simple inc plugin implementation

crates/nu_plugin_inc/src/nu/mod.rs

@@ -0,0 +1,47 @@
+use crate::inc::SemVerAction;
+use crate::Inc;
+use nu_plugin::{plugin::PluginError, Plugin};
+use nu_protocol::ast::Call;
+use nu_protocol::{Signature, Span, Value};
+
+impl Plugin for Inc {
+    fn signature(&self) -> Vec<Signature> {
+        vec![Signature::build("inc")
+            .desc("Increment a value or version. Optionally use the column of a table.")
+            .switch(
+                "major",
+                "increment the major version (eg 1.2.1 -> 2.0.0)",
+                Some('M'),
+            )
+            .switch(
+                "minor",
+                "increment the minor version (eg 1.2.1 -> 1.3.0)",
+                Some('m'),
+            )
+            .switch(
+                "patch",
+                "increment the patch version (eg 1.2.1 -> 1.2.2)",
+                Some('p'),
+            )]
+    }
+
+    fn run(&mut self, name: &str, call: &Call, input: &Value) -> Result<Value, PluginError> {
+        if name != "inc" {
+            return Ok(Value::Nothing {
+                span: Span::unknown(),
+            });
+        }
+
+        if call.has_flag("major") {
+            self.for_semver(SemVerAction::Major);
+        }
+        if call.has_flag("minor") {
+            self.for_semver(SemVerAction::Minor);
+        }
+        if call.has_flag("patch") {
+            self.for_semver(SemVerAction::Patch);
+        }
+
+        self.inc(input)
+    }
+}