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* `Fix' is a high-level descriptor instantiator for Nix. It replaces

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nix-instantiate.
This commit is contained in:
Eelco Dolstra 2003-04-08 12:00:51 +00:00
parent 814b256da4
commit 0d2b24cdd1
8 changed files with 405 additions and 217 deletions
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86
src/nix.cc
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@ -1,15 +1,11 @@
#include <iostream>
#include <fstream>
#include <memory>
#include <string>
#include <sstream>
#include <list>
#include <vector>
#include <set>
#include <map>
#include <cstdio>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
@ -20,10 +16,6 @@ extern "C" {
#include <aterm1.h>
}
extern "C" {
#include "md5.h"
}
#include "util.hh"
using namespace std;
@ -35,16 +27,6 @@ static string dbInstPkgs = "pkginst";
static string dbPrebuilts = "prebuilts";
/* The canonical system name, as returned by config.guess. */
static string thisSystem = SYSTEM;
/* The prefix of the Nix installation, and the environment variable
that can be used to override the default. */
static string nixHomeDir = "/nix";
static string nixHomeDirEnvVar = "NIX";
/* Wrapper classes that ensures that the database is closed upon
object destruction. */
class Db2 : public Db
@ -132,47 +114,6 @@ void enumDB(const string & dbname, DBPairs & contents)
}
string printHash(unsigned char * buf)
{
ostringstream str;
for (int i = 0; i < 16; i++) {
str.fill('0');
str.width(2);
str << hex << (int) buf[i];
}
return str.str();
}
/* Verify that a reference is valid (that is, is a MD5 hash code). */
void checkHash(const string & s)
{
string err = "invalid reference: " + s;
if (s.length() != 32)
throw BadRefError(err);
for (int i = 0; i < 32; i++) {
char c = s[i];
if (!((c >= '0' && c <= '9') ||
(c >= 'a' && c <= 'f')))
throw BadRefError(err);
}
}
/* Compute the MD5 hash of a file. */
string hashFile(string filename)
{
unsigned char hash[16];
FILE * file = fopen(filename.c_str(), "rb");
if (!file)
throw BadRefError("file `" + filename + "' does not exist");
int err = md5_stream(file, hash);
fclose(file);
if (err) throw BadRefError("cannot hash file");
return printHash(hash);
}
typedef map<string, string> Params;
@ -212,7 +153,14 @@ void readPkgDescr(const string & hash,
fileImports[name] = arg;
} else if (ATmatch(value, "Str(<str>)", &arg))
arguments[name] = arg;
else throw Error("invalid binding in " + pkgfile);
else if (ATmatch(value, "Bool(True)"))
arguments[name] = "1";
else if (ATmatch(value, "Bool(False)"))
arguments[name] = "";
else {
ATprintf("%t\n", value);
throw Error("invalid binding in " + pkgfile);
}
}
}
@ -473,12 +421,15 @@ void exportPkgs(string outDir,
Strings::iterator firstHash,
Strings::iterator lastHash)
{
outDir = absPath(outDir);
for (Strings::iterator it = firstHash; it != lastHash; it++) {
string hash = *it;
string pkgDir = getPkg(hash);
string tmpFile = outDir + "/export_tmp";
int res = system(("cd " + pkgDir + " && tar cvfj " + tmpFile + " .").c_str()); // !!! escaping
string cmd = "cd " + pkgDir + " && tar cvfj " + tmpFile + " .";
int res = system(cmd.c_str()); // !!! escaping
if (WEXITSTATUS(res) != 0)
throw Error("cannot tar " + pkgDir);
@ -500,19 +451,6 @@ void regPrebuilt(string pkgHash, string prebuiltHash)
}
string absPath(string filename)
{
if (filename[0] != '/') {
char buf[PATH_MAX];
if (!getcwd(buf, sizeof(buf)))
throw Error("cannot get cwd");
filename = string(buf) + "/" + filename;
/* !!! canonicalise */
}
return filename;
}
void registerFile(string filename)
{
filename = absPath(filename);