When ‘--help’ is given, just run ‘man’ to show the manual page

I.e. do what git does.  I'm too lazy to keep the builtin help text up
to date :-)

Also add ‘--help’ to various commands that lacked it
(e.g. nix-collect-garbage).

3 files changed, 2 insertions, 19 deletions

diff --git a/src/nix-worker/Makefile.am b/src/nix-worker/Makefile.am
index b6094a2a038c..6b1b2827cbf7 100644
--- a/src/nix-worker/Makefile.am
+++ b/src/nix-worker/Makefile.am
@@ -1,14 +1,9 @@
 bin_PROGRAMS = nix-worker
 
-nix_worker_SOURCES = nix-worker.cc help.txt
+nix_worker_SOURCES = nix-worker.cc
 nix_worker_LDADD = ../libmain/libmain.la ../libstore/libstore.la ../libutil/libutil.la \
  ../boost/format/libformat.la
 
-nix-worker.o: help.txt.hh
-
-%.txt.hh: %.txt
-	../bin2c/bin2c helpText < $< > $@ || (rm $@ && exit 1)
-
 AM_CXXFLAGS = \
  -I$(srcdir)/.. -I$(srcdir)/../libutil \
  -I$(srcdir)/../libstore -I$(srcdir)/../libmain
diff --git a/src/nix-worker/help.txt b/src/nix-worker/help.txt
deleted file mode 100644
index b4583cb7e495..000000000000
--- a/src/nix-worker/help.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-Usage: nix-worker [OPTIONS...] [--daemon | --slave]
-
-`nix-worker' is a helper program used to implement secure, multi-user
-Nix stores.  In `--daemon' mode, it goes into the background and waits
-for incoming connections on a Unix domain socket, and forks a process
-for each connection to perform the Nix store operations requested by
-the caller.  In `--slave' mode, `nix-worker' is called directly, and
-the caller and the worker communicate with each other over
-stdin/stdout.  In this mode, the `nix-worker' program should have
-appropriate setuid privileges.
diff --git a/src/nix-worker/nix-worker.cc b/src/nix-worker/nix-worker.cc
index dadde9cc5183..17ffdb616c65 100644
--- a/src/nix-worker/nix-worker.cc
+++ b/src/nix-worker/nix-worker.cc
@@ -923,11 +923,9 @@ void run(Strings args)
 }
 
 
-#include "help.txt.hh"
-
 void printHelp()
 {
-    std::cout << string((char *) helpText);
+    showManPage("nix-worker");
 }