update basic commands

Author: mertcandav

src/compiler/basic-commands.md

@@ -1,17 +1,42 @@
 # Basic Commands
 The basics of compiler commands.
 
+## help
+Shows help about of commands.
+```
+$ julec help
+$ julec help <command>
+```
+
 ## build
-Compiles a program.
+The build command compiles the packages named by the import paths.
+
+The compile path must be the main package directory of the program.
+When compiling packages, build ignores files that end in `_test.jule`.
+The main package must have the entry point `main` function.
 ```
-$ julec build <args>
+$ julec build [arguments] <path>
 ```
 
-## help
-Shows help about of commands. 
+## test
+The test command compiles the packages named by the import paths for testing.
+
+The compile path must be the package directory of the program to be tested.
+When compiling packages for testing, it will include files that end in `_test.jule`.
+The package may have not the entry point `main` function, it will not be used.
+Test compilations uses implicitly generated entry point for testing.
+
+Read the [writing tests](/debugging/testing/writing-tests) section for more information.
 ```
-$ julec help
+$ julec test [arguments] <path>
+```
+
+## mod
+```
+$ julec mod <command>
 ```
+Module commands.\
+Read the [modules](/packages/modules/) section for more information.
 
 ## version
 Shows version of the JuleC.
@@ -26,22 +51,8 @@ See the command's help table for more information:
 $ julec tool
 ```
 
-## julenv
-Show information about native jule environment.
-```
-$ julec julenv
-```
-
-## test
-```
-$ julec test <compile-command>
-```
-Compiles for testing.\
-Read the [writing tests](/debugging/testing/writing-tests) section for more information.
-
-## mod
+## env
+Show information about jule environment.
 ```
-$ julec mod <command>
-```
-Module commands.\
-Read the [modules](/packages/modules/) section for more information.
+$ julec env
+```