* Started integrating the new evaluation model into Nix.
* Cleaned up command-line syntax.
This commit is contained in:
Eelco Dolstra
parent
7a96da3627
commit
34fcf5fa0c
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@ -10,5 +10,11 @@ AC_CANONICAL_HOST
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AC_PROG_CC
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AC_PROG_CXX
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# Unix shell scripting should die a slow and painful death.
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AC_DEFINE_UNQUOTED(NIX_VALUES_DIR, "$(eval echo $prefix/values)", Nix values directory.)
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AC_DEFINE_UNQUOTED(NIX_STATE_DIR, "$(eval echo $localstatedir/nix)", Nix state directory.)
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AC_DEFINE_UNQUOTED(NIX_LOG_DIR, "$(eval echo $localstatedir/log/nix)", Nix log file directory.)
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AC_CONFIG_HEADER([config.h])
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AC_CONFIG_FILES([Makefile src/Makefile scripts/Makefile])
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AC_OUTPUT
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@ -1,9 +1,9 @@
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bin_PROGRAMS = nix fix
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bin_PROGRAMS = nix # fix
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noinst_PROGRAMS = test
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AM_CXXFLAGS = -DSYSTEM=\"@host@\" -Wall
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AM_CXXFLAGS = -DSYSTEM=\"@host@\" -Wall -I..
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nix_SOURCES = nix.cc db.cc util.cc hash.cc md5.c
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nix_SOURCES = nix.cc util.cc hash.cc md5.c eval.cc values.cc globals.cc db.cc
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nix_LDADD = -ldb_cxx-4 -lATerm
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fix_SOURCES = fix.cc util.cc hash.cc md5.c
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@ -20,4 +20,4 @@ install-data-local:
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# $(INSTALL) -d $(localstatedir)/nix/prebuilts/exports
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$(INSTALL) -d $(localstatedir)/log/nix
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$(INSTALL) -d $(prefix)/values
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$(bindir)/nix init
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$(bindir)/nix --init
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@ -279,7 +279,7 @@ Expr evalValue(Expr e)
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string fn = queryValuePath(evalHash(e2));
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ATerm e3 = ATreadFromNamedFile(fn.c_str());
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if (!e3) throw Error("reading aterm from " + fn);
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return e3;
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return evalValue(e3);
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}
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/* Execution primitive. */
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@ -298,8 +298,8 @@ Expr evalValue(Expr e)
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evalArgs(args, argsNF, env);
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Hash sourceHash = hashExpr(
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ATmake("Exec(Str(<str>), Hash(<str>), [])",
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buildPlatform.c_str(), ((string) prog).c_str()));
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ATmake("Exec(Str(<str>), Hash(<str>), <term>)",
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buildPlatform.c_str(), ((string) prog).c_str(), argsNF));
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/* Do we know a normal form for sourceHash? */
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Hash targetHash;
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792
src/nix.cc
792
src/nix.cc
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@ -1,715 +1,171 @@
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#include <iostream>
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#include <list>
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#include <vector>
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#include <set>
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#include <map>
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#include <algorithm>
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#include <cstdio>
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#include <errno.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include "config.h"
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#include "util.hh"
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#include "hash.hh"
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#include "db.hh"
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#include "nix.hh"
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#include "globals.hh"
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#include "values.hh"
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#include "eval.hh"
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using namespace std;
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typedef void (* Operation) (Strings opFlags, Strings opArgs);
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void readPkgDescr(Hash hash,
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Params & pkgImports, Params & fileImports, Params & arguments)
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/* Parse a supposed value argument. This can be a hash (the simple
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case), a symbolic name (in which case we do a lookup to obtain the
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hash), or a file name (which we import to obtain the hash). Note
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that in order to disambiguate between symbolic names and file
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names, a file name should contain at least one `/'. */
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Hash parseValueArg(string s)
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{
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string pkgfile;
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pkgfile = getFile(hash);
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ATerm term = ATreadFromNamedFile(pkgfile.c_str());
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if (!term) throw Error("cannot read aterm " + pkgfile);
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ATerm bindings;
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if (!ATmatch(term, "Descr(<term>)", &bindings))
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throw Error("invalid term in " + pkgfile);
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char * cname;
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ATerm value;
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while (ATmatch(bindings, "[Bind(<str>, <term>), <list>]",
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&cname, &value, &bindings))
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{
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string name(cname);
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char * arg;
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if (ATmatch(value, "Pkg(<str>)", &arg)) {
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parseHash(arg);
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pkgImports[name] = arg;
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} else if (ATmatch(value, "File(<str>)", &arg)) {
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parseHash(arg);
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fileImports[name] = arg;
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} else if (ATmatch(value, "Str(<str>)", &arg))
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arguments[name] = arg;
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else if (ATmatch(value, "Bool(True)"))
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arguments[name] = "1";
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else if (ATmatch(value, "Bool(False)"))
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arguments[name] = "";
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else {
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ATprintf("%t\n", value);
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throw Error("invalid binding in " + pkgfile);
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}
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}
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}
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string getPkg(Hash hash);
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void fetchDeps(Hash hash, Environment & env)
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{
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/* Read the package description file. */
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Params pkgImports, fileImports, arguments;
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readPkgDescr(hash, pkgImports, fileImports, arguments);
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/* Recursively fetch all the dependencies, filling in the
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environment as we go along. */
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for (Params::iterator it = pkgImports.begin();
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it != pkgImports.end(); it++)
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{
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cerr << "fetching package dependency "
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<< it->first << " <- " << it->second
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<< endl;
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env[it->first] = getPkg(parseHash(it->second));
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}
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for (Params::iterator it = fileImports.begin();
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it != fileImports.end(); it++)
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{
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cerr << "fetching file dependency "
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<< it->first << " = " << it->second
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<< endl;
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string file;
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file = getFile(parseHash(it->second));
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env[it->first] = file;
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}
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string buildSystem;
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for (Params::iterator it = arguments.begin();
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it != arguments.end(); it++)
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{
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env[it->first] = it->second;
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if (it->first == "system")
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buildSystem = it->second;
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}
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if (buildSystem != thisSystem)
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throw Error("descriptor requires a `" + buildSystem +
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"' but I am a `" + thisSystem + "'");
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}
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string getFromEnv(const Environment & env, const string & key)
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{
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Environment::const_iterator it = env.find(key);
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if (it == env.end())
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throw Error("key " + key + " not found in the environment");
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return it->second;
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}
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string queryPkgId(Hash hash)
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{
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Params pkgImports, fileImports, arguments;
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readPkgDescr(hash, pkgImports, fileImports, arguments);
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return getFromEnv(arguments, "id");
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}
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void installPkg(Hash hash)
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{
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string pkgfile;
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string src;
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string path;
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string cmd;
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string builder;
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Environment env;
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/* Fetch dependencies. */
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fetchDeps(hash, env);
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builder = getFromEnv(env, "build");
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string id = getFromEnv(env, "id");
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/* Construct a path for the installed package. */
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path = nixHomeDir + "/pkg/" + id + "-" + (string) hash;
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/* Create the path. */
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if (mkdir(path.c_str(), 0777))
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throw Error("unable to create directory " + path);
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/* Create a log file. */
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string logFileName =
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nixLogDir + "/" + id + "-" + (string) hash + ".log";
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/* !!! auto-pclose on exit */
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FILE * logFile = popen(("tee " + logFileName + " >&2").c_str(), "w"); /* !!! escaping */
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if (!logFile)
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throw Error("unable to create log file " + logFileName);
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try {
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return parseHash(s);
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} catch (BadRefError e) { };
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/* Fork a child to build the package. */
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pid_t pid;
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switch (pid = fork()) {
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case -1:
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throw Error("unable to fork");
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case 0:
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try { /* child */
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/* Go to the build directory. */
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if (chdir(path.c_str())) {
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cerr << "unable to chdir to package directory\n";
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_exit(1);
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}
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/* Try to use a prebuilt. */
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string prebuiltHashS, prebuiltFile;
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if (queryDB(nixDB, dbPrebuilts, hash, prebuiltHashS)) {
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try {
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prebuiltFile = getFile(parseHash(prebuiltHashS));
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} catch (Error e) {
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cerr << "cannot obtain prebuilt (ignoring): " << e.what() << endl;
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goto build;
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}
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cerr << "substituting prebuilt " << prebuiltFile << endl;
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int res = system(("tar xfj " + prebuiltFile + " 1>&2").c_str()); // !!! escaping
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if (WEXITSTATUS(res) != 0)
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/* This is a fatal error, because path may now
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have clobbered. */
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throw Error("cannot unpack " + prebuiltFile);
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_exit(0);
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}
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build:
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/* Fill in the environment. We don't bother freeing
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the strings, since we'll exec or die soon
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anyway. */
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const char * env2[env.size() + 1];
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int i = 0;
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for (Environment::iterator it = env.begin();
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it != env.end(); it++, i++)
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env2[i] = (new string(it->first + "=" + it->second))->c_str();
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env2[i] = 0;
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/* Dup the log handle into stderr. */
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if (dup2(fileno(logFile), STDERR_FILENO) == -1)
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throw Error("cannot pipe standard error into log file: " + string(strerror(errno)));
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/* Dup stderr to stdin. */
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if (dup2(STDERR_FILENO, STDOUT_FILENO) == -1)
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throw Error("cannot dup stderr into stdout");
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/* Execute the builder. This should not return. */
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execle(builder.c_str(), builder.c_str(), 0, env2);
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throw Error("unable to execute builder: " +
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string(strerror(errno)));
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} catch (exception & e) {
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cerr << "build error: " << e.what() << endl;
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_exit(1);
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}
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}
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/* parent */
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/* Close the logging pipe. Note that this should not cause
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the logger to exit until builder exits (because the latter
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has an open file handle to the former). */
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pclose(logFile);
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/* Wait for the child to finish. */
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int status;
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if (waitpid(pid, &status, 0) != pid)
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throw Error("unable to wait for child");
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if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
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throw Error("unable to build package");
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/* Remove write permission from the build directory. */
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int res = system(("chmod -R -w " + path).c_str()); // !!! escaping
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if (WEXITSTATUS(res) != 0)
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throw Error("cannot remove write permission from " + path);
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} catch (exception &) {
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// system(("rm -rf " + path).c_str());
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throw;
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}
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setDB(nixDB, dbInstPkgs, hash, path);
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}
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string getPkg(Hash hash)
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{
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string path;
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while (!queryDB(nixDB, dbInstPkgs, hash, path))
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installPkg(hash);
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return path;
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}
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void runPkg(Hash hash,
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Strings::iterator firstArg,
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Strings::iterator lastArg)
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||||
{
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string src;
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string path;
|
||||
string cmd;
|
||||
string runner;
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Environment env;
|
||||
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/* Fetch dependencies. */
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fetchDeps(hash, env);
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runner = getFromEnv(env, "run");
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||||
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||||
/* Fill in the environment. We don't bother freeing the
|
||||
strings, since we'll exec or die soon anyway. */
|
||||
for (Environment::iterator it = env.begin();
|
||||
it != env.end(); it++)
|
||||
{
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||||
string * s = new string(it->first + "=" + it->second);
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putenv((char *) s->c_str());
|
||||
}
|
||||
|
||||
/* Create the list of arguments. */
|
||||
const char * args2[env.size() + 2];
|
||||
int i = 0;
|
||||
args2[i++] = runner.c_str();
|
||||
for (Strings::const_iterator it = firstArg; it != lastArg; it++, i++)
|
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args2[i] = it->c_str();
|
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args2[i] = 0;
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||||
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/* Execute the runner. This should not return. */
|
||||
execv(runner.c_str(), (char * *) args2);
|
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|
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cerr << strerror(errno) << endl;
|
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throw Error("unable to execute runner");
|
||||
}
|
||||
|
||||
|
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void ensurePkg(Hash hash)
|
||||
{
|
||||
Params pkgImports, fileImports, arguments;
|
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readPkgDescr(hash, pkgImports, fileImports, arguments);
|
||||
|
||||
if (fileImports.find("build") != fileImports.end())
|
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getPkg(hash);
|
||||
else if (fileImports.find("run") != fileImports.end()) {
|
||||
Environment env;
|
||||
fetchDeps(hash, env);
|
||||
} else throw Error("invalid descriptor");
|
||||
}
|
||||
|
||||
|
||||
void delPkg(Hash hash)
|
||||
{
|
||||
string path;
|
||||
if (queryDB(nixDB, dbInstPkgs, hash, path)) {
|
||||
int res = system(("chmod -R +w " + path + " && rm -rf " + path).c_str()); // !!! escaping
|
||||
delDB(nixDB, dbInstPkgs, hash); // not a bug ???
|
||||
if (WEXITSTATUS(res) != 0)
|
||||
cerr << "errors deleting " + path + ", ignoring" << endl;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void exportPkgs(string outDir,
|
||||
Strings::iterator firstHash,
|
||||
Strings::iterator lastHash)
|
||||
{
|
||||
outDir = absPath(outDir);
|
||||
|
||||
for (Strings::iterator it = firstHash; it != lastHash; it++) {
|
||||
Hash hash = parseHash(*it);
|
||||
string pkgDir = getPkg(hash);
|
||||
string tmpFile = outDir + "/export_tmp";
|
||||
|
||||
string cmd = "cd " + pkgDir + " && tar cfj " + tmpFile + " .";
|
||||
int res = system(cmd.c_str()); // !!! escaping
|
||||
if (!WIFEXITED(res) || WEXITSTATUS(res) != 0)
|
||||
throw Error("cannot tar " + pkgDir);
|
||||
|
||||
string prebuiltHash = hashFile(tmpFile);
|
||||
string pkgId = queryPkgId(hash);
|
||||
string prebuiltFile = outDir + "/" +
|
||||
pkgId + "-" + (string) hash + "-" + prebuiltHash + ".tar.bz2";
|
||||
|
||||
rename(tmpFile.c_str(), prebuiltFile.c_str());
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void registerPrebuilt(Hash pkgHash, Hash prebuiltHash)
|
||||
{
|
||||
setDB(nixDB, dbPrebuilts, pkgHash, prebuiltHash);
|
||||
}
|
||||
|
||||
|
||||
Hash registerFile(string filename)
|
||||
{
|
||||
filename = absPath(filename);
|
||||
Hash hash = hashFile(filename);
|
||||
setDB(nixDB, dbRefs, hash, filename);
|
||||
return hash;
|
||||
}
|
||||
|
||||
|
||||
void registerURL(Hash hash, string url)
|
||||
{
|
||||
setDB(nixDB, dbNetSources, hash, url);
|
||||
/* !!! currently we allow only one network source per hash */
|
||||
}
|
||||
|
||||
|
||||
/* This is primarily used for bootstrapping. */
|
||||
void registerInstalledPkg(Hash hash, string path)
|
||||
{
|
||||
if (path == "")
|
||||
delDB(nixDB, dbInstPkgs, hash);
|
||||
else
|
||||
setDB(nixDB, dbInstPkgs, hash, path);
|
||||
}
|
||||
|
||||
|
||||
void verifyDB()
|
||||
{
|
||||
/* Check that all file references are still valid. */
|
||||
DBPairs fileRefs;
|
||||
|
||||
enumDB(nixDB, dbRefs, fileRefs);
|
||||
|
||||
for (DBPairs::iterator it = fileRefs.begin();
|
||||
it != fileRefs.end(); it++)
|
||||
{
|
||||
try {
|
||||
Hash hash = parseHash(it->first);
|
||||
if (hashFile(it->second) != hash) {
|
||||
cerr << "file " << it->second << " has changed\n";
|
||||
delDB(nixDB, dbRefs, it->first);
|
||||
}
|
||||
} catch (Error e) { /* !!! better error check */
|
||||
cerr << "error: " << e.what() << endl;
|
||||
delDB(nixDB, dbRefs, it->first);
|
||||
}
|
||||
}
|
||||
|
||||
/* Check that all installed packages are still there. */
|
||||
DBPairs instPkgs;
|
||||
|
||||
enumDB(nixDB, dbInstPkgs, instPkgs);
|
||||
|
||||
for (DBPairs::iterator it = instPkgs.begin();
|
||||
it != instPkgs.end(); it++)
|
||||
{
|
||||
struct stat st;
|
||||
if (stat(it->second.c_str(), &st) == -1) {
|
||||
cerr << "package " << it->first << " has disappeared\n";
|
||||
delDB(nixDB, dbInstPkgs, it->first);
|
||||
}
|
||||
}
|
||||
|
||||
/* TODO: check that all directories in pkgHome are installed
|
||||
packages. */
|
||||
}
|
||||
|
||||
|
||||
void listInstalledPkgs()
|
||||
{
|
||||
DBPairs instPkgs;
|
||||
|
||||
enumDB(nixDB, dbInstPkgs, instPkgs);
|
||||
|
||||
for (DBPairs::iterator it = instPkgs.begin();
|
||||
it != instPkgs.end(); it++)
|
||||
cout << it->first << endl;
|
||||
}
|
||||
|
||||
|
||||
void printInfo(Strings::iterator first, Strings::iterator last)
|
||||
{
|
||||
for (Strings::iterator it = first; it != last; it++) {
|
||||
try {
|
||||
cout << *it << " " << queryPkgId(parseHash(*it)) << endl;
|
||||
} catch (Error & e) { // !!! more specific
|
||||
cout << *it << " (descriptor missing)\n";
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void computeClosure(Strings::iterator first, Strings::iterator last,
|
||||
set<string> & result)
|
||||
{
|
||||
list<string> workList(first, last);
|
||||
set<string> doneSet;
|
||||
|
||||
while (!workList.empty()) {
|
||||
Hash hash = parseHash(workList.front());
|
||||
workList.pop_front();
|
||||
|
||||
if (doneSet.find(hash) == doneSet.end()) {
|
||||
doneSet.insert(hash);
|
||||
|
||||
Params pkgImports, fileImports, arguments;
|
||||
readPkgDescr(hash, pkgImports, fileImports, arguments);
|
||||
|
||||
for (Params::iterator it = pkgImports.begin();
|
||||
it != pkgImports.end(); it++)
|
||||
workList.push_back(it->second);
|
||||
}
|
||||
}
|
||||
|
||||
result = doneSet;
|
||||
}
|
||||
|
||||
|
||||
void printClosure(Strings::iterator first, Strings::iterator last)
|
||||
{
|
||||
set<string> allHashes;
|
||||
computeClosure(first, last, allHashes);
|
||||
for (set<string>::iterator it = allHashes.begin();
|
||||
it != allHashes.end(); it++)
|
||||
cout << *it << endl;
|
||||
}
|
||||
|
||||
|
||||
string dotQuote(const string & s)
|
||||
{
|
||||
return "\"" + s + "\"";
|
||||
}
|
||||
|
||||
|
||||
void printGraph(Strings::iterator first, Strings::iterator last)
|
||||
{
|
||||
set<string> allHashes;
|
||||
computeClosure(first, last, allHashes);
|
||||
|
||||
cout << "digraph G {\n";
|
||||
|
||||
for (set<string>::iterator it = allHashes.begin();
|
||||
it != allHashes.end(); it++)
|
||||
{
|
||||
Params pkgImports, fileImports, arguments;
|
||||
readPkgDescr(parseHash(*it), pkgImports, fileImports, arguments);
|
||||
|
||||
cout << dotQuote(*it) << "[label = \""
|
||||
<< getFromEnv(arguments, "id")
|
||||
<< "\"];\n";
|
||||
|
||||
for (Params::iterator it2 = pkgImports.begin();
|
||||
it2 != pkgImports.end(); it2++)
|
||||
cout << dotQuote(it2->second) << " -> "
|
||||
<< dotQuote(*it) << ";\n";
|
||||
}
|
||||
|
||||
cout << "}\n";
|
||||
}
|
||||
|
||||
|
||||
void fetch(string id)
|
||||
{
|
||||
string fn;
|
||||
|
||||
/* Fetch the object referenced by id. */
|
||||
if (isHash(id)) {
|
||||
throw Error("not implemented");
|
||||
if (s.find('/') != string::npos) {
|
||||
return addValue(s);
|
||||
} else {
|
||||
fn = fetchURL(id);
|
||||
throw Error("not implemented");
|
||||
}
|
||||
|
||||
/* Register it by hash. */
|
||||
Hash hash = registerFile(fn);
|
||||
cout << (string) hash << endl;
|
||||
}
|
||||
|
||||
|
||||
void fetch(Strings::iterator first, Strings::iterator last)
|
||||
/* Evaluate values. */
|
||||
static void opEvaluate(Strings opFlags, Strings opArgs)
|
||||
{
|
||||
for (Strings::iterator it = first; it != last; it++)
|
||||
fetch(*it);
|
||||
if (!opFlags.empty()) throw UsageError("unknown flag");
|
||||
|
||||
for (Strings::iterator it = opArgs.begin();
|
||||
it != opArgs.end(); it++)
|
||||
{
|
||||
Hash hash = parseValueArg(*it);
|
||||
Expr e = ATmake("Deref(Hash(<str>))", ((string) hash).c_str());
|
||||
cerr << printExpr(evalValue(e)) << endl;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void printUsage()
|
||||
static void opDelete(Strings opFlags, Strings opArgs)
|
||||
{
|
||||
cerr <<
|
||||
"Usage: nix SUBCOMMAND OPTIONS...\n\
|
||||
\n\
|
||||
Subcommands:\n\
|
||||
\n\
|
||||
init\n\
|
||||
Initialize the database.\n\
|
||||
\n\
|
||||
verify\n\
|
||||
Remove stale entries from the database.\n\
|
||||
\n\
|
||||
regfile FILENAME...\n\
|
||||
Register each FILENAME keyed by its hash.\n\
|
||||
\n\
|
||||
reginst HASH PATH\n\
|
||||
Register an installed package.\n\
|
||||
\n\
|
||||
getpkg HASH...\n\
|
||||
For each HASH, ensure that the package referenced by HASH is\n\
|
||||
installed. Print out the path of the installation on stdout.\n\
|
||||
\n\
|
||||
delpkg HASH...\n\
|
||||
Uninstall the package referenced by each HASH, disregarding any\n\
|
||||
dependencies that other packages may have on HASH.\n\
|
||||
\n\
|
||||
listinst\n\
|
||||
Prints a list of installed packages.\n\
|
||||
\n\
|
||||
run HASH ARGS...\n\
|
||||
Run the descriptor referenced by HASH with the given arguments.\n\
|
||||
\n\
|
||||
ensure HASH...\n\
|
||||
Like getpkg, but if HASH refers to a run descriptor, fetch only\n\
|
||||
the dependencies.\n\
|
||||
\n\
|
||||
export DIR HASH...\n\
|
||||
Export installed packages to DIR.\n\
|
||||
\n\
|
||||
regprebuilt HASH1 HASH2\n\
|
||||
Inform Nix that an export HASH2 can be used to fast-build HASH1.\n\
|
||||
\n\
|
||||
info HASH...\n\
|
||||
Print information about the specified descriptors.\n\
|
||||
\n\
|
||||
closure HASH...\n\
|
||||
Determine the closure of the set of descriptors under the import\n\
|
||||
relation, starting at the given roots.\n\
|
||||
\n\
|
||||
graph HASH...\n\
|
||||
Like closure, but print a dot graph specification.\n\
|
||||
\n\
|
||||
fetch ID...\n\
|
||||
Fetch the objects identified by ID and place them in the Nix\n\
|
||||
sources directory. ID can be a hash or URL. Print out the hash\n\
|
||||
of the object.\n\
|
||||
";
|
||||
cerr << "delete!\n";
|
||||
}
|
||||
|
||||
|
||||
/* Add values to the Nix values directory and print the hashes of
|
||||
those values. */
|
||||
static void opAdd(Strings opFlags, Strings opArgs)
|
||||
{
|
||||
if (!opFlags.empty()) throw UsageError("unknown flag");
|
||||
|
||||
for (Strings::iterator it = opArgs.begin();
|
||||
it != opArgs.end(); it++)
|
||||
cout << (string) addValue(*it) << endl;
|
||||
}
|
||||
|
||||
|
||||
/* Initialise the Nix databases. */
|
||||
static void opInit(Strings opFlags, Strings opArgs)
|
||||
{
|
||||
if (!opFlags.empty()) throw UsageError("unknown flag");
|
||||
if (!opArgs.empty())
|
||||
throw UsageError("--init does not have arguments");
|
||||
initDB();
|
||||
}
|
||||
|
||||
|
||||
/* Nix syntax:
|
||||
|
||||
nix [OPTIONS...] [ARGUMENTS...]
|
||||
|
||||
Operations:
|
||||
|
||||
--evaluate / -e: evaluate values
|
||||
--delete / -d: delete values
|
||||
--query / -q: query stored values
|
||||
--add: add values
|
||||
--verify: verify Nix structures
|
||||
--dump: dump a value
|
||||
--init: initialise the Nix database
|
||||
--version: output version information
|
||||
--help: display help
|
||||
|
||||
Operations that work on values accept the hash code of a value, the
|
||||
symbolic name of a value, or a file name of a external value that
|
||||
will be added prior to the operation.
|
||||
|
||||
Query suboptions:
|
||||
|
||||
Selection:
|
||||
|
||||
--all / -a: query all stored values, otherwise given values
|
||||
|
||||
Information:
|
||||
|
||||
--info / -i: general value information
|
||||
|
||||
Options:
|
||||
|
||||
--verbose / -v: verbose operation
|
||||
*/
|
||||
|
||||
/* Initialize, process arguments, and dispatch to the right
|
||||
operation. */
|
||||
void run(Strings::iterator argCur, Strings::iterator argEnd)
|
||||
{
|
||||
umask(0022);
|
||||
Strings opFlags, opArgs;
|
||||
Operation op = 0;
|
||||
|
||||
char * homeDir = getenv(nixHomeDirEnvVar.c_str());
|
||||
if (homeDir) nixHomeDir = homeDir;
|
||||
/* Setup Nix paths. */
|
||||
nixValues = NIX_VALUES_DIR;
|
||||
nixLogDir = NIX_LOG_DIR;
|
||||
nixDB = (string) NIX_STATE_DIR + "/nixstate.db";
|
||||
|
||||
nixSourcesDir = nixHomeDir + "/var/nix/sources";
|
||||
nixLogDir = nixHomeDir + "/var/log/nix";
|
||||
nixDB = nixHomeDir + "/var/nix/pkginfo.db";
|
||||
/* Scan the arguments; find the operation, set global flags, put
|
||||
all other flags in a list, and put all other arguments in
|
||||
another list. */
|
||||
|
||||
/* Parse the global flags. */
|
||||
for ( ; argCur != argEnd; argCur++) {
|
||||
string arg(*argCur);
|
||||
if (arg == "-h" || arg == "--help") {
|
||||
printUsage();
|
||||
return;
|
||||
} else if (arg[0] == '-') {
|
||||
throw UsageError("invalid option `" + arg + "'");
|
||||
} else break;
|
||||
while (argCur != argEnd) {
|
||||
string arg = *argCur++;
|
||||
|
||||
Operation oldOp = op;
|
||||
|
||||
if (arg == "--evaluate" || arg == "-e")
|
||||
op = opEvaluate;
|
||||
else if (arg == "--delete" || arg == "-d")
|
||||
op = opDelete;
|
||||
else if (arg == "--add")
|
||||
op = opAdd;
|
||||
else if (arg == "--init")
|
||||
op = opInit;
|
||||
else if (arg[0] == '-')
|
||||
opFlags.push_back(arg);
|
||||
else
|
||||
opArgs.push_back(arg);
|
||||
|
||||
if (oldOp && oldOp != op)
|
||||
throw UsageError("only one operation may be specified");
|
||||
}
|
||||
|
||||
UsageError argcError("wrong number of arguments");
|
||||
if (!op) throw UsageError("no operation specified");
|
||||
|
||||
/* Parse the command. */
|
||||
if (argCur == argEnd) throw UsageError("no command specified");
|
||||
string cmd = *argCur++;
|
||||
int argc = argEnd - argCur;
|
||||
|
||||
if (cmd == "init") {
|
||||
if (argc != 0) throw argcError;
|
||||
initDB();
|
||||
} else if (cmd == "verify") {
|
||||
if (argc != 0) throw argcError;
|
||||
verifyDB();
|
||||
} else if (cmd == "getpkg") {
|
||||
for (Strings::iterator it = argCur; it != argEnd; it++) {
|
||||
string path = getPkg(parseHash(*it));
|
||||
cout << path << endl;
|
||||
}
|
||||
} else if (cmd == "delpkg") {
|
||||
for (Strings::iterator it = argCur; it != argEnd; it++)
|
||||
delPkg(parseHash(*it));
|
||||
} else if (cmd == "run") {
|
||||
if (argc < 1) throw argcError;
|
||||
runPkg(parseHash(*argCur), argCur + 1, argEnd);
|
||||
} else if (cmd == "ensure") {
|
||||
for (Strings::iterator it = argCur; it != argEnd; it++)
|
||||
ensurePkg(parseHash(*it));
|
||||
} else if (cmd == "export") {
|
||||
if (argc < 1) throw argcError;
|
||||
exportPkgs(*argCur, argCur + 1, argEnd);
|
||||
} else if (cmd == "regprebuilt") {
|
||||
if (argc != 2) throw argcError;
|
||||
registerPrebuilt(parseHash(argCur[0]), parseHash(argCur[1]));
|
||||
} else if (cmd == "regfile") {
|
||||
for_each(argCur, argEnd, registerFile);
|
||||
} else if (cmd == "regurl") {
|
||||
registerURL(parseHash(argCur[0]), argCur[1]);
|
||||
} else if (cmd == "reginst") {
|
||||
if (argc != 2) throw argcError;
|
||||
registerInstalledPkg(parseHash(argCur[0]), argCur[1]);
|
||||
} else if (cmd == "listinst") {
|
||||
if (argc != 0) throw argcError;
|
||||
listInstalledPkgs();
|
||||
} else if (cmd == "info") {
|
||||
printInfo(argCur, argEnd);
|
||||
} else if (cmd == "closure") {
|
||||
printClosure(argCur, argEnd);
|
||||
} else if (cmd == "graph") {
|
||||
printGraph(argCur, argEnd);
|
||||
} else if (cmd == "fetch") {
|
||||
fetch(argCur, argEnd);
|
||||
} else
|
||||
throw UsageError("unknown command: " + string(cmd));
|
||||
op(opFlags, opArgs);
|
||||
}
|
||||
|
||||
|
||||
int main(int argc, char * * argv)
|
||||
{
|
||||
/* ATerm setup. */
|
||||
ATerm bottomOfStack;
|
||||
ATinit(argc, argv, &bottomOfStack);
|
||||
|
||||
/* Put the arguments in a vector. */
|
||||
try {
|
||||
|
||||
Strings args;
|
||||
while (argc--) args.push_back(*argv++);
|
||||
Strings::iterator argCur = args.begin(), argEnd = args.end();
|
||||
run(args.begin() + 1, args.end());
|
||||
|
||||
argCur++;
|
||||
|
||||
try {
|
||||
run(argCur, argEnd);
|
||||
} catch (UsageError & e) {
|
||||
cerr << "error: " << e.what() << endl
|
||||
<< "Try `nix -h' for more information.\n";
|
||||
<< "Try `nix --help' for more information.\n";
|
||||
return 1;
|
||||
} catch (exception & e) {
|
||||
cerr << "error: " << e.what() << endl;
|
||||
|
|
|
|||
|
|
@ -19,6 +19,8 @@ static string absValuePath(string s)
|
|||
|
||||
Hash addValue(string path)
|
||||
{
|
||||
path = absPath(path);
|
||||
|
||||
Hash hash = hashPath(path);
|
||||
|
||||
string name;
|
||||
|
|
@ -79,7 +81,7 @@ string queryValuePath(Hash hash)
|
|||
return fn;
|
||||
}
|
||||
|
||||
throw Error("a file with hash " + (string) hash + " is requested, "
|
||||
throw Error("a file with hash " + (string) hash + " is required, "
|
||||
"but it is not known to exist locally or on the network");
|
||||
#if 0
|
||||
if (checkedNet)
|
||||
|
|
@ -87,7 +89,7 @@ string queryValuePath(Hash hash)
|
|||
" should have hash " + (string) hash + ", but it doesn't");
|
||||
|
||||
if (!queryDB(nixDB, dbNetSources, hash, url))
|
||||
throw Error("a file with hash " + (string) hash + " is requested, "
|
||||
throw Error("a file with hash " + (string) hash + " is required, "
|
||||
"but it is not known to exist locally or on the network");
|
||||
|
||||
checkedNet = true;
|
||||
|
|
|
|||
Loading…
Reference in a new issue