Cmake build: Creating a define for a header file found

[lyx.git] / src / VCBackend.cpp

diff --git a/src/VCBackend.cpp b/src/VCBackend.cpp
index a6ce1c36f9554c816473fe596a5a45fdb6341138..8d26df2a6eacf02f651161d5c3b6930cba9e8e63 100644 (file)
--- a/src/VCBackend.cpp
+++ b/src/VCBackend.cpp
@@ -2112,12 +2112,99 @@ bool GIT::undoLastEnabled()
 }
 
 
-string GIT::revisionInfo(LyXVC::RevisionInfo const /*info*/)
+string GIT::revisionInfo(LyXVC::RevisionInfo const info)
 {
+       if (info == LyXVC::Tree) {
+               if (rev_tree_cache_.empty())
+                       if (!getTreeRevisionInfo())
+                               rev_tree_cache_ = "?";
+               if (rev_tree_cache_ == "?")
+                       return string();
+
+               return rev_tree_cache_;
+       }
+
+       // fill the rest of the attributes for a single file
+       if (rev_file_cache_.empty())
+               if (!getFileRevisionInfo())
+                       rev_file_cache_ = "?";
+
+       switch (info) {
+               case LyXVC::File:
+                       if (rev_file_cache_ == "?")
+                               return string();
+                       return rev_file_cache_;
+               case LyXVC::Author:
+                       return rev_author_cache_;
+               case LyXVC::Date:
+                       return rev_date_cache_;
+               case LyXVC::Time:
+                       return rev_time_cache_;
+               default: ;
+
+       }
+
        return string();
 }
 
 
+bool GIT::getFileRevisionInfo()
+{
+       FileName tmpf = FileName::tempName("lyxvcout");
+       if (tmpf.empty()) {
+               LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
+               return false;
+       }
+
+       doVCCommand("git log -n 1 --pretty=format:%H%n%an%n%ai " + quoteName(onlyFileName(owner_->absFileName()))
+                   + " > " + quoteName(tmpf.toFilesystemEncoding()),
+                   FileName(owner_->filePath()));
+
+       if (tmpf.empty())
+               return false;
+
+       ifstream ifs(tmpf.toFilesystemEncoding().c_str());
+
+       if (ifs)
+               getline(ifs, rev_file_cache_);
+       if (ifs)
+               getline(ifs, rev_author_cache_);
+       if (ifs) {
+               string line;
+               getline(ifs, line);
+               rev_time_cache_ = split(line, rev_date_cache_, ' ');
+       }
+
+       ifs.close();
+       tmpf.removeFile();
+       return !rev_file_cache_.empty();
+}
+
+
+bool GIT::getTreeRevisionInfo()
+{
+       FileName tmpf = FileName::tempName("lyxvcout");
+       if (tmpf.empty()) {
+               LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
+               return false;
+       }
+
+       doVCCommand("git log -n 1 --pretty=format:%H . > " + quoteName(tmpf.toFilesystemEncoding()),
+                   FileName(owner_->filePath()));
+
+       if (tmpf.empty())
+               return false;
+
+       // only first line in case something bad happens.
+       ifstream ifs(tmpf.toFilesystemEncoding().c_str());
+       getline(ifs, rev_tree_cache_);
+       ifs.close();
+       tmpf.removeFile();
+
+       return !rev_tree_cache_.empty();
+}
+
+
 void GIT::getLog(FileName const & tmpf)
 {
        doVCCommand("git log " + quoteName(onlyFileName(owner_->absFileName()))
@@ -2126,15 +2213,50 @@ void GIT::getLog(FileName const & tmpf)
 }
 
 
-bool GIT::prepareFileRevision(string const & /*revis*/, string & /*f*/)
+//at this moment we don't accept revision SHA, but just number of revision steps back
+//GUI and infrastucture needs to be changed first
+bool GIT::prepareFileRevision(string const & revis, string & f)
 {
-       return false;
+       // anything positive means we got hash, not "0" or minus revision
+       int rev = 1;
+
+       // hash is rarely number and should be long
+       if (isStrInt(revis) && revis.length()<20)
+               rev = convert<int>(revis);
+
+       // revision and filename
+       string pointer;
+
+       // go back for "minus" revisions
+       if (rev <= 0)
+               pointer = "HEAD~" + convert<string>(-rev);
+       // normal hash
+       else
+               pointer = revis;
+
+       pointer += ":";
+
+       FileName tmpf = FileName::tempName("lyxvcrev_" + revis + "_");
+       if (tmpf.empty()) {
+               LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
+               return false;
+       }
+
+       doVCCommand("git show " + pointer + "./"
+                     + quoteName(onlyFileName(owner_->absFileName()))
+                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
+               FileName(owner_->filePath()));
+       if (tmpf.isFileEmpty())
+               return false;
+
+       f = tmpf.absFileName();
+       return true;
 }
 
 
 bool GIT::prepareFileRevisionEnabled()
 {
-       return false;
+       return true;
 }