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Used Rsync for reverting state.

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This commit is contained in:
Wouter den Breejen 2007-10-17 11:16:57 +00:00
parent 138973a6d5
commit 84d00db70b
5 changed files with 33 additions and 71 deletions
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92
src/libstore/store-state.cc
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@ -137,71 +137,32 @@ void revertToRevisionTxn(const Transaction & txn, const Path & statePath, const
for (Snapshots::iterator j = revisioned_paths.begin(); j != revisioned_paths.end(); ++j){
Path revertPathOrFile = (*j).first;
unsigned int epoch = (*j).second; //TODO !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
unsigned int epoch = (*j).second;
printMsg(lvlError, format("MAYBE '%1%''%2%'") % revertPathOrFile % epoch);
/*
//Look up the type from the drv with for the current snapshotted path
Path statePath_postfix = revertPathOrFile.substr(nixStoreState.length() + 1, revertPathOrFile.length() - nixStoreState.length());
statePath_postfix = statePath_postfix.substr(statePath_postfix.find_first_of("/") + 1, statePath_postfix.length());
if(statePath_postfix == "")
statePath_postfix = "/";
string type = stateOutputDirs.at(statePath_postfix).type;
if(type == "none")
if(epoch == 0) //Path was deleted so were done
continue;
//Now that were still here, we need to copy the state from the previous version back
Strings p_args;
p_args.push_back("-c"); //we use the shell to execute the cp command becuase the shell expands the '*'
string cpcommand = "cp"; //TODO USE RSYNC!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
*/
/*
if(revertPathOrFile.substr(revertPathOrFile.length() -1 , revertPathOrFile.length()) == "/"){ //is dir
string revert_to_path = revertPathOrFile.substr(0, revertPathOrFile.length() -1) + "@" + unsignedInt2String(epoch);
cpcommand += " -R " + revert_to_path + "/*";
//clean all contents of the folder first (so were sure the path is clean)
if(pathExists(revertPathOrFile))
deletePath(revertPathOrFile);
if(epoch == 0) //Path was deleted so were done
continue;
else //If path was not deleted in the previous version, we need to make sure it exists or cp will fail
ensureDirExists(revertPathOrFile);
//If the the dir has not contents then a cp ..../* will error since * cannot be expanded. So in this case were done and dont have to revert.
Strings p2_args;
p2_args.push_back("-A");
p2_args.push_back(revert_to_path + "/");
string output = runProgram("ls", true, p2_args);
if(output == "")
continue;
}
else{ //is file
cpcommand += " " + (revertPathOrFile + "@" + unsignedInt2String(epoch));
if(epoch == 0){
//delete file
if(FileExist(revertPathOrFile))
deletePath(revertPathOrFile); //we only delete if the cp doesnt overwrite it below
continue;
}
}
//Revert
printMsg(lvlError, format("Reverting '%1%@%2%'") % revertPathOrFile % unsignedInt2String(epoch));
printMsg(lvlError, format("Command: '%1%'") % cpcommand);
cpcommand += " " + revertPathOrFile;
p_args.push_back(cpcommand);
runProgram_AndPrintOutput("sh", true, p_args, "sh-cp");
*/
//Dir: Remove a slash at the end, we create /nix/state/...../cachedir@1234/
//File: Or create /nix/state/..../logfile.txt@1234
string revertPathOrFile_e;
if(revertPathOrFile.substr(revertPathOrFile.length() -1 , revertPathOrFile.length()) == "/"){
revertPathOrFile_e = revertPathOrFile.substr(0 , revertPathOrFile.length() -1) + "@" + unsignedInt2String(epoch) + "/";
//TODO IF IS FILE: REMOVE THE FILE
}
else{
revertPathOrFile_e = revertPathOrFile + "@" + unsignedInt2String(epoch);
//TODO IF IS DIR: REMOVE THE DIR
}
rsyncPaths(revertPathOrFile_e, revertPathOrFile, false);
}
//*** Now also revert state _references_ to the specific revision (the revision is already converted to a timestamp here)
/*
//Query the references of the old revision (already converted to a timestamp)
PathSet state_references;
queryXReferencesTxn(txn, statePath, state_references, true, 0, timestamp);
@ -216,7 +177,6 @@ void revertToRevisionTxn(const Transaction & txn, const Path & statePath, const
printMsg(lvlError, format("Reverted state of '%1%' to the latest revision") % statePath); //TODO lookup the number
else
printMsg(lvlError, format("Reverted state of '%1%' to revision '%2%'") % statePath % revision_arg);
*/
}
}
@ -779,7 +739,7 @@ bool queryAvailableStateRevisions(Database & nixDB, const Transaction & txn, Tab
return true;
}
void rsyncPaths(const Path & from, const Path & to) //TODO bool shellexpansion, bool failure for nix-env
void rsyncPaths(const Path & from, const Path & to, const bool addSlashes) //TODO bool shellexpansion, bool failure for nix-env
{
//TODO Could be a symlink (to a non-existing dir)
/*
@ -788,14 +748,16 @@ void rsyncPaths(const Path & from, const Path & to) //TODO bool shellexpansion,
if(!DirectoryExist(to))
throw Error(format("Path `%1%' doenst exist ...") % to);
*/
//We add a slash / to the end to ensure the contents is copyed
Path from2 = from;
Path to2 = to;
if(from2[from2.length() - 1] != '/')
from2 = from2 + "/";
if(to2[to2.length() - 1] != '/')
to2 = to2 + "/";
if(addSlashes){
//We add a slash / to the end to ensure the contents is copyed
if(from2[from2.length() - 1] != '/')
from2 = from2 + "/";
if(to2[to2.length() - 1] != '/')
to2 = to2 + "/";
}
printMsg(lvlError, format("Rsync from: '%1%' to: '%2%'") % from2 % to2);