util: add bash completion script

Add a bash script for the flashrom CLI that auto-completes the command
sequence. The script is generated from a template by substituting a
list of enabled programmers. It requires an extra `bash-completion`
package to work, but, fortunately, it's installed on most systems.

Build system changes:

  meson:
   provide option `bash_completion` to determine if the script should
   be installed (depends on option `classic_cli`).

  makefile:
   make a list of enabled programmers (by using CONFIG_* variables)
   to do substitution manually

Change-Id: Ie68bc91c3cea4de2ffdbeffd07e48edd8d5590e1
Signed-off-by: Alexander Goncharov <chat@joursoir.net>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/68247
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
---
M .gitignore
M Makefile
M meson.build
M meson_options.txt
A util/flashrom.bash-completion.tmpl
5 files changed, 192 insertions(+), 2 deletions(-)

diff --git a/.gitignore b/.gitignore
index 8a32a70..1aa73d2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,7 @@
 /flashrom-*
 /flashrom.exe
 /flashrom.8
+/flashrom.bash
 /libflashrom.a
 /libflashrom-doc/
 
diff --git a/Makefile b/Makefile
index 425b58c..a7ab00b 100644
--- a/Makefile
+++ b/Makefile
@@ -30,6 +30,7 @@
 INSTALL = install
 PREFIX  ?= /usr/local
 MANDIR  ?= $(PREFIX)/share/man
+BASHCOMPDIR ?= $(PREFIX)/share/bash-completion/completions
 CFLAGS  ?= -Os -Wall -Wextra -Wno-unused-parameter -Wshadow -Wmissing-prototypes -Wwrite-strings
 EXPORTDIR ?= .
 RANLIB  ?= ranlib
@@ -585,11 +586,13 @@
 PROGRAMMER_OBJS += processor_enable.o chipset_enable.o board_enable.o cbtable.o \
 	internal.o it87spi.o sb600spi.o amd_imc.o wbsio_spi.o mcp6x_spi.o \
 	ichspi.o dmi.o known_boards.o
+ACTIVE_PROGRAMMERS += internal
 endif
 else
 ifeq ($(CONFIG_INTERNAL), yes)
 FEATURE_FLAGS += -D'CONFIG_INTERNAL=1'
 PROGRAMMER_OBJS += processor_enable.o chipset_enable.o board_enable.o cbtable.o internal.o known_boards.o
+ACTIVE_PROGRAMMERS += internal
 endif
 endif
 
@@ -600,191 +603,229 @@
 ifeq ($(CONFIG_SERPROG), yes)
 FEATURE_FLAGS += -D'CONFIG_SERPROG=1'
 PROGRAMMER_OBJS += serprog.o
+ACTIVE_PROGRAMMERS += serprog
 endif
 
 ifeq ($(CONFIG_RAYER_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_RAYER_SPI=1'
 PROGRAMMER_OBJS += rayer_spi.o
+ACTIVE_PROGRAMMERS += rayer_spi
 endif
 
 ifeq ($(CONFIG_RAIDEN_DEBUG_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_RAIDEN_DEBUG_SPI=1'
 PROGRAMMER_OBJS += raiden_debug_spi.o
+ACTIVE_PROGRAMMERS += raiden_debug_spi
 endif
 
 ifeq ($(CONFIG_PONY_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_PONY_SPI=1'
 PROGRAMMER_OBJS += pony_spi.o
+ACTIVE_PROGRAMMERS += pony_spi
 endif
 
 ifeq ($(CONFIG_NIC3COM), yes)
 FEATURE_FLAGS += -D'CONFIG_NIC3COM=1'
 PROGRAMMER_OBJS += nic3com.o
+ACTIVE_PROGRAMMERS += nic3com
 endif
 
 ifeq ($(CONFIG_GFXNVIDIA), yes)
 FEATURE_FLAGS += -D'CONFIG_GFXNVIDIA=1'
 PROGRAMMER_OBJS += gfxnvidia.o
+ACTIVE_PROGRAMMERS += gfxnvidia
 endif
 
 ifeq ($(CONFIG_SATASII), yes)
 FEATURE_FLAGS += -D'CONFIG_SATASII=1'
 PROGRAMMER_OBJS += satasii.o
+ACTIVE_PROGRAMMERS += satasii
 endif
 
 ifeq ($(CONFIG_ATAHPT), yes)
 FEATURE_FLAGS += -D'CONFIG_ATAHPT=1'
 PROGRAMMER_OBJS += atahpt.o
+ACTIVE_PROGRAMMERS += atahpt
 endif
 
 ifeq ($(CONFIG_ATAVIA), yes)
 FEATURE_FLAGS += -D'CONFIG_ATAVIA=1'
 PROGRAMMER_OBJS += atavia.o
+ACTIVE_PROGRAMMERS += atavia
 endif
 
 ifeq ($(CONFIG_ATAPROMISE), yes)
 FEATURE_FLAGS += -D'CONFIG_ATAPROMISE=1'
 PROGRAMMER_OBJS += atapromise.o
+ACTIVE_PROGRAMMERS += atapromise
 endif
 
 ifeq ($(CONFIG_IT8212), yes)
 FEATURE_FLAGS += -D'CONFIG_IT8212=1'
 PROGRAMMER_OBJS += it8212.o
+ACTIVE_PROGRAMMERS += it8212
 endif
 
 ifeq ($(CONFIG_FT2232_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_FT2232_SPI=1'
 PROGRAMMER_OBJS += ft2232_spi.o
+ACTIVE_PROGRAMMERS += ft2232_spi
 endif
 
 ifeq ($(CONFIG_USBBLASTER_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_USBBLASTER_SPI=1'
 PROGRAMMER_OBJS += usbblaster_spi.o
+ACTIVE_PROGRAMMERS += usbblaster_spi
 endif
 
 ifeq ($(CONFIG_PICKIT2_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_PICKIT2_SPI=1'
 PROGRAMMER_OBJS += pickit2_spi.o
+ACTIVE_PROGRAMMERS += pickit2_spi
 endif
 
 ifeq ($(CONFIG_STLINKV3_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_STLINKV3_SPI=1'
 PROGRAMMER_OBJS += stlinkv3_spi.o
+ACTIVE_PROGRAMMERS += stlinkv3_spi
 endif
 
 ifeq ($(CONFIG_PARADE_LSPCON), yes)
 FEATURE_FLAGS += -D'CONFIG_PARADE_LSPCON=1'
 PROGRAMMER_OBJS += parade_lspcon.o
+ACTIVE_PROGRAMMERS += parade_lspcon
 endif
 
 ifeq ($(CONFIG_MEDIATEK_I2C_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_MEDIATEK_I2C_SPI=1'
 PROGRAMMER_OBJS += mediatek_i2c_spi.o
+ACTIVE_PROGRAMMERS += mediatek_i2c_spi
 endif
 
 ifeq ($(CONFIG_REALTEK_MST_I2C_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_REALTEK_MST_I2C_SPI=1'
 PROGRAMMER_OBJS += realtek_mst_i2c_spi.o
+ACTIVE_PROGRAMMERS += realtek_mst_i2c_spi
 endif
 
 ifeq ($(CONFIG_DUMMY), yes)
 FEATURE_FLAGS += -D'CONFIG_DUMMY=1'
 PROGRAMMER_OBJS += dummyflasher.o
+ACTIVE_PROGRAMMERS += dummyflasher
 endif
 
 ifeq ($(CONFIG_DRKAISER), yes)
 FEATURE_FLAGS += -D'CONFIG_DRKAISER=1'
 PROGRAMMER_OBJS += drkaiser.o
+ACTIVE_PROGRAMMERS += drkaiser
 endif
 
 ifeq ($(CONFIG_NICREALTEK), yes)
 FEATURE_FLAGS += -D'CONFIG_NICREALTEK=1'
 PROGRAMMER_OBJS += nicrealtek.o
+ACTIVE_PROGRAMMERS += nicrealtek
 endif
 
 ifeq ($(CONFIG_NICNATSEMI), yes)
 FEATURE_FLAGS += -D'CONFIG_NICNATSEMI=1'
 PROGRAMMER_OBJS += nicnatsemi.o
+ACTIVE_PROGRAMMERS += nicnatsemi
 endif
 
 ifeq ($(CONFIG_NICINTEL), yes)
 FEATURE_FLAGS += -D'CONFIG_NICINTEL=1'
 PROGRAMMER_OBJS += nicintel.o
+ACTIVE_PROGRAMMERS += nicintel
 endif
 
 ifeq ($(CONFIG_NICINTEL_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_NICINTEL_SPI=1'
 PROGRAMMER_OBJS += nicintel_spi.o
+ACTIVE_PROGRAMMERS += nicintel_spi
 endif
 
 ifeq ($(CONFIG_NICINTEL_EEPROM), yes)
 FEATURE_FLAGS += -D'CONFIG_NICINTEL_EEPROM=1'
 PROGRAMMER_OBJS += nicintel_eeprom.o
+ACTIVE_PROGRAMMERS += nicintel_eeprom
 endif
 
 ifeq ($(CONFIG_OGP_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_OGP_SPI=1'
 PROGRAMMER_OBJS += ogp_spi.o
+ACTIVE_PROGRAMMERS += ogp_spi
 endif
 
 ifeq ($(CONFIG_BUSPIRATE_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_BUSPIRATE_SPI=1'
 PROGRAMMER_OBJS += buspirate_spi.o
+ACTIVE_PROGRAMMERS += buspirate_spi
 endif
 
 ifeq ($(CONFIG_DEDIPROG), yes)
 FEATURE_FLAGS += -D'CONFIG_DEDIPROG=1'
 PROGRAMMER_OBJS += dediprog.o
+ACTIVE_PROGRAMMERS += dediprog
 endif
 
 ifeq ($(CONFIG_DEVELOPERBOX_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_DEVELOPERBOX_SPI=1'
 PROGRAMMER_OBJS += developerbox_spi.o
+ACTIVE_PROGRAMMERS += developerbox_spi
 endif
 
 ifeq ($(CONFIG_SATAMV), yes)
 FEATURE_FLAGS += -D'CONFIG_SATAMV=1'
 PROGRAMMER_OBJS += satamv.o
+ACTIVE_PROGRAMMERS += satamv
 endif
 
 ifeq ($(CONFIG_LINUX_MTD), yes)
 FEATURE_FLAGS += -D'CONFIG_LINUX_MTD=1'
 PROGRAMMER_OBJS += linux_mtd.o
+ACTIVE_PROGRAMMERS += linux_mtd
 endif
 
 ifeq ($(CONFIG_LINUX_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_LINUX_SPI=1'
 PROGRAMMER_OBJS += linux_spi.o
+ACTIVE_PROGRAMMERS += linux_spi
 endif
 
 ifeq ($(CONFIG_MSTARDDC_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_MSTARDDC_SPI=1'
 PROGRAMMER_OBJS += mstarddc_spi.o
+ACTIVE_PROGRAMMERS += mstarddc_spi
 endif
 
 ifeq ($(CONFIG_CH341A_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_CH341A_SPI=1'
 PROGRAMMER_OBJS += ch341a_spi.o
+ACTIVE_PROGRAMMERS += ch341a_spi
 endif
 
 ifeq ($(CONFIG_DIGILENT_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_DIGILENT_SPI=1'
 PROGRAMMER_OBJS += digilent_spi.o
+ACTIVE_PROGRAMMERS += digilent_spi
 endif
 
 ifeq ($(CONFIG_DIRTYJTAG_SPI), yes)
 FEATURE_CFLAGS += -D'CONFIG_DIRTYJTAG_SPI=1'
 PROGRAMMER_OBJS += dirtyjtag_spi.o
+ACTIVE_PROGRAMMERS += dirtyjtag_spi
 endif
 
 ifeq ($(CONFIG_JLINK_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_JLINK_SPI=1'
 PROGRAMMER_OBJS += jlink_spi.o
+ACTIVE_PROGRAMMERS += jlink_spi
 endif
 
 ifeq ($(CONFIG_NI845X_SPI), yes)
 FEATURE_FLAGS += -D'CONFIG_NI845X_SPI=1'
 PROGRAMMER_OBJS += ni845x_spi.o
+ACTIVE_PROGRAMMERS += ni845x_spi
 endif
 
 USE_BITBANG_SPI := $(if $(call filter_deps,$(DEPENDS_ON_BITBANG_SPI)),yes,no)
@@ -976,6 +1017,10 @@
 	@# Add the man page change date and version to the man page
 	@sed -e 's#.TH FLASHROM 8 .*#.TH FLASHROM 8 "$(MAN_DATE)" "$(VERSION)" "$(MAN_DATE)"#' <$< >$@
 
+$(PROGRAM).bash: util/$(PROGRAM).bash-completion.tmpl
+	@# Add to the bash completion file a list of enabled programmers.
+	sed -e 's/@PROGRAMMERS@/$(ACTIVE_PROGRAMMERS)/g' <$< >$@
+
 strip: $(PROGRAM)$(EXEC_SUFFIX)
 	$(STRIP) $(STRIP_ARGS) $(PROGRAM)$(EXEC_SUFFIX)
 
@@ -984,14 +1029,16 @@
 # We don't use EXEC_SUFFIX here because we want to clean everything.
 clean:
 	rm -f $(PROGRAM) $(PROGRAM).exe libflashrom.a $(filter-out Makefile.d, $(wildcard *.d *.o platform/*.d platform/*.o)) \
-		$(PROGRAM).8 $(PROGRAM).8.html $(BUILD_DETAILS_FILE)
+		$(PROGRAM).8 $(PROGRAM).8.html $(PROGRAM).bash $(BUILD_DETAILS_FILE)
 	@+$(MAKE) -C util/ich_descriptors_tool/ clean
 
-install: $(PROGRAM)$(EXEC_SUFFIX) $(PROGRAM).8
+install: $(PROGRAM)$(EXEC_SUFFIX) $(PROGRAM).8 $(PROGRAM).bash
 	mkdir -p $(DESTDIR)$(PREFIX)/sbin
 	mkdir -p $(DESTDIR)$(MANDIR)/man8
+	mkdir -p $(DESTDIR)$(BASHCOMPDIR)
 	$(INSTALL) -m 0755 $(PROGRAM)$(EXEC_SUFFIX) $(DESTDIR)$(PREFIX)/sbin
 	$(INSTALL) -m 0644 $(PROGRAM).8 $(DESTDIR)$(MANDIR)/man8
+	$(INSTALL) -m 0644 $(PROGRAM).bash $(DESTDIR)$(BASHCOMPDIR)
 
 libinstall: libflashrom.a include/libflashrom.h
 	mkdir -p $(DESTDIR)$(PREFIX)/lib
diff --git a/meson.build b/meson.build
index 27a284e..36cb4f8 100644
--- a/meson.build
+++ b/meson.build
@@ -630,6 +630,41 @@
   subdir('util/ich_descriptors_tool')
 endif
 
+if get_option('bash_completion').auto() or get_option('bash_completion').enabled()
+  if get_option('classic_cli').disabled()
+    if get_option('bash_completion').enabled()
+      error('`bash_completion` can not be enabled without `classic_cli`')
+    endif
+  else
+    bash_comp = dependency('bash-completion', required : false)
+    if bash_comp.found()
+      bash_comp_install_dir = bash_comp.get_variable(
+        pkgconfig : 'completionsdir',
+        pkgconfig_define : ['datadir', get_option('datadir')]
+      )
+    else
+      bash_comp_install_dir = join_paths(get_option('datadir'), 'bash-completion', 'completions')
+    endif
+
+    programmer_names_active_str = ''
+    foreach p_name, p_data : programmer
+      if p_data.get('active')
+        programmer_names_active_str += p_name + ' '
+      endif
+    endforeach
+
+    configure_file(
+      input : 'util/flashrom.bash-completion.tmpl',
+      output : 'flashrom.bash',
+      configuration : {
+        'PROGRAMMERS' : programmer_names_active_str,
+      },
+      install: true,
+      install_dir: bash_comp_install_dir,
+    )
+  endif
+endif
+
 # Use `.auto() or .enabled()` instead of `.allowed()` to keep the minimum meson version as low as possible.
 # `.allowed()` gets introduced in 0.59.0
 if get_option('tests').auto() or get_option('tests').enabled()
diff --git a/meson_options.txt b/meson_options.txt
index 1990d0a..9dcebdc 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -3,6 +3,7 @@
 option('default_programmer_name', type : 'string', description : 'default programmer')
 option('default_programmer_args', type : 'string', description : 'default programmer arguments')
 option('ich_descriptors_tool', type : 'feature', value : 'auto', description : 'Build ich_descriptors_tool')
+option('bash_completion', type : 'feature', value : 'auto', description : 'Install bash completion')
 option('tests', type : 'feature', value : 'auto', description : 'Build unit tests')
 option('use_internal_dmi', type : 'boolean', value : 'true')
 option('programmer', type : 'array', value : ['auto'], choices : [
diff --git a/util/flashrom.bash-completion.tmpl b/util/flashrom.bash-completion.tmpl
new file mode 100644
index 0000000..afb7ae9
--- /dev/null
+++ b/util/flashrom.bash-completion.tmpl
@@ -0,0 +1,77 @@
+# Completion file for bash
+#
+# This file is part of the flashrom project.
+#
+# Copyright 2022 Alexander Goncharov <chat@joursoir.net>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+
+_flashrom()
+{
+	local cur prev OPTS
+	COMPREPLY=()
+	cur="${COMP_WORDS[COMP_CWORD]}"
+	prev="${COMP_WORDS[COMP_CWORD-1]}"
+	case $prev in
+		'-r'|'--read'|'-w'|'--write'|'-v'|'--verify'|'-l'|'--layout'| \
+		'--fmap-file'|'-o'|'--output'|'--flash-contents')
+			local IFS=$'\n'
+			compopt -o filenames
+			COMPREPLY=( $(compgen -f -- $cur) )
+			return 0
+			;;
+		'-c'|'--chip'|'--wp-range'|'--wp-region'|'-i'|'--include')
+			return 0
+			;;
+		'-p'|'--programmer')
+			COMPREPLY=( $(compgen -W "@PROGRAMMERS@" -- $cur) )
+			return 0
+			;;
+		'-h'|'--help'|'-R'|'--version'|'-L'|'--list-supported')
+			return 0
+			;;
+	esac
+	OPTS="--help
+		--version
+		--read
+		--write
+		--verify
+		--erase
+		--verbose
+		--chip
+		--force
+		--noverify
+		--noverify-all
+		--extract
+		--layout
+		--wp-disable
+		--wp-enable
+		--wp-list
+		--wp-status
+		--wp-range
+		--wp-region
+		--flash-name
+		--flash-size
+		--fmap
+		--fmap-file
+		--ifd
+		--include
+		--output
+		--flash-contents
+		--list-supported
+		--progress
+		--programmer"
+	COMPREPLY=( $(compgen -W "${OPTS[*]}" -- $cur) )
+	return 0
+}
+
+complete -F _flashrom flashrom

