canic_cli/cli/
help.rs

1//! Module: canic_cli::cli::help
2//!
3//! Responsibility: render the CLI catalog and route help/version requests.
4//! Does not own: command execution, command-specific help text, or global option forwarding.
5//! Boundary: defines the top-level command catalog shared by help and dispatch.
6
7use crate::cli::globals::{DISPATCH_ARGS, environment_arg, icp_arg};
8use clap::{Arg, ColorChoice, Command};
9use std::ffi::OsString;
10
11const TOP_LEVEL_HELP_TEMPLATE: &str = "Canic Operator CLI v{version}\n{about-with-newline}\n{usage-heading} {usage}\n\n{before-help}\x1b[1mOptions:\x1b[0m\n{options}{after-help}\n";
12const COLOR_RESET: &str = "\x1b[0m";
13const COLOR_HEADING: &str = "\x1b[1m";
14const COLOR_COMMAND: &str = "\x1b[38;5;109m";
15const COLOR_TIP: &str = "\x1b[38;5;245m";
16
17/// One top-level command shown in help and accepted by dispatch.
18
19#[derive(Clone, Copy, Debug, Eq, PartialEq)]
20pub(super) struct CommandSpec {
21    pub(super) name: &'static str,
22    about: &'static str,
23}
24
25pub(super) const COMMAND_SPECS: &[CommandSpec] = &[
26    CommandSpec {
27        name: "admission",
28        about: "Plan, apply, and inspect Fleet ingress admission",
29    },
30    CommandSpec {
31        name: "app",
32        about: "Manage Canic source apps and roles",
33    },
34    CommandSpec {
35        name: "auth",
36        about: "Inspect delegated-auth operation state",
37    },
38    CommandSpec {
39        name: "backup",
40        about: "Create, inspect, and verify backups",
41    },
42    CommandSpec {
43        name: "blob-storage",
44        about: "Inspect and manage blob-storage billing",
45    },
46    CommandSpec {
47        name: "build",
48        about: "Build Canic App and infrastructure artifacts",
49    },
50    CommandSpec {
51        name: "cycles",
52        about: "Inspect and transfer cycles for current Fleets",
53    },
54    CommandSpec {
55        name: "diagnostic",
56        about: "Look up one compact Canic diagnostic code",
57    },
58    CommandSpec {
59        name: "evidence",
60        about: "Evaluate stable evidence envelopes",
61    },
62    CommandSpec {
63        name: "fleet",
64        about: "Converge one Fleet from current desired state",
65    },
66    CommandSpec {
67        name: "info",
68        about: "Inspect one terminal current Fleet",
69    },
70    CommandSpec {
71        name: "inspect",
72        about: "Inspect one current Fleet canister runtime",
73    },
74    CommandSpec {
75        name: "medic",
76        about: "Diagnose workspace and current-Fleet readiness",
77    },
78    CommandSpec {
79        name: "network",
80        about: "Enroll canonical network trust identities",
81    },
82    CommandSpec {
83        name: "replica",
84        about: "Manage the local ICP replica",
85    },
86    CommandSpec {
87        name: "restore",
88        about: "Plan or run snapshot restores",
89    },
90    CommandSpec {
91        name: "scaffold",
92        about: "Scaffold Canic source roles",
93    },
94    CommandSpec {
95        name: "state",
96        about: "Audit declared Canic state metadata",
97    },
98    CommandSpec {
99        name: "status",
100        about: "Show quick local workspace status",
101    },
102    CommandSpec {
103        name: "token",
104        about: "Wrap ICP token balance and transfer commands",
105    },
106    CommandSpec {
107        name: "toolchain",
108        about: "Install checksum-authoritative release tools",
109    },
110];
111
112fn is_help_arg(arg: &OsString) -> bool {
113    arg.to_str()
114        .is_some_and(|arg| matches!(arg, "--help" | "-h"))
115}
116
117fn is_version_arg(arg: &OsString) -> bool {
118    arg.to_str()
119        .is_some_and(|arg| matches!(arg, "--version" | "-V"))
120}
121
122/// Return whether the first CLI argument requests help.
123pub fn first_arg_is_help(args: &[OsString]) -> bool {
124    args.first().is_some_and(is_help_arg)
125}
126
127fn first_arg_is_version(args: &[OsString]) -> bool {
128    args.first().is_some_and(is_version_arg)
129}
130
131/// Print help or version text when the first CLI argument requests it.
132///
133/// Returns `true` when the caller should stop command execution.
134pub fn print_help_or_version(
135    args: &[OsString],
136    usage: impl FnOnce() -> String,
137    version_text: &str,
138) -> bool {
139    if first_arg_is_help(args) {
140        println!("{}", usage());
141        return true;
142    }
143    if first_arg_is_version(args) {
144        println!("{version_text}");
145        return true;
146    }
147    false
148}
149
150/// Print help for an exact nested command before parsing its required operands.
151pub fn print_nested_help(args: &[OsString], mut command: Command) -> bool {
152    let mut path = command
153        .get_bin_name()
154        .unwrap_or_else(|| command.get_name())
155        .to_string();
156    for arg in args {
157        if is_help_arg(arg) {
158            println!("{}", command.bin_name(path).render_help());
159            return true;
160        }
161        let Some(child) = command
162            .get_subcommands()
163            .find(|child| Some(child.get_name()) == arg.to_str())
164            .cloned()
165        else {
166            return false;
167        };
168        path.push(' ');
169        path.push_str(child.get_name());
170        command = child;
171    }
172    false
173}
174
175#[must_use]
176/// Build the top-level Clap command used for public help rendering.
177pub fn top_level_command() -> Command {
178    let command = Command::new("canic")
179        .version(env!("CARGO_PKG_VERSION"))
180        .about("Operator CLI for current Canic Apps and Fleets")
181        .color(ColorChoice::Always)
182        .subcommand_required(true)
183        .arg(icp_arg())
184        .arg(environment_arg())
185        .subcommand_help_heading("Commands")
186        .help_template(TOP_LEVEL_HELP_TEMPLATE)
187        .before_help(format!(
188            "{}Commands:{}\n{}",
189            COLOR_HEADING,
190            COLOR_RESET,
191            command_section(COMMAND_SPECS).join("\n")
192        ))
193        .after_help(format!(
194            "\n{}Tip:{} Run {} for command-specific help.",
195            COLOR_TIP,
196            COLOR_RESET,
197            color(COLOR_COMMAND, "`canic <command> --help`")
198        ));
199
200    COMMAND_SPECS.iter().fold(command, |command, spec| {
201        command.subcommand(
202            Command::new(spec.name)
203                .about(spec.about)
204                .disable_help_flag(true)
205                .disable_version_flag(true)
206                .arg(
207                    Arg::new(DISPATCH_ARGS)
208                        .num_args(0..)
209                        .allow_hyphen_values(true)
210                        .trailing_var_arg(true)
211                        .value_parser(clap::value_parser!(OsString))
212                        .hide(true),
213                ),
214        )
215    })
216}
217
218/// Render Canic's custom colorized top-level usage text.
219#[cfg(test)]
220pub fn usage() -> String {
221    let help = top_level_command().render_help();
222    help.ansi().to_string()
223}
224
225fn command_section(specs: &[CommandSpec]) -> Vec<String> {
226    specs
227        .iter()
228        .map(|spec| {
229            let command = format!("{:<12}", spec.name);
230            format!("  {} {}", color(COLOR_COMMAND, &command), spec.about)
231        })
232        .collect()
233}
234
235fn color(code: &str, text: &str) -> String {
236    format!("{code}{text}{COLOR_RESET}")
237}
238
239// -----------------------------------------------------------------------------
240// Tests
241
242#[cfg(test)]
243mod tests {
244    use super::*;
245
246    // Ensure top-level usage keeps the intended help colors.
247    #[test]
248    fn usage_contains_help_colors() {
249        let text = usage();
250
251        assert!(text.contains(COLOR_HEADING));
252        assert!(text.contains(COLOR_COMMAND));
253    }
254
255    #[test]
256    fn first_arg_help_and_version_detection_accepts_flags() {
257        assert!(first_arg_is_help(&[OsString::from("--help")]));
258        assert!(first_arg_is_help(&[OsString::from("-h")]));
259        assert!(first_arg_is_version(&[OsString::from("--version")]));
260        assert!(first_arg_is_version(&[OsString::from("-V")]));
261    }
262}
canic_cli/cli/help.rs

canic_cli/cli/
help.rs
