nitpm: install packages listed in package.ini by default

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/src/picnit.nit b/src/picnit.nit
index 5df3bcd..bac74eb 100644 (file)
--- a/src/picnit.nit
+++ b/src/picnit.nit
@@ -55,17 +55,50 @@ class CommandInstall
        super Command
 
        redef fun name do return "install"
-       redef fun usage do return "picnit install [package or git-repository]"
-       redef fun description do return "Install a package by its name or from a git-repository"
+       redef fun usage do return "picnit install [package0 [package1 ...]]"
+       redef fun description do return "Install packages by name, Git repository address or from the local package.ini"
 
        redef fun apply(args)
        do
-               if args.length != 1 then
-                       print_local_help
-                       exit 1
+               if args.not_empty then
+                       # Install each package
+                       for arg in args do
+                               # Parse each arg as an import string, with versions and commas
+                               install_packages arg
+                       end
+               else
+                       # Install packages from local package.ini
+                       var ini_path = "package.ini"
+                       if not ini_path.file_exists then
+                               print_error "Local `package.ini` not found."
+                               print_local_help
+                               exit 1
+                       end
+
+                       var ini = new ConfigTree(ini_path)
+                       var import_line = ini["package.import"]
+                       if import_line == null then
+                               print_error "The local `package.ini` declares no external dependencies."
+                               exit 0
+                               abort
+                       end
+
+                       install_packages import_line
                end
+       end
 
-               var package_id = args.first
+       # Install packages defined by the `import_line`
+       private fun install_packages(import_line: String)
+       do
+               var imports = import_line.parse_import
+               for name, ext_package in imports do
+                       install_package(ext_package.id, ext_package.version)
+               end
+       end
+
+       # Install the `package_id` at `version`
+       private fun install_package(package_id: String, version: nullable String)
+       do
                if package_id.is_package_name then
                        # Ask a centralized server
                        # TODO choose a future safe URL