+doxygen (#447)

* add doxygen
* add flex and python on linux
* cleanup test

---------

Co-authored-by: Max Howell <mxcl@me.com>

projects/doxygen.nl/package.yml

@@ -0,0 +1,34 @@
+
+distributable:
+   url: https://github.com/doxygen/doxygen/archive/refs/tags/Release_{{version.major}}_{{version.minor}}_{{version.patch}}.tar.gz
+   strip-components: 1
+
+versions:
+  - 1.9.6 # FIXME: the versions are "Release_1_9_6" but no idea how I can parse this without regex
+
+build:
+  dependencies:
+    tea.xyz/gx/cc: c99
+    tea.xyz/gx/make: '*'
+    gnu.org/bison: ^3
+    cmake.org: ^3
+    github.com/westes/flex: 2
+    python.org: ^3
+  working-directory: build
+  script: |
+    cmake $ARGS -G "Unix Makefiles" ..
+    make --jobs {{ hw.concurrency }} 
+    make install
+  env:
+    ARGS:
+      - -DCMAKE_INSTALL_PREFIX="{{prefix}}"
+      - -DCMAKE_BUILD_TYPE=Release
+    
+
+provides:
+  - bin/doxygen
+
+test:
+  script: |
+    doxygen -g
+    doxygen Doxyfile

projects/github.com/westes/flex/package.yml

@@ -7,7 +7,8 @@ versions:
   strip: /^flex /
 
 dependencies:
-  gnu.org/m4: 1
+  gnu.org/gettext: ^0
+  gnu.org/m4: ^1
 
 build:
   dependencies: