Go components no longer need main

Signed-off-by: itowlson <[email protected]>

content/spin/v3/ai-sentiment-analysis-api-tutorial.md

@@ -757,9 +757,6 @@ func performSentimentAnalysis(w http.ResponseWriter, r *http.Request, ps spinhtt
 		return
 	}
 }
-
-func main() {}
-
 ```
 
 {{ blockEnd }}

content/spin/v3/build.md

@@ -135,7 +135,7 @@ The build command calls TinyGo with the WASI backend and appropriate options:
 
 ```toml
 [component.hello.build]
-command = "tinygo build -target=wasip1 -gc=leaking -scheduler=none -buildmode=c-shared -no-debug -o main.wasm ."
+command = "tinygo build -target=wasip1 -gc=leaking -buildmode=c-shared -no-debug -o main.wasm ."
 ```
 
 {{ blockEnd }}

content/spin/v3/go-components.md

@@ -61,16 +61,14 @@ func init() {
   fmt.Fprintln(w, "Hello Fermyon!")
  })
 }
-
-func main() {}
 ```
 
 The Spin HTTP component (written in Go) can be built using the `tingygo` toolchain:
 
 <!-- @selectiveCpy -->
 
 ```bash
-$ tinygo build -target=wasip1 -gc=leaking -scheduler=none -buildmode=c-shared -no-debug -o main.wasm .
+$ tinygo build -target=wasip1 -gc=leaking -buildmode=c-shared -no-debug -o main.wasm .
 ```
 
 Once built, we can run our Spin HTTP component using the Spin up command:
@@ -141,16 +139,14 @@ func init() {
   }
  })
 }
-
-func main() {}
 ```
 
 The Outbound HTTP Request example above can be built using the `tingygo` toolchain:
 
 <!-- @selectiveCpy -->
 
 ```bash
-$ tinygo build -target=wasip1 -gc=leaking -scheduler=none -buildmode=c-shared -no-debug -o main.wasm .
+$ tinygo build -target=wasip1 -gc=leaking -buildmode=c-shared -no-debug -o main.wasm .
 ```
 
 Before we can execute this component, we need to add the
@@ -228,9 +224,6 @@ func init() {
   return nil
  })
 }
-
-// main function must be included for the compiler but is not executed.
-func main() {}
 ```
 
 The manifest for a Redis application must contain the address of the Redis instance. This is set at the application level:
@@ -255,7 +248,7 @@ component = "echo-message"
 [component.echo-message]
 source = "main.wasm"
 [component.echo-message.build]
-command = "tinygo build -target=wasip1 -gc=leaking -scheduler=none -buildmode=c-shared -no-debug -o main.wasm ."
+command = "tinygo build -target=wasip1 -gc=leaking -buildmode=c-shared -no-debug -o main.wasm ."
 ```
 
 The application will connect to `redis://localhost:6379`, and for every new message
@@ -351,8 +344,6 @@ func init() {
   }
  })
 }
-
-func main() {}
 ```
 
 As with all networking APIs, you must grant access to Redis hosts via the `allowed_outbound_hosts` field in the application manifest:

content/spin/v3/http-trigger.md

@@ -294,8 +294,6 @@ class IncomingHandler(http.IncomingHandler):
 
 In Go, you register the handler as a callback in your program's `init` function.  Call `spinhttp.Handle`, passing your handler as the sole argument.  Your handler takes a `http.Request` record, from the standard `net/http` package, and a `ResponseWriter` to construct the response.
 
-> The do-nothing `main` function is required by TinyGo but is not used; the action happens in the `init` function and handler callback.
-
 ```go
 package main
 
@@ -312,8 +310,6 @@ func init() {
                 fmt.Fprintln(w, "Hello Fermyon!")
         })
 }
-
-func main() {}
 ```
 
 > If you are moving between languages, note that in most other Spin SDKs, your handler _constructs and returns_ a response, but in Go, _Spin_ constructs a `ResponseWriter`, and you write to it; your handler does not return a value.

content/spin/v3/key-value-store-tutorial.md

@@ -398,9 +398,6 @@ func init() {
 		}
 	})
 }
-
-func main() {}
-
 ```
 
 {{ blockEnd }}

content/spin/v3/quickstart.md

@@ -624,7 +624,7 @@ component = "hello-go"
 source = "main.wasm"
 allowed_outbound_hosts = []
 [component.hello-go.build]
-command = "tinygo build -target=wasip1 -gc=leaking -scheduler=none -buildmode=c-shared -no-debug -o main.wasm ."
+command = "tinygo build -target=wasip1 -gc=leaking -buildmode=c-shared -no-debug -o main.wasm ."
 ```
 
 This represents a simple Spin HTTP application (triggered by an HTTP request).  It has:
@@ -635,8 +635,8 @@ This represents a simple Spin HTTP application (triggered by an HTTP request).
 [Learn more about the manifest here.](./writing-apps)
 
 Now let's have a look at the code. Below is the complete source
-code for a Spin HTTP component written in Go. Notice where the work is done.  The
-`main` function is empty (and Spin never calls it).  Instead, the `init` function
+code for a Spin HTTP component written in Go. Notice where the work is done.  Because this is a component
+rather than an application, there is no `main` function.  Instead, the `init` function
 sets up a callback, and passes that callback to `spinhttp.Handle` to register it as
 the handler for HTTP requests.  You can learn more about this structure
 in the [Go language guide](go-components).
@@ -657,8 +657,6 @@ func init() {
                 fmt.Fprintln(w, "Hello Fermyon!")
         })
 }
-
-func main() {}
 ```
 
 {{ blockEnd }}
@@ -822,7 +820,7 @@ You can always run this command manually; `spin build` is a shortcut.
 
 ```bash
 $ spin build
-Executing the build command for component hello-go: tinygo build -target=wasip1 -gc=leaking -scheduler=none -buildmode=c-shared -no-debug -o main.wasm .
+Executing the build command for component hello-go: tinygo build -target=wasip1 -gc=leaking -buildmode=c-shared -no-debug -o main.wasm .
 go: downloading github.com/fermyon/spin/sdk/go v0.10.0
 Finished building all Spin components
 ```
@@ -838,7 +836,7 @@ If you would like to know what build command Spin runs for a component, you can
 
 ```toml
 [component.hello-go.build]
-command = "tinygo build -target=wasip1 -gc=leaking -scheduler=none -buildmode=c-shared -no-debug -o main.wasm ."
+command = "tinygo build -target=wasip1 -gc=leaking -buildmode=c-shared -no-debug -o main.wasm ."
 ```
 
 You can always run this command manually; `spin build` is a shortcut to save you having to remember it.

content/spin/v3/rdbms-storage.md

@@ -194,8 +194,6 @@ func init() {
 		json.NewEncoder(w).Encode(pets)
 	})
 }
-
-func main() {}
 ```
 
 {{ blockEnd }}

content/spin/v3/redis-trigger.md

@@ -137,8 +137,6 @@ func init() {
 		return nil
 	})
 }
-
-func main() {}
 ```
 
 {{ blockEnd }}

content/spin/v3/sqlite-api-guide.md

@@ -224,8 +224,6 @@ func init() {
 		json.NewEncoder(w).Encode(todos)
 	})
 }
-
-func main() {}
 ```
 
 **General Notes**

content/spin/v3/variables.md

@@ -232,8 +232,6 @@ func init() {
 		fmt.Fprintln(w, "Used an API")
 	})
 }
-
-func main() {}
 ```
 
 {{ blockEnd }}