Add semver increment

src/plugins/inc.rs

@@ -1,18 +1,30 @@
 use indexmap::IndexMap;
 use nu::{
-    serve_plugin, Args, CommandConfig, Plugin, PositionalType, Primitive, ReturnSuccess,
+    serve_plugin, Args, CommandConfig, NamedType, Plugin, PositionalType, Primitive, ReturnSuccess,
     ReturnValue, ShellError, Spanned, SpannedItem, Value,
 };
 
 struct Inc {
     field: Option<String>,
+    major: bool,
+    minor: bool,
+    patch: bool,
 }
 impl Inc {
     fn new() -> Inc {
-        Inc { field: None }
+        Inc {
+            field: None,
+            major: false,
+            minor: false,
+            patch: false,
+        }
     }
 
-    fn inc(value: Spanned<Value>, field: &Option<String>) -> Result<Spanned<Value>, ShellError> {
+    fn inc(
+        &self,
+        value: Spanned<Value>,
+        field: &Option<String>,
+    ) -> Result<Spanned<Value>, ShellError> {
         match value.item {
             Value::Primitive(Primitive::Int(i)) => Ok(Value::int(i + 1).spanned(value.span)),
             Value::Primitive(Primitive::Bytes(b)) => {
@@ -24,6 +36,19 @@ impl Inc {
                         item: Value::string(format!("{}", i + 1)),
                         span: value.span,
                     })
+                } else if let Ok(mut ver) = semver::Version::parse(&s) {
+                    if self.major {
+                        ver.increment_major();
+                    } else if self.minor {
+                        ver.increment_minor();
+                    } else {
+                        self.patch;
+                        ver.increment_patch();
+                    }
+                    Ok(Spanned {
+                        item: Value::string(ver.to_string()),
+                        span: value.span,
+                    })
                 } else {
                     Err(ShellError::string("string could not be incremented"))
                 }
@@ -31,7 +56,7 @@ impl Inc {
             Value::Object(_) => match field {
                 Some(f) => {
                     let replacement = match value.item.get_data_by_path(value.span, f) {
-                        Some(result) => Inc::inc(result.map(|x| x.clone()), &None)?,
+                        Some(result) => self.inc(result.map(|x| x.clone()), &None)?,
                         None => {
                             return Err(ShellError::string("inc could not find field to replace"))
                         }
@@ -60,16 +85,31 @@ impl Inc {
 
 impl Plugin for Inc {
     fn config(&mut self) -> Result<CommandConfig, ShellError> {
+        let mut named = IndexMap::new();
+        named.insert("major".to_string(), NamedType::Switch);
+        named.insert("minor".to_string(), NamedType::Switch);
+        named.insert("patch".to_string(), NamedType::Switch);
+
         Ok(CommandConfig {
             name: "inc".to_string(),
             positional: vec![PositionalType::optional_any("Field")],
             is_filter: true,
             is_sink: false,
-            named: IndexMap::new(),
+            named,
             rest_positional: true,
         })
     }
     fn begin_filter(&mut self, args: Args) -> Result<(), ShellError> {
+        if args.has("major") {
+            self.major = true;
+        }
+        if args.has("minor") {
+            self.minor = true;
+        }
+        if args.has("patch") {
+            self.patch = true;
+        }
+
         if let Some(args) = args.positional {
             for arg in args {
                 match arg {
@@ -93,7 +133,7 @@ impl Plugin for Inc {
     }
 
     fn filter(&mut self, input: Spanned<Value>) -> Result<Vec<ReturnValue>, ShellError> {
-        Ok(vec![ReturnSuccess::value(Inc::inc(input, &self.field)?)])
+        Ok(vec![ReturnSuccess::value(self.inc(input, &self.field)?)])
     }
 }