1 files changed, 73 insertions, 0 deletions
diff --git a/src/libmain/shared.hh b/src/libmain/shared.hh
new file mode 100644
index 000000000000..b29b08bb597e
--- /dev/null
+++ b/src/libmain/shared.hh
@@ -0,0 +1,73 @@
+#pragma once
+
+#include "util.hh"
+
+#include <signal.h>
+
+#include <locale>
+
+
+/* These are not implemented here, but must be implemented by a
+   program linking against libmain. */
+
+/* Main program.  Called by main() after the ATerm library has been
+   initialised and some default arguments have been processed (and
+   removed from `args').  main() will catch all exceptions. */
+void run(nix::Strings args);
+
+/* Should print a help message to stdout and return. */
+void printHelp();
+
+extern std::string programId;
+
+
+namespace nix {
+
+MakeError(UsageError, nix::Error);
+
+class StoreAPI;
+
+/* Ugh.  No better place to put this. */
+void printGCWarning();
+
+void printMissing(StoreAPI & store, const PathSet & paths);
+
+void printMissing(const PathSet & willBuild,
+    const PathSet & willSubstitute, const PathSet & unknown,
+    unsigned long long downloadSize, unsigned long long narSize);
+
+template<class N> N getIntArg(const string & opt,
+    Strings::iterator & i, const Strings::iterator & end, bool allowUnit)
+{
+    ++i;
+    if (i == end) throw UsageError(format("`%1%' requires an argument") % opt);
+    string s = *i;
+    N multiplier = 1;
+    if (allowUnit && !s.empty()) {
+        char u = std::toupper(*s.rbegin());
+        if (std::isalpha(u)) {
+            if (u == 'K') multiplier = 1ULL << 10;
+            else if (u == 'M') multiplier = 1ULL << 20;
+            else if (u == 'G') multiplier = 1ULL << 30;
+            else if (u == 'T') multiplier = 1ULL << 40;
+            else throw UsageError(format("invalid unit specifier `%1%'") % u);
+            s.resize(s.size() - 1);
+        }
+    }
+    N n;
+    if (!string2Int(s, n))
+        throw UsageError(format("`%1%' requires an integer argument") % opt);
+    return n * multiplier;
+}
+
+/* Show the manual page for the specified program. */
+void showManPage(const string & name);
+
+extern volatile ::sig_atomic_t blockInt;
+
+/* Exit code of the program. */
+extern int exitCode;
+
+extern char * * argvSaved;
+
+}