* A GC setting `gc-keep-outputs' to specify whether output paths of

derivations should be kept.
This commit is contained in:
Eelco Dolstra 2005-02-01 22:07:48 +00:00
parent 2e6bf723e4
commit a37338815d
7 changed files with 102 additions and 7 deletions

View file

@ -7,5 +7,6 @@ AM_CXXFLAGS = \
-DNIX_DATA_DIR=\"$(datadir)\" \
-DNIX_STATE_DIR=\"$(localstatedir)/nix\" \
-DNIX_LOG_DIR=\"$(localstatedir)/log/nix\" \
-DNIX_CONF_DIR=\"$(sysconfdir)/nix\" \
-DNIX_VERSION=\"$(VERSION)\" \
-I.. ${aterm_include} -I../libutil -I../libstore

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@ -106,6 +106,7 @@ static void initAndRun(int argc, char * * argv)
nixLogDir = canonPath(getEnv("NIX_LOG_DIR", NIX_LOG_DIR));
nixStateDir = canonPath(getEnv("NIX_STATE_DIR", NIX_STATE_DIR));
nixDBPath = getEnv("NIX_DB_DIR", nixStateDir + "/db");
nixConfDir = canonPath(getEnv("NIX_CONF_DIR", NIX_CONF_DIR));
/* Check that the store directory and its parent are not
symlinks. */

View file

@ -213,14 +213,9 @@ static void readTempRoots(PathSet & tempRoots, FDs & fds)
lockFile(*fd, ltRead, true);
/* Read the entire file. */
struct stat st;
if (fstat(*fd, &st) == -1)
throw SysError(format("statting `%1%'") % path);
unsigned char buf[st.st_size]; /* !!! stack space */
readFull(*fd, buf, st.st_size);
string contents = readFile(*fd);
/* Extract the roots. */
string contents((char *) buf, st.st_size);
unsigned int pos = 0, end;
while ((end = contents.find((char) 0, pos)) != string::npos) {
@ -310,7 +305,9 @@ static Paths topoSort(const PathSet & paths)
void collectGarbage(GCAction action, PathSet & result)
{
result.clear();
string gcKeepOutputs = querySetting("gc-keep-outputs", "false");
/* Acquire the global GC root. This prevents
a) New roots from being added.
b) Processes from creating new temporary root files. */
@ -333,6 +330,19 @@ void collectGarbage(GCAction action, PathSet & result)
for (PathSet::const_iterator i = roots.begin(); i != roots.end(); ++i)
computeFSClosure(canonPath(*i), livePaths);
if (gcKeepOutputs == "true") {
/* Hmz, identical to storePathRequisites in nix-store. */
for (PathSet::iterator i = livePaths.begin();
i != livePaths.end(); ++i)
if (isDerivation(*i)) {
Derivation drv = derivationFromPath(*i);
for (DerivationOutputs::iterator j = drv.outputs.begin();
j != drv.outputs.end(); ++j)
if (isValidPath(j->second.path))
computeFSClosure(j->second.path, livePaths);
}
}
if (action == gcReturnLive) {
result = livePaths;
return;

View file

@ -1,10 +1,14 @@
#include "globals.hh"
#include <map>
string nixStore = "/UNINIT";
string nixDataDir = "/UNINIT";
string nixLogDir = "/UNINIT";
string nixStateDir = "/UNINIT";
string nixDBPath = "/UNINIT";
string nixConfDir = "/UNINIT";
bool keepFailed = false;
@ -17,3 +21,49 @@ Verbosity buildVerbosity = lvlInfo;
unsigned int maxBuildJobs = 1;
bool readOnlyMode = false;
static bool settingsRead = false;
static map<string, string> settings;
static void readSettings()
{
Path settingsFile = (format("%1%/%2%") % nixConfDir % "nix.conf").str();
if (!pathExists(settingsFile)) return;
string contents = readFile(settingsFile);
unsigned int pos = 0;
while (pos < contents.size()) {
string line;
while (pos < contents.size() && contents[pos] != '\n')
line += contents[pos++];
pos++;
unsigned int hash = line.find('#');
if (hash != string::npos)
line = string(line, 0, hash);
if (line.find_first_not_of(" ") == string::npos) continue;
istringstream is(line);
string name, sep, value;
is >> name >> sep >> value;
if (sep != "=" || !is)
throw Error(format("illegal configuration line `%1%'") % line);
settings[name] = value;
};
settingsRead = true;
}
string querySetting(const string & name, const string & def)
{
if (!settingsRead) readSettings();
map<string, string>::iterator i = settings.find(name);
return i == settings.end() ? def : i->second;
}

View file

@ -23,6 +23,11 @@ extern string nixStateDir;
/* nixDBPath is the path name of our Berkeley DB environment. */
extern string nixDBPath;
/* nixConfDir is the directory where configuration files are
stored. */
extern string nixConfDir;
/* Misc. global flags. */
@ -48,4 +53,7 @@ extern unsigned int maxBuildJobs;
extern bool readOnlyMode;
string querySetting(const string & name, const string & def);
#endif /* !__GLOBALS_H */

View file

@ -164,6 +164,27 @@ Strings readDirectory(const Path & path)
}
string readFile(int fd)
{
struct stat st;
if (fstat(fd, &st) == -1)
throw SysError("statting file");
unsigned char buf[st.st_size]; /* !!! stack space */
readFull(fd, buf, st.st_size);
return string((char *) buf, st.st_size);
}
string readFile(const Path & path)
{
AutoCloseFD fd = open(path.c_str(), O_RDONLY);
if (fd == -1)
throw SysError(format("opening file `%1%'") % path);
return readFile(fd);
}
static void _deletePath(const Path & path)
{
checkInterrupt();

View file

@ -90,6 +90,10 @@ bool isLink(const Path & path);
removed. */
Strings readDirectory(const Path & path);
/* Read the contents of a file into a string. */
string readFile(int fd);
string readFile(const Path & path);
/* Delete a path; i.e., in the case of a directory, it is deleted
recursively. Don't use this at home, kids. */
void deletePath(const Path & path);