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Diffstat (limited to 'build/rule.cxx')
| -rw-r--r-- | build/rule.cxx | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/build/rule.cxx b/build/rule.cxx new file mode 100644 index 0000000..fe4c4b2 --- /dev/null +++ b/build/rule.cxx @@ -0,0 +1,72 @@ +// file : build/rule.cxx -*- C++ -*- +// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC +// license : MIT; see accompanying LICENSE file + +#include <build/rule> + +#include <iostream> + +using namespace std; + +namespace build +{ + rule_map rules; + + // default_path_rule + // + recipe default_path_rule:: + match (target& t) const + { + // @@ TODO: + // + // - need to assign path somehow. Get (potentially several) + // extensions from target type? Maybe target type should + // generate a list of potential paths that we can try here. + // + + path_target& pt (dynamic_cast<path_target&> (t)); + + return pt.mtime () != timestamp_nonexistent ? &update : nullptr; + } + + target_state default_path_rule:: + update (target& t) + { + // Make sure the target is not older than any of its prerequisites. + // + path_target& pt (dynamic_cast<path_target&> (t)); + timestamp mt (pt.mtime ()); + + for (const target& p: t.prerequisites ()) + { + // If this is an mtime-based target, then simply compare timestamps. + // + if (auto mtp = dynamic_cast<const mtime_target*> (&p)) + { + if (mt < mtp->mtime ()) + { + cerr << "error: no rule to update target " << t << endl + << "info: prerequisite " << p << " is ahead of " << t << + " by " << (mtp->mtime () - mt) << endl; + + return target_state::failed; + } + } + else + { + // Otherwise we assume the prerequisite is newer if it was updated. + // + if (p.state () == target_state::updated) + { + cerr << "error: no rule to update target " << t << endl + << "info: prerequisite " << p << " is ahead of " << t << + " because it was updated" << endl; + + return target_state::failed; + } + } + } + + return target_state::uptodate; + } +} |