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* Refactoring: move initialisation and argument parsing into a shared

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file.
This commit is contained in:
Eelco Dolstra 2003-07-04 15:42:03 +00:00
parent 01b34fe584
commit f826e432aa
5 changed files with 86 additions and 52 deletions
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56
src/nix.cc
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@ -1,11 +1,10 @@
#include <iostream>
#include "config.h"
#include "globals.hh"
#include "values.hh"
#include "eval.hh"
#include "archive.hh"
#include "shared.hh"
typedef void (* Operation) (Strings opFlags, Strings opArgs);
@ -224,39 +223,14 @@ static void opInit(Strings opFlags, Strings opArgs)
}
/* Initialize, process arguments, and dispatch to the right
operation. */
static void run(int argc, char * * argv)
/* Scan the arguments; find the operation, set global flags, put all
other flags in a list, and put all other arguments in another
list. */
void run(Strings args)
{
/* Setup Nix paths. */
nixStore = NIX_STORE_DIR;
nixLogDir = NIX_LOG_DIR;
nixDB = (string) NIX_STATE_DIR + "/nixstate.db";
/* Put the arguments in a vector. */
Strings args;
while (argc--) args.push_back(*argv++);
args.erase(args.begin());
/* Expand compound dash options (i.e., `-qlf' -> `-q -l -f'). */
for (Strings::iterator it = args.begin();
it != args.end(); )
{
string arg = *it;
if (arg.length() > 2 && arg[0] == '-' && arg[1] != '-') {
for (unsigned int i = 1; i < arg.length(); i++)
args.insert(it, (string) "-" + arg[i]);
it = args.erase(it);
} else it++;
}
Strings opFlags, opArgs;
Operation op = 0;
/* Scan the arguments; find the operation, set global flags, put
all other flags in a list, and put all other arguments in
another list. */
for (Strings::iterator it = args.begin();
it != args.end(); it++)
{
@ -291,22 +265,4 @@ static void run(int argc, char * * argv)
}
int main(int argc, char * * argv)
{
/* ATerm setup. */
ATerm bottomOfStack;
ATinit(argc, argv, &bottomOfStack);
try {
run(argc, argv);
} catch (UsageError & e) {
cerr << "error: " << e.what() << endl
<< "Try `nix --help' for more information.\n";
return 1;
} catch (exception & e) {
cerr << "error: " << e.what() << endl;
return 1;
}
return 0;
}
string programId = "nix";