Add support for Byron Rakitzis’ rc shell reimplementation

Fixes #1238

docs/source/develop/segments.rst

@@ -416,11 +416,15 @@ Shell
     Currently it is expected to contain at least the following attributes:
 
     ``last_exit_code``
-        Exit code returned by last shell command.
+        Exit code returned by last shell command. Is either one integer, 
+        ``sig{name}`` or ``sig{name}+core`` (latter two are only seen in ``rc`` 
+        shell).
 
     ``last_pipe_status``
         List of exit codes returned by last programs in the pipe or some false 
-        object. Only available in ``zsh``.
+        object. Only available in ``zsh`` and ``rc``. Is a list of either 
+        integers, ``sig{name}`` or ``sig{name}+core`` (latter two are only seen 
+        in ``rc`` shell).
 
     ``jobnum``
         Number of background jobs.

docs/source/usage/shell-prompts.rst

@@ -67,6 +67,27 @@ is the absolute path to your Powerline installation directory:
 
 .. _tmux-statusline:
 
+Rcsh prompt
+===========
+
+Powerline supports Plan9 rc reimplementation *by Byron Rakitzis* packaged by 
+many \*nix distributions. To use it add
+
+.. code-black:: bash
+
+   . {repository_root}/powerline/bindings/rc/powerline.rc
+
+to your :file:`rcrc` file (usually :file:`~/.rcrc`) and make sure you start your 
+shell as a login shell (with ``-l`` argument): otherwise this configuration file 
+is not read.
+
+.. warning::
+   Original Plan9 shell and its \*nix port are not supported because they are 
+   missing ``prompt`` special function (it is being called once before each 
+   non-continuation prompt). Since powerline could not support shell without 
+   this or equivalent feature some other not-so-critical features of that port 
+   were used.
+
 Busybox (ash), mksh and dash prompt
 =====================================
 

powerline/bindings/rc/powerline.rc

@@ -0,0 +1,84 @@
+fn _powerline_sigwinch {
+	_POWERLINE_COLUMNS = `{
+		stty size | cut -d' ' -f2
+	}
+	_powerline_tmux_setenv COLUMNS $_POWERLINE_COLUMNS
+}
+fn _powerline_update_pwd {
+	_POWERLINE_NEW_PWD = `{pwd}
+	if (test $^_POWERLINE_NEW_PWD '=' $^_POWERLINE_SAVED_PWD) {
+		_POWERLINE_SAVED_PWD = $_POWERLINE_NEW_PWD
+		_powerline_tmux_setenv PWD $_POWERLINE_SAVED_PWD
+	}
+}
+fn _powerline_continuation_prompt {
+	_powerline_prompt --renderer-arg 'local_theme=continuation' $*
+}
+fn _powerline_prompt {
+	$POWERLINE_COMMAND $POWERLINE_COMMAND_ARGS shell aboveleft -r.rcsh --last-pipe-status $^_POWERLINE_STATUS --last-exit-code $_POWERLINE_STATUS($#_POWERLINE_STATUS) --jobnum $_POWERLINE_JOBNUM --renderer-arg 'client_id='$pid $*
+}
+fn _powerline_set_prompt {
+	_POWERLINE_STATUS = ( $status )
+	_POWERLINE_JOBNUM = $#apids
+	prompt = (``() {
+		_powerline_prompt
+	} ``() {
+		_powerline_continuation_prompt
+	})
+	_powerline_update_pwd
+}
+
+fn _powerline_common_setup {
+	fn sigwinch {
+		_powerline_sigwinch
+	}
+	_powerline_sigwinch
+	_POWERLINE_SAVED_PWD = ''
+}
+
+fn _powerline_tmux_setenv {
+}
+
+if (test -z $POWERLINE_CONFIG_COMMAND) {
+	if (which powerline-config >/dev/null) {
+		POWERLINE_CONFIG_COMMAND = powerline-config
+	} else {
+		echo powerline-config executable not found, unable to proceed >[2=1]
+	}
+}
+if (test x$POWERLINE_CONFIG_COMMAND '!=' x) {
+	if ($POWERLINE_CONFIG_COMMAND shell --shell rcsh uses prompt) {
+		if (test x$POWERLINE_COMMAND_ARGS '!=' x) {
+			# Perform splitting
+			POWERLINE_COMMAND_ARGS=( `{echo $POWERLINE_COMMAND_ARGS} )
+		}
+		fn prompt {
+			_powerline_set_prompt
+		}
+		if (test -z $POWERLINE_SHELL_CONTINUATION$POWERLINE_RCSH_CONTINUATION) {
+			_POWERLINE_STATUS = 0
+			_POWERLINE_JOBNUM = 0
+			_POWERLINE_CONTINUATION = `{
+				_powerline_continuation_prompt
+			}
+			fn _powerline_continuation_prompt {
+				echo -n $_POWERLINE_CONTINUATION
+			}
+		}
+		_powerline_common_setup
+	}
+	if (test x$TMUX '!=' x) {
+		if ($POWERLINE_CONFIG_COMMAND shell --shell rcsh uses tmux) {
+			_POWERLINE_TMUX=$TMUX
+			fn _powerline_tmux_setenv {
+				if (test x$2 '!=' x) {
+					TMUX=$_POWERLINE_TMUX tmux setenv -g TMUX_$1^_`{
+						TMUX=$_POWERLINE_TMUX tmux display -p '#D' | tr -d %
+					} $2
+				}
+			}
+			_powerline_common_setup
+		}
+	}
+}
+# vim: ft=rcshell

powerline/commands/main.py

@@ -10,6 +10,7 @@ from itertools import chain
 from powerline.lib.overrides import parsedotval, parse_override_var
 from powerline.lib.dict import mergeargs
 from powerline.lib.encoding import get_preferred_arguments_encoding
+from powerline.lib.unicode import u
 
 
 if sys.version_info < (3,):
@@ -55,6 +56,13 @@ def finish_args(environ, args):
 	return args
 
 
+def int_or_sig(s):
+	if s.startswith('sig'):
+		return u(s)
+	else:
+		return int(s)
+
+
 def get_argparser(ArgumentParser=argparse.ArgumentParser):
 	parser = ArgumentParser(description='Powerline prompt and statusline script.')
 	parser.add_argument('ext', nargs=1, help='Extension: application for which powerline command is launched (usually `shell\' or `tmux\').')
@@ -64,8 +72,8 @@ def get_argparser(ArgumentParser=argparse.ArgumentParser):
 		help='Renderer module. Usually something like `.bash\' or `.zsh\', is supposed to be set only in shell-specific bindings file.'
 	)
 	parser.add_argument('-w', '--width', type=int, help='Maximum prompt with. Triggers truncation of some segments.')
-	parser.add_argument('--last-exit-code', metavar='INT', type=int, help='Last exit code.')
-	parser.add_argument('--last-pipe-status', metavar='LIST', default='', type=lambda s: [int(status) for status in s.split()], help='Like above, but is supposed to contain space-separated array of statuses, representing exit statuses of commands in one pipe.')
+	parser.add_argument('--last-exit-code', metavar='INT', type=int_or_sig, help='Last exit code.')
+	parser.add_argument('--last-pipe-status', metavar='LIST', default='', type=lambda s: [int_or_sig(status) for status in s.split()], help='Like above, but is supposed to contain space-separated array of statuses, representing exit statuses of commands in one pipe.')
 	parser.add_argument('--jobnum', metavar='INT', type=int, help='Number of jobs.')
 	parser.add_argument('-c', '--config-override', metavar='KEY.KEY=VALUE', type=arg_to_unicode, action='append', help='Configuration overrides for `config.json\'. Is translated to a dictionary and merged with the dictionary obtained from actual JSON configuration: KEY.KEY=VALUE is translated to `{"KEY": {"KEY": VALUE}}\' and then merged recursively. VALUE may be any JSON value, values that are not `null\', `true\', `false\', start with digit, `{\', `[\' are treated like strings. If VALUE is omitted then corresponding key is removed.')
 	parser.add_argument('-t', '--theme-override', metavar='THEME.KEY.KEY=VALUE', type=arg_to_unicode, action='append', help='Like above, but theme-specific. THEME should point to an existing and used theme to have any effect, but it is fine to use any theme here.')

powerline/renderers/shell/rcsh.py

@@ -0,0 +1,12 @@
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
+from powerline.renderers.shell import ShellRenderer
+
+
+class RcshRenderer(ShellRenderer):
+	'''Powerline rcsh prompt renderer'''
+	escape_hl_start = '\x01'
+	escape_hl_end = '\x02'
+
+renderer = RcshRenderer

tests/install.sh

@@ -5,7 +5,7 @@ git clone --depth=1 git://github.com/powerline/deps tests/bot-ci/deps
 . tests/bot-ci/scripts/common/main.sh
 
 sudo apt-get install -qq libssl1.0.0
-sudo apt-get install -qq screen zsh tcsh mksh busybox socat realpath bc
+sudo apt-get install -qq screen zsh tcsh mksh busybox socat realpath bc rc
 
 if test -n "$USE_UCS2_PYTHON" ; then
 	pip install virtualenvwrapper

tests/test_cmdline.py

@@ -47,7 +47,7 @@ class TestParser(TestCase):
 				(['shell', '--renderer-arg'],            'expected one argument'),
 				(['shell', '--jobnum'],                  'expected one argument'),
 				(['-r', '.zsh'],                         'too few arguments|the following arguments are required: ext'),
-				(['shell', '--last-exit-code', 'i'],     'invalid int value'),
+				(['shell', '--last-exit-code', 'i'],     'invalid int_or_sig value'),
 				(['shell', '--last-pipe-status', '1 i'], 'invalid <lambda> value'),
 			]:
 				self.assertRaises(SystemExit, parser.parse_args, raising_args)

tests/test_segments.py

@@ -7,7 +7,7 @@ import os
 from functools import partial
 from collections import namedtuple
 
-from powerline.segments import shell, tmux, common
+from powerline.segments import shell, tmux
 from powerline.lib.vcs import get_fallback_create_watcher
 from powerline.lib.unicode import out_u
 
@@ -38,6 +38,14 @@ class TestShell(TestCase):
 		self.assertEqual(shell.last_status(pl=pl, segment_info=segment_info), None)
 		segment_info['args'].last_exit_code = None
 		self.assertEqual(shell.last_status(pl=pl, segment_info=segment_info), None)
+		segment_info['args'].last_exit_code = 'sigsegv'
+		self.assertEqual(shell.last_status(pl=pl, segment_info=segment_info), [
+			{'contents': 'sigsegv', 'highlight_groups': ['exit_fail']}
+		])
+		segment_info['args'].last_exit_code = 'sigsegv+core'
+		self.assertEqual(shell.last_status(pl=pl, segment_info=segment_info), [
+			{'contents': 'sigsegv+core', 'highlight_groups': ['exit_fail']}
+		])
 
 	def test_last_pipe_status(self):
 		pl = Pl()
@@ -51,6 +59,24 @@ class TestShell(TestCase):
 			{'contents': '2', 'highlight_groups': ['exit_fail'], 'draw_inner_divider': True},
 			{'contents': '0', 'highlight_groups': ['exit_success'], 'draw_inner_divider': True}
 		])
+		segment_info['args'].last_pipe_status = [0, 'sigsegv', 'sigsegv+core']
+		self.assertEqual(shell.last_pipe_status(pl=pl, segment_info=segment_info), [
+			{'contents': '0', 'highlight_groups': ['exit_success'], 'draw_inner_divider': True},
+			{'contents': 'sigsegv', 'highlight_groups': ['exit_fail'], 'draw_inner_divider': True},
+			{'contents': 'sigsegv+core', 'highlight_groups': ['exit_fail'], 'draw_inner_divider': True}
+		])
+		segment_info['args'].last_pipe_status = [0, 'sigsegv', 0]
+		self.assertEqual(shell.last_pipe_status(pl=pl, segment_info=segment_info), [
+			{'contents': '0', 'highlight_groups': ['exit_success'], 'draw_inner_divider': True},
+			{'contents': 'sigsegv', 'highlight_groups': ['exit_fail'], 'draw_inner_divider': True},
+			{'contents': '0', 'highlight_groups': ['exit_success'], 'draw_inner_divider': True}
+		])
+		segment_info['args'].last_pipe_status = [0, 'sigsegv+core', 0]
+		self.assertEqual(shell.last_pipe_status(pl=pl, segment_info=segment_info), [
+			{'contents': '0', 'highlight_groups': ['exit_success'], 'draw_inner_divider': True},
+			{'contents': 'sigsegv+core', 'highlight_groups': ['exit_fail'], 'draw_inner_divider': True},
+			{'contents': '0', 'highlight_groups': ['exit_success'], 'draw_inner_divider': True}
+		])
 
 	def test_jobnum(self):
 		pl = Pl()

tests/test_shells/input.rc

@@ -0,0 +1,32 @@
+fn set_theme_option {
+	POWERLINE_THEME_OVERRIDES = $POWERLINE_THEME_OVERRIDES';'$1'='$2
+}
+set_theme_option default_leftonly.segment_data.hostname.args.only_if_ssh false
+POWERLINE_CONFIG_OVERRIDES = 'ext.shell.theme=default_leftonly'
+. powerline/bindings/rc/powerline.rc
+VIRTUAL_ENV = ()
+cd tests/shell/3rd
+cd .git
+cd ..
+VIRTUAL_ENV = '/home/foo/.virtenvs/some-virtual-environment'
+VIRTUAL_ENV = ()
+bgscript.sh & waitpid.sh
+false
+kill `{cat pid} ; sleep 1s
+cd $DIR1
+cd ../$DIR2
+cd ../'\[\]'
+cd ../'%%'
+cd ../'#[bold]'
+cd ../'(echo)'
+cd ../'$(echo)'
+cd ../'`echo`'
+cd ../'«Unicode!»'
+false
+set_theme_option default_leftonly.segment_data.hostname.display false
+set_theme_option default_leftonly.segment_data.user.display false
+echo `{
+    echo Continuation!
+}
+true is the last line
+exit

tests/test_shells/rc.daemon.ok

@@ -0,0 +1,24 @@
+  HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  cd .git
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  .git  cd ..
+  HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  VIRTUAL_ENV = '/home/foo/.virtenvs/some-virtual-environment'
+  HOSTNAME  USER  ⓔ  some-virtual-environment   BRANCH  ⋯  tests  shell  3rd  VIRTUAL_ENV = ()
+  HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  bgscript.sh & waitpid.sh
+PID
+  HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  1  false
+  HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  1  1  kill `{cat pid} ; sleep 1s
+  HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  cd $DIR1
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  ^[[32m  cd ../$DIR2
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  ^H  cd ../'\[\]'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  \[\]  cd ../'%%'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  %%  cd ../'#[bold]'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  #[bold]  cd ../'(echo)'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  (echo)  cd ../'$(echo)'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  $(echo)  cd ../'`echo`'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  `echo`  cd ../'«Unicode!»'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  «Unicode!»  false
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  «Unicode!»  1  set_theme_option default_leftonly.segment_data.hostname.display false
+ USER   BRANCH  ⋯  shell  3rd  «Unicode!»  set_theme_option default_leftonly.segment_data.user.display false
+  BRANCH  ⋯  shell  3rd  «Unicode!»  echo `{
+                                              echo Continuation!
+                                          }
+Continuation!

tests/test_shells/rc.nodaemon.ok

@@ -0,0 +1,24 @@
+  HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  cd .git
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  .git  cd ..
+  HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  VIRTUAL_ENV = '/home/foo/.virtenvs/some-virtual-environment'
+  HOSTNAME  USER  ⓔ  some-virtual-environment   BRANCH  ⋯  tests  shell  3rd  VIRTUAL_ENV = ()
+  HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  bgscript.sh & waitpid.sh
+PID
+  HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  1  false
+  HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  1  1  kill `{cat pid} ; sleep 1s
+  HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  cd $DIR1
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  ^[[32m  cd ../$DIR2
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  ^H  cd ../'\[\]'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  \[\]  cd ../'%%'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  %%  cd ../'#[bold]'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  #[bold]  cd ../'(echo)'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  (echo)  cd ../'$(echo)'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  $(echo)  cd ../'`echo`'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  `echo`  cd ../'«Unicode!»'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  «Unicode!»  false
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  «Unicode!»  1  set_theme_option default_leftonly.segment_data.hostname.display false
+ USER   BRANCH  ⋯  shell  3rd  «Unicode!»  set_theme_option default_leftonly.segment_data.user.display false
+  BRANCH  ⋯  shell  3rd  «Unicode!»  echo `{
+       echo Continuation!
+   }
+Continuation!

tests/test_shells/test.sh

@@ -233,6 +233,8 @@ ln -s "$(which grep)" tests/shell/path
 ln -s "$(which sed)" tests/shell/path
 ln -s "$(which rm)" tests/shell/path
 ln -s "$(which uname)" tests/shell/path
+ln -s "$(which test)" tests/shell/path
+ln -s "$(which pwd)" tests/shell/path
 ln -s ../../test_shells/bgscript.sh tests/shell/path
 ln -s ../../test_shells/waitpid.sh tests/shell/path
 if which socat ; then
@@ -249,6 +251,20 @@ for pexe in powerline powerline-config ; do
 	fi
 done
 
+if test -z "$POWERLINE_RC_EXE" ; then
+	if which rc-status >/dev/null ; then
+		# On Gentoo `rc` executable is from OpenRC. Thus app-shells/rc instals 
+		# `rcsh` executable.
+		POWERLINE_RC_EXE=rcsh
+	else
+		POWERLINE_RC_EXE=rc
+	fi
+fi
+
+if which "$POWERLINE_RC_EXE" >/dev/null ; then
+	ln -s "$(which $POWERLINE_RC_EXE)" tests/shell/path/rc
+fi
+
 for exe in bash zsh busybox fish tcsh mksh dash ipython ; do
 	if which $exe >/dev/null ; then
 		ln -s "$(which $exe)" tests/shell/path
@@ -261,7 +277,7 @@ export ADDRESS="powerline-ipc-test-$$"
 export PYTHON
 echo "Powerline address: $ADDRESS"
 
-if test -z "${ONLY_SHELL}" || test "x${ONLY_SHELL%sh}" != "x${ONLY_SHELL}" || test "x${ONLY_SHELL}" = xbusybox ; then
+if test -z "${ONLY_SHELL}" || test "x${ONLY_SHELL%sh}" != "x${ONLY_SHELL}" || test "x${ONLY_SHELL}" = xbusybox || test "x${ONLY_SHELL}" = xrc ; then
 	scripts/powerline-config shell command
 
 	for TEST_TYPE in "daemon" "nodaemon" ; do
@@ -327,7 +343,8 @@ if test -z "${ONLY_SHELL}" || test "x${ONLY_SHELL%sh}" != "x${ONLY_SHELL}" || te
 				"tcsh -f -i" \
 				"busybox ash -i" \
 				"mksh -i" \
-				"dash -i"
+				"dash -i" \
+				"rc -i -p"
 			do
 				J="$(( J + 1 ))"
 				if test x$FAST = x1 ; then
@@ -343,10 +360,10 @@ if test -z "${ONLY_SHELL}" || test "x${ONLY_SHELL%sh}" != "x${ONLY_SHELL}" || te
 				if test "x$ONLY_SHELL" != "x" && test "x$ONLY_SHELL" != "x$SH" ; then
 					continue
 				fi
-				if ! which $SH >/dev/null ; then
+				if ! test -x tests/shell/path/$SH ; then
 					continue
 				fi
-				echo ">>> $(which $SH)"
+				echo ">>> $(readlink "tests/shell/path/$SH")"
 				if ! run_test $TEST_TYPE $TEST_CLIENT $TEST_COMMAND ; then
 					FAILED=1
 					FAIL_SUMMARY="${FAIL_SUMMARY}${NL}T ${TEST_TYPE} ${TEST_CLIENT} ${TEST_COMMAND}"