Support for “shadow copying”, which is just replicating a directory tree with hardlinks.

3 files changed, 38 insertions, 10 deletions

diff --git a/bockbuild.py b/bockbuild.py
index 7a58c3f..953c1cf 100755
--- a/bockbuild.py
+++ b/bockbuild.py
@@ -73,20 +73,20 @@ class Bockbuild:
         self.resources = set([os.path.realpath(
             os.path.join(self.root, 'packages'))]) # list of paths on where to look for packages, patches, etc.
 
-        self.state_root = self.root # root path for all storage; artifacts, build I/O, cache, storage and output
+        config.state_root = self.root # root path for all storage; artifacts, build I/O, cache, storage and output
         config.protected_git_repos.append (self.root)
         config.absolute_root = os.path.commonprefix([self.root, self.execution_root])
 
-        self.build_root = os.path.join(self.state_root, 'builds')
-        self.staged_prefix = os.path.join(self.state_root, 'stage')
-        self.toolchain_root = os.path.join(self.state_root, 'toolchain')
-        self.artifact_root = os.path.join(self.state_root, 'artifacts')
-        self.package_root = os.path.join(self.state_root, 'distribution')
-        self.scratch = os.path.join(self.state_root, 'scratch')
-        self.logs = os.path.join(self.state_root, 'logs')
-        self.env_file = os.path.join(self.state_root, 'last-successful-build.env')
+        self.build_root = os.path.join(config.state_root, 'builds')
+        self.staged_prefix = os.path.join(config.state_root, 'stage')
+        self.toolchain_root = os.path.join(config.state_root, 'toolchain')
+        self.artifact_root = os.path.join(config.state_root, 'artifacts')
+        self.package_root = os.path.join(config.state_root, 'distribution')
+        self.scratch = os.path.join(config.state_root, 'scratch')
+        self.logs = os.path.join(config.state_root, 'logs')
+        self.env_file = os.path.join(config.state_root, 'last-successful-build.env')
         self.source_cache = os.getenv('BOCKBUILD_SOURCE_CACHE') or os.path.realpath(
-            os.path.join(self.state_root, 'cache'))
+            os.path.join(config.state_root, 'cache'))
         self.cpu_count = get_cpu_count()
         self.host = get_host()
         self.uname = backtick('uname -a')
diff --git a/bockbuild/package.py b/bockbuild/package.py
index b024330..e2d25a3 100644
--- a/bockbuild/package.py
+++ b/bockbuild/package.py
@@ -774,6 +774,33 @@ class Package:
                     else:
                         warn("lipo: 32-bit version of file %s not found" % file)
 
+    #creates a deep hardlink copy of a directory
+    def shadow_copy (self, source, dest):
+        if os.path.commonprefix  ([source, config.state_root]) == source:
+            print 'this repo includes state dir'
+        if os.path.exists(dest):
+            error ('Destination directory must not exist')
+
+        stateroot_parent = os.path.dirname (config.state_root)
+        stateroot_name = os.path.basename (config.state_root)
+        stateroot_found = False
+
+        for root, subdirs, filelist in os.walk (source):
+            relpath = os.path.relpath(root, source) # e.g. 'lib/mystuff'
+            destpath = os.path.join(dest, relpath)
+            os.makedirs(destpath)
+            #print relpath
+            if not stateroot_found and root == stateroot_parent:
+                print len(subdirs)
+                subdirs [:] = [dir for dir in subdirs if dir != stateroot_name]
+                print len(subdirs)
+                stateroot_found = True
+            for file in filelist:
+                fullpath = os.path.join (root, file)
+                os.link (fullpath, os.path.join (destpath, file))
+
+        finish(exit_codes.SUCCESS)
+
     def copy_side_by_side(self, src_dir, dest_dir, bin_subdir, suffix, orig_suffix=None):
         def add_suffix(filename, sfx):
             fileparts = filename.split('.', 1)
diff --git a/bockbuild/util/util.py b/bockbuild/util/util.py
index 6f44259..e1d9cf5 100644
--- a/bockbuild/util/util.py
+++ b/bockbuild/util/util.py
@@ -42,6 +42,7 @@ class config:
     verbose = False
     protected_git_repos = [] # we do not allow modifying behavior on our profile repo or bockbuild repo.
     absolute_root = None # there is no file resolution beneath this path. Displayed paths are shortened by omitting this segment.
+    state_root = None
     exit_code = exit_codes.NOTSET
 
 class CommandException (Exception):  # shell command failure