1 files changed, 107 insertions, 0 deletions
diff --git a/src/libmain/shared.hh b/src/libmain/shared.hh
new file mode 100644
index 000000000000..6d94a22f788e
--- /dev/null
+++ b/src/libmain/shared.hh
@@ -0,0 +1,107 @@
+#pragma once
+
+#include "util.hh"
+#include "args.hh"
+
+#include <signal.h>
+
+#include <locale>
+
+
+namespace nix {
+
+class Exit : public std::exception
+{
+public:
+    int status;
+    Exit() : status(0) { }
+    Exit(int status) : status(status) { }
+};
+
+int handleExceptions(const string & programName, std::function<void()> fun);
+
+void initNix();
+
+void parseCmdLine(int argc, char * * argv,
+    std::function<bool(Strings::iterator & arg, const Strings::iterator & end)> parseArg);
+
+void printVersion(const string & programName);
+
+/* Ugh.  No better place to put this. */
+void printGCWarning();
+
+class Store;
+
+void printMissing(ref<Store> store, const PathSet & paths);
+
+void printMissing(ref<Store> store, const PathSet & willBuild,
+    const PathSet & willSubstitute, const PathSet & unknown,
+    unsigned long long downloadSize, unsigned long long narSize);
+
+string getArg(const string & opt,
+    Strings::iterator & i, const Strings::iterator & end);
+
+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);
+
+/* The constructor of this class starts a pager if stdout is a
+   terminal and $PAGER is set. Stdout is redirected to the pager. */
+class RunPager
+{
+public:
+    RunPager();
+    ~RunPager();
+
+private:
+    Pid pid;
+};
+
+extern volatile ::sig_atomic_t blockInt;
+
+
+/* GC helpers. */
+
+string showBytes(unsigned long long bytes);
+
+struct GCResults;
+
+struct PrintFreed
+{
+    bool show;
+    const GCResults & results;
+    PrintFreed(bool show, const GCResults & results)
+        : show(show), results(results) { }
+    ~PrintFreed();
+};
+
+
+/* Install a SIGSEGV handler to detect stack overflows. */
+void detectStackOverflow();
+
+
+}