
Import subrepo syn-mid/:syn-mid at 5d3d85414a9e6674e1857ec22a87b96e04a6851a
Import subrepo syn/:syn at e87c27e87f6f4ef8919d0372bdb056d53ef0d8f3
Import subrepo textwrap/:textwrap at abcd618beae3f74841032aa5b53c1086b0a57ca2
Import subrepo unicode-segmentation/:unicode-segmentation at 637c9874c4fe0c205ff27787faf150a40295c6c3
Import subrepo unicode-width/:unicode-width at 3033826f8bf05e82724140a981d5941e48fce393
Import subrepo unicode-xid/:unicode-xid at 4baae9fffb156ba229665b972a9cd5991787ceb7
Diffstat (limited to 'structopt/examples/rename_all.rs')
-rw-r--r-- | structopt/examples/rename_all.rs | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/structopt/examples/rename_all.rs b/structopt/examples/rename_all.rs new file mode 100644 index 0000000..35f3c4f --- /dev/null +++ b/structopt/examples/rename_all.rs @@ -0,0 +1,74 @@ +//! Example on how the `rename_all` parameter works. +//! +//! `rename_all` can be used to override the casing style used during argument +//! generation. By default the `kebab-case` style will be used but there are a wide +//! variety of other styles available. +//! +//! ## Supported styles overview: +//! +//! - **Camel Case**: Indicate word boundaries with uppercase letter, excluding +//! the first word. +//! - **Kebab Case**: Keep all letters lowercase and indicate word boundaries +//! with hyphens. +//! - **Pascal Case**: Indicate word boundaries with uppercase letter, +//! including the first word. +//! - **Screaming Snake Case**: Keep all letters uppercase and indicate word +//! boundaries with underscores. +//! - **Snake Case**: Keep all letters lowercase and indicate word boundaries +//! with underscores. +//! - **Verbatim**: Use the original attribute name defined in the code. + +use structopt::StructOpt; + +#[derive(StructOpt, Debug)] +#[structopt(name = "rename_all", rename_all = "screaming_snake_case")] +enum Opt { + // This subcommand will be named `FIRST_COMMAND`. As the command doesn't + // override the initial casing style, ... + /// A screaming loud first command. Only use if necessary. + FirstCommand { + // this flag will be available as `--FOO` and `-F`. + /// This flag will even scream louder. + #[structopt(long, short)] + foo: bool, + }, + + // As we override the casing style for this variant the related subcommand + // will be named `SecondCommand`. + /// Not nearly as loud as the first command. + #[structopt(rename_all = "pascal_case")] + SecondCommand { + // We can also override it again on a single field. + /// Nice quiet flag. No one is annoyed. + #[structopt(rename_all = "snake_case", long)] + bar_option: bool, + + // Renaming will not be propagated into subcommand flagged enums. If + // a non default casing style is required it must be defined on the + // enum itself. + #[structopt(subcommand)] + cmds: Subcommands, + + // or flattened structs. + #[structopt(flatten)] + options: BonusOptions, + }, +} + +#[derive(StructOpt, Debug)] +enum Subcommands { + // This one will be available as `first-subcommand`. + FirstSubcommand, +} + +#[derive(StructOpt, Debug)] +struct BonusOptions { + // And this one will be available as `baz-option`. + #[structopt(long)] + baz_option: bool, +} + +fn main() { + let opt = Opt::from_args(); + println!("{:?}", opt); +} |