Reimplement define as dynamic derivation rather than alias

New syntax:

define cli: file

The rationale is we need to be able to assign the file extension (using
type/pattern-specific variables). And if it is an alias, we will assign
it to the original target type.

Note that we could still support aliases if we need to. Will need to
bring back the id member in target_type that would normally point to
itself but for an alias would point to the origin.

2 files changed, 26 insertions, 12 deletions

diff --git a/tests/define/buildfile b/tests/define/buildfile
index d3b9fc4..55b9e92 100644
--- a/tests/define/buildfile
+++ b/tests/define/buildfile
@@ -1,16 +1,14 @@
-#define          # expected name
-#define foo      # expected =
-#define foo=     # expected name
-#define foo=bar  # unknown target type
+#define           # expected name
+#define foo       # expected :
+#define foo:      # expected name
+#define foo: bar  # unknown target type
 
-define foo=file
-foo{FOO}:        # verify name is foo{FOO} and not file{FOO} with --verbose 6 
+define foo: file
+foo{FOO}:         # verify name is foo{FOO} and not file{FOO} with --verbose 6 
 
-#define foo=dir  # already define in this scope
+#define foo: dir  # already define in this scope
 
-define bar=foo
-bar{FOO}:       # verify name is foo{FOO} and not bar{FOO} with --verbose 6
-bar{BAR}:       # verify name is bar{BAR}
+define bar: foo
+bar{BAR}:         # verify name is bar{FOO} with --verbose 6
 
-define folder=dir
-folder{./}:   # verify prints "folder{} is up to date"
+./:
diff --git a/tests/define/buildfile.alias b/tests/define/buildfile.alias
new file mode 100644
index 0000000..d3b9fc4
--- /dev/null
+++ b/tests/define/buildfile.alias
@@ -0,0 +1,16 @@
+#define          # expected name
+#define foo      # expected =
+#define foo=     # expected name
+#define foo=bar  # unknown target type
+
+define foo=file
+foo{FOO}:        # verify name is foo{FOO} and not file{FOO} with --verbose 6 
+
+#define foo=dir  # already define in this scope
+
+define bar=foo
+bar{FOO}:       # verify name is foo{FOO} and not bar{FOO} with --verbose 6
+bar{BAR}:       # verify name is bar{BAR}
+
+define folder=dir
+folder{./}:   # verify prints "folder{} is up to date"