1 files changed, 152 insertions, 0 deletions
diff --git a/waflib/extras/cabal.py b/waflib/extras/cabal.py
new file mode 100644
index 0000000..e10a0d1
--- /dev/null
+++ b/waflib/extras/cabal.py
@@ -0,0 +1,152 @@
+#!/usr/bin/env python
+# encoding: utf-8
+# Anton Feldmann, 2012
+# "Base for cabal"
+
+from waflib import Task, Utils
+from waflib.TaskGen import extension
+from waflib.Utils import threading
+from shutil import rmtree
+
+lock = threading.Lock()
+registering = False
+
+def configure(self):
+    self.find_program('cabal', var='CABAL')
+    self.find_program('ghc-pkg', var='GHCPKG')
+    pkgconfd = self.bldnode.abspath() + '/package.conf.d'
+    self.env.PREFIX = self.bldnode.abspath() + '/dist'
+    self.env.PKGCONFD = pkgconfd
+    if self.root.find_node(pkgconfd + '/package.cache'):
+        self.msg('Using existing package database', pkgconfd, color='CYAN')
+    else:
+        pkgdir = self.root.find_dir(pkgconfd)
+        if pkgdir:
+            self.msg('Deleting corrupt package database', pkgdir.abspath(), color ='RED')
+            rmtree(pkgdir.abspath())
+            pkgdir = None
+
+        self.cmd_and_log(self.env.GHCPKG + ['init', pkgconfd])
+        self.msg('Created package database', pkgconfd, color = 'YELLOW' if pkgdir else 'GREEN')
+
+@extension('.cabal')
+def process_cabal(self, node):
+    out_dir_node = self.bld.root.find_dir(self.bld.out_dir)
+    package_node = node.change_ext('.package')
+    package_node = out_dir_node.find_or_declare(package_node.name)
+    build_node   = node.parent.get_bld()
+    build_path   = build_node.abspath()
+    config_node  = build_node.find_or_declare('setup-config')
+    inplace_node = build_node.find_or_declare('package.conf.inplace')
+
+    config_task = self.create_task('cabal_configure', node)
+    config_task.cwd = node.parent.abspath()
+    config_task.depends_on = getattr(self, 'depends_on', '')
+    config_task.build_path = build_path
+    config_task.set_outputs(config_node)
+
+    build_task = self.create_task('cabal_build', config_node)
+    build_task.cwd = node.parent.abspath()
+    build_task.build_path = build_path
+    build_task.set_outputs(inplace_node)
+
+    copy_task = self.create_task('cabal_copy', inplace_node)
+    copy_task.cwd = node.parent.abspath()
+    copy_task.depends_on = getattr(self, 'depends_on', '')
+    copy_task.build_path = build_path
+
+    last_task = copy_task
+    task_list = [config_task, build_task, copy_task]
+
+    if (getattr(self, 'register', False)):
+        register_task = self.create_task('cabal_register', inplace_node)
+        register_task.cwd = node.parent.abspath()
+        register_task.set_run_after(copy_task)
+        register_task.build_path = build_path
+
+        pkgreg_task = self.create_task('ghcpkg_register', inplace_node)
+        pkgreg_task.cwd = node.parent.abspath()
+        pkgreg_task.set_run_after(register_task)
+        pkgreg_task.build_path = build_path
+
+        last_task = pkgreg_task
+        task_list += [register_task, pkgreg_task]
+
+    touch_task = self.create_task('cabal_touch', inplace_node)
+    touch_task.set_run_after(last_task)
+    touch_task.set_outputs(package_node)
+    touch_task.build_path = build_path
+
+    task_list += [touch_task]
+
+    return task_list
+
+def get_all_src_deps(node):
+    hs_deps = node.ant_glob('**/*.hs')
+    hsc_deps = node.ant_glob('**/*.hsc')
+    lhs_deps = node.ant_glob('**/*.lhs')
+    c_deps = node.ant_glob('**/*.c')
+    cpp_deps = node.ant_glob('**/*.cpp')
+    proto_deps = node.ant_glob('**/*.proto')
+    return sum([hs_deps, hsc_deps, lhs_deps, c_deps, cpp_deps, proto_deps], [])
+
+class Cabal(Task.Task):
+    def scan(self):
+        return (get_all_src_deps(self.generator.path), ())
+
+class cabal_configure(Cabal):
+    run_str = '${CABAL} configure -v0 --prefix=${PREFIX} --global --user --package-db=${PKGCONFD} --builddir=${tsk.build_path}'
+    shell = True
+
+    def scan(self):
+        out_node = self.generator.bld.root.find_dir(self.generator.bld.out_dir)
+        deps = [out_node.find_or_declare(dep).change_ext('.package') for dep in Utils.to_list(self.depends_on)]
+        return (deps, ())
+
+class cabal_build(Cabal):
+    run_str = '${CABAL} build -v1 --builddir=${tsk.build_path}/'
+    shell = True
+
+class cabal_copy(Cabal):
+    run_str = '${CABAL} copy -v0 --builddir=${tsk.build_path}'
+    shell = True
+
+class cabal_register(Cabal):
+    run_str = '${CABAL} register -v0 --gen-pkg-config=${tsk.build_path}/pkg.config --builddir=${tsk.build_path}'
+    shell = True
+
+class ghcpkg_register(Cabal):
+    run_str = '${GHCPKG} update -v0 --global --user --package-conf=${PKGCONFD} ${tsk.build_path}/pkg.config'
+    shell = True
+
+    def runnable_status(self):
+        global lock, registering
+
+        val = False 
+        lock.acquire()
+        val = registering
+        lock.release()
+
+        if val:
+            return Task.ASK_LATER
+
+        ret = Task.Task.runnable_status(self)
+        if ret == Task.RUN_ME:
+            lock.acquire()
+            registering = True
+            lock.release()
+
+        return ret
+
+    def post_run(self):
+        global lock, registering
+
+        lock.acquire()
+        registering = False
+        lock.release()
+
+        return Task.Task.post_run(self)
+
+class cabal_touch(Cabal):
+    run_str = 'touch ${TGT}'
+