Logic moved from truckle to cave.

truckle commands to cave added: `cave do`, `cave retry`, `cave upgrade`
You do not need truckle upgrade, now sudo cave upgrade works, too.
These commands do not depend on truckle, it works fine with cave-only.

Environment variables added via `/etc/profile.d/cave.sh`.
At the moment only resume-file-depended variables
(TRUCKLE_RESUME_FILE, CAVE_RESUME_OPTIONS, CAVE_RESOLVE_OPTIONS, ...)
If you use cave, the resume-file will be used automaticaly.
You do not need truckle anymore to have auto-resume-files.
But sudo will remove these from env...

Sudoers-config for cave added via `/etc/sudoers.d/cave`.
sudo will keep the same variables like defined in `/etc/profile.d/cave.sh`.
I do not know, but i think it can be a security hole.
But never allow users to use cave as root!
So, now you can use sudo, too.

These combinations of new cave-related changes will allow this:

  sudo cave upgrade
  sudo cave do
  # something went wrong?
  sudo cave retry

Only pagered it is easier with truckle:

  sudo cave -cy upgrade | less -R
  # vs.
  truckle upgrade

Makefile

@@ -2,20 +2,35 @@
 # vi:set filetype=makefile
 NULL=0  exec make "CALL=$0" "EXE=`which $0`" -f "`which $0`" -- "$@"
 
-D := /
 PREFIX := /usr/local
 BIN_PREFIX := $(PREFIX)/bin
+CAVE_COMMANDS_PREFIX := /usr/libexec/cave/commands
+SYS_CONF_DIR := /etc
+PROFILE_DIR := $(SYS_CONF_DIR)/profile.d
+SUDOERS_DIR := $(SYS_CONF_DIR)/sudoers.d
+D += /
 
 all: truckle
 	@echo 'Nothing to do :)'
 	@echo 'Please run "make install" to install.'
 
-install: truckle
+install_truckle: truckle
 	mkdir -p $(D)$(BIN_PREFIX)
 	install -m 0755 truckle $(D)$(BIN_PREFIX)/truckle
 	for c in `./truckle --list-commands`; do ln -fs truckle $(D)$(BIN_PREFIX)/truckle-$${c} ; done
 	for c in trdo tresume tretry; do ln -fs truckle $(D)$(BIN_PREFIX)/$${c} ; done
 
+install_cave_commands:
+	mkdir -p $(D)$(CAVE_COMMANDS_PREFIX)
+	install -m 0755 -o root -g root -t $(D)$(CAVE_COMMANDS_PREFIX) cave_commands/*
+
+install_configs:
+	mkdir -p $(D)$(PROFILE_DIR) $(D)$(SUDOERS_DIR)
+	install -m 0644 -o root -g root configs/profile.sh $(D)$(PROFILE_DIR)/cave.sh
+	install -m 0440 -o root -g root configs/sudoers $(D)$(SUDOERS_DIR)/cave
+
+install: install_truckle install_cave_commands install_configs
+
 README.md: truckle README.pre.md
 	( cat README.pre.md ; ./truckle --help ) > README.md.tmp
 	mv README.md.tmp README.md

cave_commands/do

@@ -0,0 +1,2 @@
+#!/usr/bin/env sh
+exec ${CAVE} resume "${@}"

cave_commands/retry

@@ -0,0 +1,2 @@
+#!/usr/bin/env sh
+exec ${CAVE} resume --retry-failed --retry-skipped "${@}"

cave_commands/upgrade

@@ -0,0 +1,2 @@
+#!/usr/bin/env sh
+exec ${CAVE} resolve -c world "${@}"

configs/profile.sh

@@ -0,0 +1,8 @@
+TRUCKLE_RESUME_FILE="/tmp/truckle-resume-pid-${$}"
+CAVE_all_commands_OPTIONS="--resume-file ${TRUCKLE_RESUME_FILE}"
+CAVE_RESOLVE_OPTIONS="${CAVE_all_commands_OPTIONS}"
+CAVE_RESUME_OPTIONS="${CAVE_all_commands_OPTIONS}"
+CAVE_FIX_LINKAGE_OPTIONS="${CAVE_all_commands_OPTIONS}"
+CAVE_UNINSTALL_OPTIONS="${CAVE_all_commands_OPTIONS}"
+export TRUCKLE_RESUME_FILE CAVE_all_commands_OPTIONS CAVE_RESOLVE_OPTIONS
+export CAVE_RESUME_OPTIONS CAVE_FIX_LINKAGE_OPTIONS CAVE_UNINSTALL_OPTIONS

configs/sudoers

@@ -0,0 +1 @@
+Defaults env_keep += "TRUCKLE_RESUME_FILE* CAVE_RESUME_OPTIONS CAVE_RESOLVE_OPTIONS CAVE_RESUME_OPTIONS CAVE_FIX_LINKAGE_OPTIONS CAVE_UNINSTALL_OPTIONS"

truckle

@@ -183,8 +183,12 @@ class RunCave
 			puts a.shelljoin
 			0
 		else
+			begin
 				Kernel.system *a
 				$? && $?.exitstatus
+			rescue Interrupt
+				nil
+			end
 		end
 	end
 
@@ -385,16 +389,12 @@ EOF
 			cave.()
 		}
 		cmds.on :remove, &sudo_pagered {|cmd, *args| cave.resumable!.uninstall(*args).()}
-		cmds.on :upgrade, &sudo_pagered {|cmd, *args|
+		cmds.on :upgrade, &sudo_pagered {|*args| cave.resumable!.this( *args).() }
-			cave.resumable!.resolve( '-c', :world, *args).()
-		}
 		cmds.on :install, &sudod {|cmd, *argv| cave.resumable!.resolve( '-x', *argv).() }
 		cmds.on :uninstall, &sudod {|cmd, *argv| cave.resumable!.uninstall( '-x', *argv).() }
 
 		cmds.on :do, :resume, &sudod {|cmd, *args| cave.resumable!.resume( *args).() }
-		cmds.on :retry, &sudod {|cmd, *args|
+		cmds.on :retry, &sudod {|*args| cave.resumable!.this( *args).() }
-			cave.resumable!.resume( '--retry-failed', '--retry-skipped', *args).()
-		}
 
 		cmds.on '--list-commands', &pagered { puts cmds.map {|k,v| k } }
 	end