Add the 'clean' tool.

It removes built files either by rule or target or everything.

1 files changed, 190 insertions, 0 deletions

diff --git a/src/clean.cc b/src/clean.cc
new file mode 100644
index 0000000..2cdb27d
--- /dev/null
+++ b/src/clean.cc
@@ -0,0 +1,190 @@
+// Copyright 2011 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "clean.h"
+
+#include "graph.h"
+#include "ninja.h"
+#include "util.h"
+#include "build.h"
+
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <assert.h>
+
+Cleaner::Cleaner(State* state, const BuildConfig& config)
+  : state_(state)
+  , verbose_(config.verbosity == BuildConfig::VERBOSE || config.dry_run)
+  , dry_run_(config.dry_run)
+  , removed_()
+{
+}
+
+bool Cleaner::RemoveFile(const string& path) {
+  if (remove(path.c_str()) < 0) {
+    switch (errno) {
+      case ENOENT:
+        return false;
+      default:
+        Error("remove(%s): %s", path.c_str(), strerror(errno));
+        return false;
+    }
+  } else {
+    return true;
+  }
+}
+
+bool Cleaner::FileExists(const string& path) {
+  struct stat st;
+  if (stat(path.c_str(), &st) < 0) {
+    switch (errno) {
+      case ENOENT:
+        return false;
+      default:
+        Error("stat(%s): %s", path.c_str(), strerror(errno));
+        return false;
+    }
+  } else {
+    return true;
+  }
+}
+
+void Cleaner::Report(const string& path) {
+  if (verbose_)
+    printf("Remove %s\n", path.c_str());
+}
+
+void Cleaner::Remove(const string& path) {
+  if (!IsAlreadyRemoved(path)) {
+    removed_.insert(path);
+    if (dry_run_) {
+      if (FileExists(path))
+        Report(path);
+    } else {
+      if (RemoveFile(path))
+        Report(path);
+    }
+  }
+}
+
+bool Cleaner::IsAlreadyRemoved(const string& path) {
+  set<string>::iterator i = removed_.find(path);
+  return (i != removed_.end());
+}
+
+void Cleaner::PrintHeader() {
+  printf("Cleaning...");
+  if (verbose_)
+    printf("\n");
+  else
+    printf(" ");
+}
+
+void Cleaner::PrintFooter() {
+  printf("%d files.\n", removed_.size());
+}
+
+void Cleaner::CleanAll() {
+  PrintHeader();
+  for (vector<Edge*>::iterator e = state_->edges_.begin();
+       e != state_->edges_.end();
+       ++e)
+    for (vector<Node*>::iterator out_node = (*e)->outputs_.begin();
+         out_node != (*e)->outputs_.end();
+         ++out_node)
+      Remove((*out_node)->file_->path_);
+  PrintFooter();
+}
+
+void Cleaner::DoCleanTarget(Node* target) {
+  if (target->in_edge_) {
+    Remove(target->file_->path_);
+    for (vector<Node*>::iterator n = target->in_edge_->inputs_.begin();
+         n != target->in_edge_->inputs_.end();
+         ++n) {
+      DoCleanTarget(*n);
+    }
+  }
+}
+
+void Cleaner::CleanTarget(Node* target) {
+  assert(target);
+
+  PrintHeader();
+  DoCleanTarget(target);
+  PrintFooter();
+}
+
+int Cleaner::CleanTargets(int target_count, char* targets[]) {
+  int status = 0;
+  PrintHeader();
+  for (int i = 0; i < target_count; ++i) {
+    const char* target_name = targets[i];
+    Node* target = state_->LookupNode(target_name);
+    if (target) {
+      if (verbose_)
+        printf("Target %s\n", target_name);
+      DoCleanTarget(target);
+    } else {
+      Error("unknown target '%s'", target_name);
+      status = 1;
+    }
+  }
+  PrintFooter();
+  return status;
+}
+
+void Cleaner::DoCleanRule(const Rule* rule) {
+  assert(rule);
+
+  for (vector<Edge*>::iterator e = state_->edges_.begin();
+       e != state_->edges_.end();
+       ++e)
+    if ((*e)->rule_->name_ == rule->name_)
+      for (vector<Node*>::iterator out_node = (*e)->outputs_.begin();
+           out_node != (*e)->outputs_.end();
+           ++out_node)
+        Remove((*out_node)->file_->path_);
+}
+
+void Cleaner::CleanRule(const Rule* rule) {
+  assert(rule);
+
+  PrintHeader();
+  DoCleanRule(rule);
+  PrintFooter();
+}
+
+int Cleaner::CleanRules(int rule_count, char* rules[]) {
+  assert(rules);
+
+  int status = 0;
+  PrintHeader();
+  for (int i = 0; i < rule_count; ++i) {
+    const char* rule_name = rules[i];
+    const Rule* rule = state_->LookupRule(rule_name);
+    if (rule) {
+      if (verbose_)
+        printf("Rule %s\n", rule_name);
+      DoCleanRule(rule);
+    } else {
+      Error("unknown rule '%s'", rule_name);
+      status = 1;
+    }
+  }
+  PrintFooter();
+  return status;
+}