* Various updates.
This commit is contained in:
parent
b3594e9eaf
commit
f7a98e081d
1 changed files with 152 additions and 78 deletions
150
src/nix.cc
150
src/nix.cc
|
@ -16,8 +16,11 @@
|
|||
using namespace std;
|
||||
|
||||
|
||||
#define PKGINFO_ENVVAR "NIX_DB"
|
||||
#define PKGINFO_PATH "/pkg/sys/var/pkginfo"
|
||||
|
||||
#define PKGHOME_ENVVAR "NIX_PKGHOME"
|
||||
|
||||
|
||||
static string dbRefs = "refs";
|
||||
static string dbInstPkgs = "pkginst";
|
||||
|
@ -27,6 +30,25 @@ static string prog;
|
|||
static string dbfile = PKGINFO_PATH;
|
||||
|
||||
|
||||
static string pkgHome = "/pkg";
|
||||
|
||||
|
||||
class Error : public exception
|
||||
{
|
||||
string err;
|
||||
public:
|
||||
Error(string _err) { err = _err; }
|
||||
~Error() throw () { };
|
||||
const char * what() const throw () { return err.c_str(); }
|
||||
};
|
||||
|
||||
class UsageError : public Error
|
||||
{
|
||||
public:
|
||||
UsageError(string _err) : Error(_err) { };
|
||||
};
|
||||
|
||||
|
||||
/* Wrapper class that ensures that the database is closed upon
|
||||
object destruction. */
|
||||
class Db2 : public Db
|
||||
|
@ -96,12 +118,12 @@ void checkRef(const string & s)
|
|||
{
|
||||
string err = "invalid reference: " + s;
|
||||
if (s.length() != 32)
|
||||
throw err;
|
||||
throw Error(err);
|
||||
for (int i = 0; i < 32; i++) {
|
||||
char c = s[i];
|
||||
if (!((c >= '0' && c <= '9') ||
|
||||
(c >= 'a' && c <= 'f')))
|
||||
throw err;
|
||||
throw Error(err);
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -112,10 +134,10 @@ string makeRef(string filename)
|
|||
char hash[33];
|
||||
|
||||
FILE * pipe = popen(("md5sum " + filename).c_str(), "r");
|
||||
if (!pipe) throw string("cannot execute md5sum");
|
||||
if (!pipe) throw Error("cannot execute md5sum");
|
||||
|
||||
if (fread(hash, 32, 1, pipe) != 1)
|
||||
throw string("cannot read hash from md5sum");
|
||||
throw Error("cannot read hash from md5sum");
|
||||
hash[32] = 0;
|
||||
|
||||
pclose(pipe);
|
||||
|
@ -166,7 +188,7 @@ void readPkgDescr(const string & pkgfile,
|
|||
pkgImports.push_back(Dep(name, ref));
|
||||
else if (op == "=")
|
||||
fileImports.push_back(Dep(name, ref));
|
||||
else throw string("invalid operator " + op);
|
||||
else throw Error("invalid operator " + op);
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -187,13 +209,13 @@ void installPkg(string pkgref)
|
|||
string builder;
|
||||
|
||||
if (!queryDB("refs", pkgref, pkgfile))
|
||||
throw string("unknown package " + pkgref);
|
||||
throw Error("unknown package " + pkgref);
|
||||
|
||||
cerr << "installing package " + pkgref + " from " + pkgfile + "\n";
|
||||
|
||||
/* Verify that the file hasn't changed. !!! race */
|
||||
if (makeRef(pkgfile) != pkgref)
|
||||
throw string("file " + pkgfile + " is stale");
|
||||
throw Error("file " + pkgfile + " is stale");
|
||||
|
||||
/* Read the package description file. */
|
||||
DepList pkgImports, fileImports;
|
||||
|
@ -222,10 +244,10 @@ void installPkg(string pkgref)
|
|||
string file;
|
||||
|
||||
if (!queryDB("refs", it->ref, file))
|
||||
throw string("unknown file " + it->ref);
|
||||
throw Error("unknown file " + it->ref);
|
||||
|
||||
if (makeRef(file) != it->ref)
|
||||
throw string("file " + file + " is stale");
|
||||
throw Error("file " + file + " is stale");
|
||||
|
||||
if (it->name == "build")
|
||||
builder = file;
|
||||
|
@ -234,23 +256,25 @@ void installPkg(string pkgref)
|
|||
}
|
||||
|
||||
if (builder == "")
|
||||
throw string("no builder specified");
|
||||
throw Error("no builder specified");
|
||||
|
||||
/* Construct a path for the installed package. */
|
||||
path = "/pkg/" + pkgref;
|
||||
path = pkgHome + "/" + pkgref;
|
||||
|
||||
/* Create the path. */
|
||||
if (mkdir(path.c_str(), 0777))
|
||||
throw string("unable to create directory " + path);
|
||||
throw Error("unable to create directory " + path);
|
||||
|
||||
try {
|
||||
|
||||
/* Fork a child to build the package. */
|
||||
pid_t pid;
|
||||
switch (pid = fork()) {
|
||||
|
||||
case -1:
|
||||
throw string("unable to fork");
|
||||
throw Error("unable to fork");
|
||||
|
||||
case 0: /* child */
|
||||
case 0: { /* child */
|
||||
|
||||
/* Go to the build directory. */
|
||||
if (chdir(path.c_str())) {
|
||||
|
@ -276,15 +300,22 @@ void installPkg(string pkgref)
|
|||
_exit(1);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/* parent */
|
||||
|
||||
/* Wait for the child to finish. */
|
||||
int status;
|
||||
if (waitpid(pid, &status, 0) != pid)
|
||||
throw string("unable to wait for child");
|
||||
throw Error("unable to wait for child");
|
||||
|
||||
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
|
||||
throw string("unable to build package");
|
||||
throw Error("unable to build package");
|
||||
|
||||
} catch (exception &) {
|
||||
system(("rm -rf " + path).c_str());
|
||||
throw;
|
||||
}
|
||||
|
||||
setDB(dbInstPkgs, pkgref, path);
|
||||
}
|
||||
|
@ -305,7 +336,7 @@ string absPath(string filename)
|
|||
if (filename[0] != '/') {
|
||||
char buf[PATH_MAX];
|
||||
if (!getcwd(buf, sizeof(buf)))
|
||||
throw string("cannot get cwd");
|
||||
throw Error("cannot get cwd");
|
||||
filename = string(buf) + "/" + filename;
|
||||
/* !!! canonicalise */
|
||||
}
|
||||
|
@ -343,69 +374,112 @@ void run(int argc, char * * argv)
|
|||
string cmd;
|
||||
|
||||
if (argc < 1)
|
||||
throw string("command not specified");
|
||||
throw UsageError("no command specified");
|
||||
|
||||
cmd = argv[0];
|
||||
argc--, argv++;
|
||||
|
||||
if (cmd == "init") {
|
||||
if (argc != 0)
|
||||
throw string("init doesn't have arguments");
|
||||
throw UsageError("wrong number of arguments");
|
||||
initDB();
|
||||
} else if (cmd == "getpkg") {
|
||||
if (argc != 1)
|
||||
throw string("arguments missing in getpkg");
|
||||
throw UsageError("wrong number of arguments");
|
||||
string path = getPkg(argv[0]);
|
||||
cout << path << endl;
|
||||
} else if (cmd == "reg") {
|
||||
} else if (cmd == "regfile") {
|
||||
if (argc != 1)
|
||||
throw string("arguments missing in reg");
|
||||
throw UsageError("wrong number of arguments");
|
||||
registerFile(argv[0]);
|
||||
} else if (cmd == "regpkg") {
|
||||
} else if (cmd == "reginst") {
|
||||
if (argc != 2)
|
||||
throw string("arguments missing in regpkg");
|
||||
throw UsageError("wrong number of arguments");
|
||||
registerInstalledPkg(argv[0], argv[1]);
|
||||
} else
|
||||
throw string("unknown command: " + string(cmd));
|
||||
throw UsageError("unknown command: " + string(cmd));
|
||||
}
|
||||
|
||||
|
||||
int main(int argc, char * * argv)
|
||||
void printUsage()
|
||||
{
|
||||
cerr <<
|
||||
"Usage: nix SUBCOMMAND OPTIONS...
|
||||
|
||||
Subcommands:
|
||||
|
||||
init
|
||||
Initialize the database.
|
||||
|
||||
regfile FILENAME
|
||||
Register FILENAME keyed by its hash.
|
||||
|
||||
reginst HASH PATH
|
||||
Register an installed package.
|
||||
|
||||
getpkg HASH
|
||||
Ensure that the package referenced by HASH is installed. Prints
|
||||
out the path of the package on stdout.
|
||||
";
|
||||
}
|
||||
|
||||
|
||||
void main2(int argc, char * * argv)
|
||||
{
|
||||
int c;
|
||||
|
||||
prog = argv[0];
|
||||
|
||||
umask(0022);
|
||||
|
||||
try {
|
||||
if (getenv(PKGINFO_ENVVAR))
|
||||
dbfile = getenv(PKGINFO_ENVVAR);
|
||||
|
||||
while ((c = getopt(argc, argv, "d:")) != EOF) {
|
||||
if (getenv(PKGHOME_ENVVAR))
|
||||
pkgHome = getenv(PKGHOME_ENVVAR);
|
||||
|
||||
opterr = 0;
|
||||
|
||||
while ((c = getopt(argc, argv, "hd:")) != EOF) {
|
||||
|
||||
switch (c) {
|
||||
|
||||
case 'h':
|
||||
printUsage();
|
||||
return;
|
||||
|
||||
case 'd':
|
||||
dbfile = optarg;
|
||||
break;
|
||||
|
||||
default:
|
||||
throw string("unknown option");
|
||||
throw UsageError("invalid option `" + string(1, optopt) + "'");
|
||||
break;
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
argc -= optind, argv += optind;
|
||||
run(argc, argv);
|
||||
}
|
||||
|
||||
|
||||
int main(int argc, char * * argv)
|
||||
{
|
||||
prog = argv[0];
|
||||
|
||||
try {
|
||||
try {
|
||||
|
||||
main2(argc, argv);
|
||||
|
||||
} catch (DbException e) {
|
||||
cerr << "db exception: " << e.what() << endl;
|
||||
throw Error(e.what());
|
||||
}
|
||||
|
||||
} catch (UsageError & e) {
|
||||
cerr << "error: " << e.what() << endl
|
||||
<< "Try `nix -h' for more information.\n";
|
||||
return 1;
|
||||
} catch (exception e) {
|
||||
cerr << e.what() << endl;
|
||||
return 1;
|
||||
} catch (string s) {
|
||||
cerr << s << endl;
|
||||
} catch (exception & e) {
|
||||
cerr << "error: " << e.what() << endl;
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
|
Loading…
Reference in a new issue