cmake: Teach cmake -E tar command, Zstandard compression

Fixes #18657

5 files changed, 19 insertions, 4 deletions

diff --git a/Source/cmArchiveWrite.cxx b/Source/cmArchiveWrite.cxx
index 177ba02..359d57a 100644
--- a/Source/cmArchiveWrite.cxx
+++ b/Source/cmArchiveWrite.cxx
@@ -137,6 +137,13 @@ cmArchiveWrite::cmArchiveWrite(std::ostream& os, Compress c,
         return;
       }
       break;
+    case CompressZstd:
+      if (archive_write_add_filter_zstd(this->Archive) != ARCHIVE_OK) {
+        this->Error = "archive_write_add_filter_zstd: ";
+        this->Error += cm_archive_error_string(this->Archive);
+        return;
+      }
+      break;
   }
 #if !defined(_WIN32) || defined(__CYGWIN__)
   if (archive_read_disk_set_standard_lookup(this->Disk) != ARCHIVE_OK) {
diff --git a/Source/cmArchiveWrite.h b/Source/cmArchiveWrite.h
index 1f23dae..9ea88d3 100644
--- a/Source/cmArchiveWrite.h
+++ b/Source/cmArchiveWrite.h
@@ -49,7 +49,8 @@ public:
     CompressGZip,
     CompressBZip2,
     CompressLZMA,
-    CompressXZ
+    CompressXZ,
+    CompressZstd
   };
 
   /** Construct with output stream to which to write archive.  */
diff --git a/Source/cmSystemTools.cxx b/Source/cmSystemTools.cxx
index 545e6c5..4ba04ed 100644
--- a/Source/cmSystemTools.cxx
+++ b/Source/cmSystemTools.cxx
@@ -1614,6 +1614,9 @@ bool cmSystemTools::CreateTar(const char* outFileName,
     case TarCompressXZ:
       compress = cmArchiveWrite::CompressXZ;
       break;
+    case TarCompressZstd:
+      compress = cmArchiveWrite::CompressZstd;
+      break;
     case TarCompressNone:
       compress = cmArchiveWrite::CompressNone;
       break;
diff --git a/Source/cmSystemTools.h b/Source/cmSystemTools.h
index d145d47..64d6d7a 100644
--- a/Source/cmSystemTools.h
+++ b/Source/cmSystemTools.h
@@ -451,6 +451,7 @@ public:
     TarCompressGZip,
     TarCompressBZip2,
     TarCompressXZ,
+    TarCompressZstd,
     TarCompressNone
   };
 
diff --git a/Source/cmcmd.cxx b/Source/cmcmd.cxx
index 3c75957..e1b6f48 100644
--- a/Source/cmcmd.cxx
+++ b/Source/cmcmd.cxx
@@ -1043,11 +1043,17 @@ int cmcmd::ExecuteCMakeCommand(std::vector<std::string> const& args)
       std::vector<std::string> files;
       std::string mtime;
       std::string format;
+      cmSystemTools::cmTarCompression compress =
+        cmSystemTools::TarCompressNone;
+      int nCompress = 0;
       bool doing_options = true;
       for (auto const& arg : cmMakeRange(args).advance(4)) {
         if (doing_options && cmHasLiteralPrefix(arg, "--")) {
           if (arg == "--") {
             doing_options = false;
+          } else if (arg == "--zstd") {
+            compress = cmSystemTools::TarCompressZstd;
+            ++nCompress;
           } else if (cmHasLiteralPrefix(arg, "--mtime=")) {
             mtime = arg.substr(8);
           } else if (cmHasLiteralPrefix(arg, "--files-from=")) {
@@ -1075,10 +1081,7 @@ int cmcmd::ExecuteCMakeCommand(std::vector<std::string> const& args)
         }
       }
       cmSystemTools::cmTarAction action = cmSystemTools::TarActionNone;
-      cmSystemTools::cmTarCompression compress =
-        cmSystemTools::TarCompressNone;
       bool verbose = false;
-      int nCompress = 0;
 
       for (auto flag : flags) {
         switch (flag) {