1 files changed, 88 insertions, 0 deletions
diff --git a/vendor/clap-3.2.20/examples/tutorial_builder/04_04_custom.rs b/vendor/clap-3.2.20/examples/tutorial_builder/04_04_custom.rs
new file mode 100644
index 000000000..fb40b2fc4
--- /dev/null
+++ b/vendor/clap-3.2.20/examples/tutorial_builder/04_04_custom.rs
@@ -0,0 +1,88 @@
+use std::path::PathBuf;
+
+use clap::{arg, command, value_parser, ArgAction, ErrorKind};
+
+fn main() {
+    // Create application like normal
+    let mut cmd = command!() // requires `cargo` feature
+        // Add the version arguments
+        .arg(arg!(--"set-ver" <VER> "set version manually").required(false))
+        .arg(arg!(--major         "auto inc major").action(ArgAction::SetTrue))
+        .arg(arg!(--minor         "auto inc minor").action(ArgAction::SetTrue))
+        .arg(arg!(--patch         "auto inc patch").action(ArgAction::SetTrue))
+        // Arguments can also be added to a group individually, these two arguments
+        // are part of the "input" group which is not required
+        .arg(arg!([INPUT_FILE] "some regular input").value_parser(value_parser!(PathBuf)))
+        .arg(
+            arg!(--"spec-in" <SPEC_IN> "some special input argument")
+                .required(false)
+                .value_parser(value_parser!(PathBuf)),
+        )
+        // Now let's assume we have a -c [config] argument which requires one of
+        // (but **not** both) the "input" arguments
+        .arg(
+            arg!(config: -c <CONFIG>)
+                .required(false)
+                .value_parser(value_parser!(PathBuf)),
+        );
+    let matches = cmd.get_matches_mut();
+
+    // Let's assume the old version 1.2.3
+    let mut major = 1;
+    let mut minor = 2;
+    let mut patch = 3;
+
+    // See if --set-ver was used to set the version manually
+    let version = if let Some(ver) = matches.get_one::<String>("set-ver") {
+        if matches.get_flag("major") || matches.get_flag("minor") || matches.get_flag("patch") {
+            cmd.error(
+                ErrorKind::ArgumentConflict,
+                "Can't do relative and absolute version change",
+            )
+            .exit();
+        }
+        ver.to_string()
+    } else {
+        // Increment the one requested (in a real program, we'd reset the lower numbers)
+        let (maj, min, pat) = (
+            matches.get_flag("major"),
+            matches.get_flag("minor"),
+            matches.get_flag("patch"),
+        );
+        match (maj, min, pat) {
+            (true, false, false) => major += 1,
+            (false, true, false) => minor += 1,
+            (false, false, true) => patch += 1,
+            _ => {
+                cmd.error(
+                    ErrorKind::ArgumentConflict,
+                    "Can only modify one version field",
+                )
+                .exit();
+            }
+        };
+        format!("{}.{}.{}", major, minor, patch)
+    };
+
+    println!("Version: {}", version);
+
+    // Check for usage of -c
+    if matches.contains_id("config") {
+        let input = matches
+            .get_one::<PathBuf>("INPUT_FILE")
+            .or_else(|| matches.get_one::<PathBuf>("spec-in"))
+            .unwrap_or_else(|| {
+                cmd.error(
+                    ErrorKind::MissingRequiredArgument,
+                    "INPUT_FILE or --spec-in is required when using --config",
+                )
+                .exit()
+            })
+            .display();
+        println!(
+            "Doing work using input {} and config {}",
+            input,
+            matches.get_one::<PathBuf>("config").unwrap().display()
+        );
+    }
+}