Archive action (#133)

Author: grouma

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.4.8
+
+* Add utilities for Dart archives. 
+
 ## 0.4.7
 
 * Add support for build time --define arguments to codegen binaries

dart/build_rules/common/_archive.bzl

@@ -0,0 +1,34 @@
+"""Custom internal impl of create_archive."""
+
+def create_archive(ctx, srcs, label):
+  """Creates an archive for the supplied srcs.
+
+  Args:
+    ctx: The target context.
+    srcs: the srcs for the current target
+    label: the label for the current target
+  Returns:
+    - A tar file which contains the supplied srcs.
+
+  """
+  commands = []
+  for src in srcs:
+    commands += ["mkdir -p $(dirname $ARCHIVE_DIR/%s)" % src.short_path]
+    commands += ["cp -L %s $ARCHIVE_DIR/%s" % (src.path, src.short_path)]
+  tmp_file = ctx.new_file(label.name + ".archive_inputs")
+  ctx.file_action(output=tmp_file, content="\n".join(commands))
+  tar_file = ctx.new_file(label.name + ".dart_archive.tar")
+  ctx.action(
+      inputs=srcs +[tmp_file],
+      outputs=[tar_file],
+      mnemonic="DartArchive",
+      command="\n".join([
+          "export WORKSPACE=${PWD}",
+          "export ARCHIVE_DIR=$(mktemp -d)",
+          "bash %s" % tmp_file.path,
+          "cd $ARCHIVE_DIR",
+          "tar -chzf temp_tar.tar *",
+          "cd $WORKSPACE",
+          "cp $ARCHIVE_DIR/temp_tar.tar %s" % tar_file.path]),
+      progress_message="Creating Dart archive")
+  return tar_file

dart/build_rules/common/context.bzl

@@ -18,6 +18,10 @@ load(
     "//dart/build_rules/common:path.bzl",
     "filter_files",
 )
+load(
+    "//dart/build_rules/common:_archive.bzl",
+    "create_archive",
+)
 
 def collect_dart_context(dart_ctx, transitive = True, include_self = True):
   """Collect direct or transitive deps in a map, merging contexts as needed."""
@@ -83,8 +87,14 @@ def make_dart_context(
   dart_srcs = filter_files(dart_filetypes, srcs)
   data = set(data or [])
   deps = deps or []
-  transitive_srcs, transitive_dart_srcs, transitive_data, transitive_deps = (
-      _collect_files(srcs, dart_srcs, data, deps))
+  archive_srcs = list(srcs + data)
+
+  archive = None
+  if archive_srcs:
+    archive = create_archive(ctx, archive_srcs, ctx.label)
+
+  transitive_srcs, transitive_dart_srcs, transitive_data, transitive_deps, transitive_archives = (
+      _collect_files(srcs, dart_srcs, data, deps, archive))
   strong_analysis = None
   strong_summary = None
   if enable_summaries:
@@ -113,23 +123,29 @@ def make_dart_context(
       transitive_dart_srcs = transitive_dart_srcs,
       transitive_data = transitive_data,
       transitive_deps = transitive_deps,
+      archive=archive,
+      transitive_archives=transitive_archives
   )
 
-def _collect_files(srcs, dart_srcs, data, deps):
+def _collect_files(srcs, dart_srcs, data, deps, archive):
   transitive_srcs = set()
   transitive_dart_srcs = set()
   transitive_data = set()
   transitive_deps = {}
+  transitive_archives = set()
   for dep in deps:
     transitive_srcs += dep.dart.transitive_srcs
     transitive_dart_srcs += dep.dart.transitive_dart_srcs
     transitive_data += dep.dart.transitive_data
     transitive_deps += dep.dart.transitive_deps
     transitive_deps["%s" % dep.dart.label] = dep
+    transitive_archives += dep.dart.transitive_archives
   transitive_srcs += srcs
   transitive_dart_srcs += dart_srcs
   transitive_data += data
-  return (transitive_srcs, transitive_dart_srcs, transitive_data, transitive_deps)
+  if archive:
+    transitive_archives += [archive]
+  return (transitive_srcs, transitive_dart_srcs, transitive_data, transitive_deps, transitive_archives)
 
 def _merge_dart_context(dart_ctx1, dart_ctx2):
   """Merges dart contexts, or fails if they are incompatible."""