Revert "Don't include directory names in archives."

This reverts commit 184420.
Investigating the bot failures.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184421 91177308-0d34-0410-b5e6-96231b3b80d8

test/Archive/directory.ll

@@ -1,8 +1,2 @@
 ;RUN: not llvm-ar r %T/test.a . 2>&1 | FileCheck %s
 ;CHECK: . Is a directory
-
-;RUN: rm -f %T/test.a
-;RUN: llvm-ar r %T/test.a %s
-;RUN: llvm-ar t %T/test.a | FileCheck -check-prefix=MEMBERS %s
-;MEMBERS-NOT: /
-;MEMBERS: directory.ll

tools/llvm-ar/Archive.cpp

@@ -97,8 +97,15 @@ bool ArchiveMember::replaceWith(StringRef newFile, std::string* ErrMsg) {
   else
     flags &= ~StringTableFlag;
 
+  // If it has a slash then it has a path
+  bool hasSlash = path.find('/') != std::string::npos;
+  if (hasSlash)
+    flags |= HasPathFlag;
+  else
+    flags &= ~HasPathFlag;
+
   // If it has a slash or its over 15 chars then its a long filename format
-  if (path.length() > 15)
+  if (hasSlash || path.length() > 15)
     flags |= HasLongFilenameFlag;
   else
     flags &= ~HasLongFilenameFlag;

tools/llvm-ar/Archive.h

@@ -52,8 +52,9 @@ class ArchiveMember : public ilist_node<ArchiveMember> {
       SVR4SymbolTableFlag = 1,     ///< Member is a SVR4 symbol table
       BSD4SymbolTableFlag = 2,     ///< Member is a BSD4 symbol table
       BitcodeFlag         = 4,     ///< Member is bitcode
-      HasLongFilenameFlag = 8,     ///< Member uses the long filename syntax
+      HasPathFlag         = 8,     ///< Member has a full or partial path
-      StringTableFlag     = 16     ///< Member is an ar(1) format string table
+      HasLongFilenameFlag = 16,    ///< Member uses the long filename syntax
+      StringTableFlag     = 32     ///< Member is an ar(1) format string table
     };
 
   /// @}
@@ -124,6 +125,10 @@ class ArchiveMember : public ilist_node<ArchiveMember> {
     /// @brief Determine if this member is a bitcode file.
     bool isBitcode() const { return flags&BitcodeFlag; }
 
+    /// @returns true iff the file name contains a path (directory) component.
+    /// @brief Determine if the member has a path
+    bool hasPath() const { return flags&HasPathFlag; }
+
     /// Long filenames are an artifact of the ar(1) file format which allows
     /// up to sixteen characters in its header and doesn't allow a path
     /// separator character (/). To avoid this, a "long format" member name is

tools/llvm-ar/ArchiveWriter.cpp

@@ -98,7 +98,13 @@ Archive::fillHeader(const ArchiveMember &mbr, ArchiveMemberHeader& hdr,
   sprintf(buffer,"%-12u", unsigned(secondsSinceEpoch));
   memcpy(hdr.date,buffer,12);
 
-  std::string mbrPath = sys::path::filename(mbr.getPath());
+  // Get rid of trailing blanks in the name
+  std::string mbrPath = mbr.getPath().str();
+  size_t mbrLen = mbrPath.length();
+  while (mbrLen > 0 && mbrPath[mbrLen-1] == ' ') {
+    mbrPath.erase(mbrLen-1,1);
+    mbrLen--;
+  }
 
   // Set the name field in one of its various flavors.
   bool writeLongName = false;
@@ -159,8 +165,8 @@ bool Archive::addFileBefore(StringRef filePath, iterator where,
   ArchiveMember* mbr = new ArchiveMember(this);
 
   mbr->data = 0;
-  mbr->path = filePath;
+  mbr->path = filePath.str();
-  sys::PathWithStatus PWS(filePath);
+  sys::PathWithStatus PWS(mbr->path);
   const sys::FileStatus *FSInfo = PWS.getFileStatus(false, ErrMsg);
   if (!FSInfo) {
     delete mbr;
@@ -173,7 +179,10 @@ bool Archive::addFileBefore(StringRef filePath, iterator where,
   mbr->Size = FSInfo->getSize();
 
   unsigned flags = 0;
-  if (sys::path::filename(filePath).size() > 15)
+  bool hasSlash = filePath.str().find('/') != std::string::npos;
+  if (hasSlash)
+    flags |= ArchiveMember::HasPathFlag;
+  if (hasSlash || filePath.str().length() > 15)
     flags |= ArchiveMember::HasLongFilenameFlag;
 
   sys::fs::file_magic type;

tools/llvm-ar/llvm-ar.cpp

@@ -399,6 +399,14 @@ doExtract(std::string* ErrMsg) {
     if (Paths.empty() ||
         (std::find(Paths.begin(), Paths.end(), I->getPath()) != Paths.end())) {
 
+      // Make sure the intervening directories are created
+      if (I->hasPath()) {
+        sys::Path dirs(I->getPath());
+        dirs.eraseComponent();
+        if (dirs.createDirectoryOnDisk(/*create_parents=*/true, ErrMsg))
+          return true;
+      }
+
       // Open up a file stream for writing
       std::ios::openmode io_mode = std::ios::out | std::ios::trunc |
                                    std::ios::binary;