Add build2 packaging support

.gitignore

@@ -1,4 +1,9 @@
-build/
+# Ignore CMake/build2 out-of-tree build artifacts under build/, but keep
+# the tracked build2 metadata files (build/bootstrap.build, build/root.build).
+build/*
+!build/bootstrap.build
+!build/root.build
+!build/export.build
 
 # Compiled Object files
 *.slo

README.md

@@ -107,6 +107,34 @@ target("your_target")
     add_packages("geo-utils-cpp")
 ```
 
+### build2 / bpkg / cppget
+
+> **Package name note:** in the build2 ecosystem (cppget.org) this library
+> follows the build2 `libfoo` convention and is published as **`libgeo-utils`**.
+> Everywhere else — GitHub project, CMake, vcpkg, Conan, xrepo — it is named
+> **`geo-utils-cpp`**. Both names refer to the same library, same headers, same
+> `#include <geo/...>` API.
+
+Add the dependency to your package's `manifest`:
+
+```
+depends: libgeo-utils ^1.0.1
+```
+
+And in the consuming `buildfile`:
+
+```
+import libs = libgeo-utils%lib{geo-utils}
+
+exe{hello}: cxx{hello} $libs
+```
+
+To install it into a build2 configuration directly:
+
+```sh
+bpkg build libgeo-utils
+```
+
 ### find_package
 
 ```cmake

build/bootstrap.build

@@ -0,0 +1,6 @@
+project = libgeo-utils
+
+using config
+using test
+using dist
+using install

build/root.build

@@ -0,0 +1,5 @@
+cxx.std = latest
+
+using cxx
+
+hxx{*}: extension = hpp

buildfile

@@ -0,0 +1 @@
+./: include/ doc{README.md LICENSE NOTICE CHANGELOG.md} manifest

include/buildfile

@@ -0,0 +1 @@
+./: geo/

include/geo/buildfile

@@ -0,0 +1,11 @@
+lib{geo-utils}: hxx{**}
+
+# Public include path: consumers do `#include <geo/...>`.
+lib{geo-utils}: cxx.export.poptions = "-I$out_root/include" "-I$src_root/include"
+
+# Install headers under <prefix>/include/geo/, preserving the detail/ subdir.
+hxx{*}:
+{
+  install         = include/geo/
+  install.subdirs = true
+}

manifest

@@ -0,0 +1,17 @@
+: 1
+name: libgeo-utils
+version: 1.0.1
+project: geo-utils-cpp
+language: c++
+summary: Header-only C++17 geographic geometry utilities
+license: Apache-2.0
+topics: geography, geometry, spherical, distance, header-only
+description-file: README.md
+description-type: text/markdown
+changes-file: CHANGELOG.md
+changes-type: text/markdown
+url: https://github.com/gistrec/geo-utils-cpp
+src-url: https://github.com/gistrec/geo-utils-cpp
+package-url: https://github.com/gistrec/geo-utils-cpp
+email: gistrec@gmail.com
+requires: c++17