Add support for unnamed projects

Sometimes (e.g., in bpkg configuration) we don't have a project name.
In fact, it is not really a project; it can never be referenced in an
import directive.

So we now have a notion of an unnamed project. Such a project should
still have the 'project' variable set first thing in bootstrap.build
but its value should be empty.

Note that we can still amalgamate such projects just liked named ones.

6 files changed, 15 insertions, 0 deletions

diff --git a/tests/amalgam/unnamed/build/bootstrap.build b/tests/amalgam/unnamed/build/bootstrap.build
new file mode 100644
index 0000000..30065f4
--- /dev/null
+++ b/tests/amalgam/unnamed/build/bootstrap.build
@@ -0,0 +1,3 @@
+project = amalgam-unnamed
+amalgamation = # Disabled.
+using config
diff --git a/tests/amalgam/unnamed/buildfile b/tests/amalgam/unnamed/buildfile
new file mode 100644
index 0000000..5aa12c3
--- /dev/null
+++ b/tests/amalgam/unnamed/buildfile
@@ -0,0 +1,3 @@
+.: sub/
+include sub/
+print $subprojects
diff --git a/tests/amalgam/unnamed/sub/build/bootstrap.build b/tests/amalgam/unnamed/sub/build/bootstrap.build
new file mode 100644
index 0000000..ce3735a
--- /dev/null
+++ b/tests/amalgam/unnamed/sub/build/bootstrap.build
@@ -0,0 +1,2 @@
+project =
+using config
diff --git a/tests/amalgam/unnamed/sub/buildfile b/tests/amalgam/unnamed/sub/buildfile
new file mode 100644
index 0000000..8717375
--- /dev/null
+++ b/tests/amalgam/unnamed/sub/buildfile
@@ -0,0 +1,2 @@
+./:
+print "'$project'"
diff --git a/tests/amalgam/unnamed/test.out b/tests/amalgam/unnamed/test.out
new file mode 100644
index 0000000..1738349
--- /dev/null
+++ b/tests/amalgam/unnamed/test.out
@@ -0,0 +1,2 @@
+''
+sub/=sub/
diff --git a/tests/amalgam/unnamed/test.sh b/tests/amalgam/unnamed/test.sh
new file mode 100755
index 0000000..b898b3c
--- /dev/null
+++ b/tests/amalgam/unnamed/test.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+valgrind -q b -q | diff -u test.out -