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autosetup
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executable file
·2544 lines (2272 loc) · 61.7 KB
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#!/bin/sh
# Copyright (c) 2006-2011 WorkWare Systems http://www.workware.net.au/
# All rights reserved
# vim:se syntax=tcl:
# \
dir=`dirname "$0"`; exec "`$dir/autosetup-find-tclsh`" "$0" "$@"
# Note that the version has a trailing + on unreleased versions
set autosetup(version) 0.7.2
# Can be set to 1 to debug early-init problems
set autosetup(debug) [expr {"--autosetup-debug" in $argv}]
##################################################################
#
# Main flow of control, option handling
#
proc main {argv} {
global autosetup define
# There are 3 potential directories involved:
# 1. The directory containing autosetup (this script)
# 2. The directory containing auto.def
# 3. The current directory
# From this we need to determine:
# a. The path to this script (and related support files)
# b. The path to auto.def
# c. The build directory, where output files are created
# This is also complicated by the fact that autosetup may
# have been run via the configure wrapper ([getenv WRAPPER] is set)
# Here are the rules.
# a. This script is $::argv0
# => dir, prog, exe, libdir
# b. auto.def is in the directory containing the configure wrapper,
# otherwise it is in the current directory.
# => srcdir, autodef
# c. The build directory is the current directory
# => builddir, [pwd]
# 'misc' is needed before we can do anything, so set a temporary libdir
# in case this is the development version
set autosetup(libdir) [file dirname $::argv0]/lib
use misc
# (a)
set autosetup(dir) [realdir [file dirname [realpath $::argv0]]]
set autosetup(prog) [file join $autosetup(dir) [file tail $::argv0]]
set autosetup(exe) [getenv WRAPPER $autosetup(prog)]
if {$autosetup(installed)} {
set autosetup(libdir) $autosetup(dir)
} else {
set autosetup(libdir) [file join $autosetup(dir) lib]
}
autosetup_add_dep $autosetup(prog)
# (b)
if {[getenv WRAPPER ""] eq ""} {
# Invoked directly
set autosetup(srcdir) [pwd]
} else {
# Invoked via the configure wrapper
set autosetup(srcdir) [file-normalize [file dirname $autosetup(exe)]]
}
set autosetup(autodef) [relative-path $autosetup(srcdir)/auto.def]
# (c)
set autosetup(builddir) [pwd]
set autosetup(argv) $argv
set autosetup(cmdline) {}
# options is a list of known options
set autosetup(options) {}
# optset is a dictionary of option values set by the user based on getopt
set autosetup(optset) {}
# optdefault is a dictionary of default values
set autosetup(optdefault) {}
# options-defaults is a dictionary of overrides for default values for options
set autosetup(options-defaults) {}
set autosetup(optionhelp) {}
set autosetup(showhelp) 0
use util
# Parse options
use getopt
# At the is point we don't know what is a valid option
# We simply parse anything that looks like an option
set autosetup(getopt) [getopt argv]
#"=Core Options:"
options-add {
help:=all => "display help and options. Optional: module name, such as --help=system"
licence license => "display the autosetup license"
version => "display the version of autosetup"
ref:=text manual:=text
reference:=text => "display the autosetup command reference. 'text', 'wiki', 'asciidoc' or 'markdown'"
autosetup-debug => "display debugging output as autosetup runs"
install:=. => "install autosetup to the current or given directory"
}
if {$autosetup(installed)} {
# hidden options so we can produce a nice error
options-add {
sysinstall:path
}
} else {
options-add {
sysinstall:path => "install standalone autosetup to the given directory (e.g.: /usr/local)"
}
}
options-add {
force init:=help => "create initial auto.def, etc. Use --init=help for known types"
# Undocumented options
option-checking=1
nopager
quiet
timing
conf:
}
if {[opt-bool version]} {
puts $autosetup(version)
exit 0
}
# autosetup --conf=alternate-auto.def
if {[opt-str conf o]} {
set autosetup(autodef) $o
}
# Debugging output (set this early)
incr autosetup(debug) [opt-bool autosetup-debug]
incr autosetup(force) [opt-bool force]
incr autosetup(msg-quiet) [opt-bool quiet]
incr autosetup(msg-timing) [opt-bool timing]
# If the local module exists, source it now to allow for
# project-local customisations
if {[file exists $autosetup(libdir)/local.tcl]} {
use local
}
# Now any auto-load modules
autosetup_load_auto_modules
if {[opt-str help o]} {
incr autosetup(showhelp)
use help
autosetup_help $o
}
if {[opt-bool licence license]} {
use help
autosetup_show_license
exit 0
}
if {[opt-str {manual ref reference} o]} {
use help
autosetup_reference $o
}
# Allow combining --install and --init
set earlyexit 0
if {[opt-str install o]} {
use install
autosetup_install $o
incr earlyexit
}
if {[opt-str init o]} {
use init
autosetup_init $o
incr earlyexit
}
if {$earlyexit} {
exit 0
}
if {[opt-str sysinstall o]} {
use install
autosetup_install $o 1
exit 0
}
if {![file exists $autosetup(autodef)]} {
# Check for invalid option first
options {}
user-error "No auto.def found in \"$autosetup(srcdir)\" (use [file tail $::autosetup(exe)] --init to create one)"
}
# Parse extra arguments into autosetup(cmdline)
foreach arg $argv {
if {[regexp {([^=]*)=(.*)} $arg -> n v]} {
dict set autosetup(cmdline) $n $v
define $n $v
} else {
user-error "Unexpected parameter: $arg"
}
}
autosetup_add_dep $autosetup(autodef)
# Add $argv to CONFIGURE_OPTS
define-append-argv CONFIGURE_OPTS {*}$autosetup(argv)
# Set up AUTOREMAKE to reconfigure with the same args
define-append-argv AUTOREMAKE {*}$autosetup(exe) {*}$autosetup(argv)
# Log how we were invoked
configlog "Invoked as: [getenv WRAPPER $::argv0] [quote-argv $autosetup(argv)]"
configlog "Tclsh: [info nameofexecutable]"
# Load auto.def as module "auto.def"
autosetup_load_module auto.def source $autosetup(autodef)
# Could warn here if options {} was not specified
show-notices
if {$autosetup(debug)} {
msg-result "Writing all defines to config.log"
configlog "================ defines ======================"
foreach n [lsort [array names define]] {
configlog "define $n $define($n)"
}
}
exit 0
}
# @section Option Handling
# @opt-bool ?-nodefault? option ...
#
# Check each of the named, boolean options and if any have been explicitly enabled
# or disabled by the user, return 1 or 0 accordingly.
#
# If the option was specified more than once, the last value wins.
# e.g. With '--enable-foo --disable-foo', '[opt-bool foo]' will return 0
#
# If no value was specified by the user, returns the default value for the
# first option. If '-nodefault' is given, this behaviour changes and
# -1 is returned instead.
#
proc opt-bool {args} {
set nodefault 0
if {[lindex $args 0] eq "-nodefault"} {
set nodefault 1
set args [lrange $args 1 end]
}
option-check-names {*}$args
foreach opt $args {
if {[dict exists $::autosetup(optset) $opt]} {
return [dict get $::autosetup(optset) $opt]
}
}
if {$nodefault} {
return -1
}
# Default value is the default for the first option
return [dict get $::autosetup(optdefault) [lindex $args 0]]
}
# @opt-val optionlist ?default=""?
#
# Returns a list containing all the values given for the non-boolean options in '$optionlist'.
# There will be one entry in the list for each option given by the user, including if the
# same option was used multiple times.
#
# If no options were set, '$default' is returned (exactly, not as a list).
#
# Note: For most use cases, 'opt-str' should be preferred.
#
proc opt-val {names {default ""}} {
option-check-names {*}$names
foreach opt $names {
if {[dict exists $::autosetup(optset) $opt]} {
lappend result {*}[dict get $::autosetup(optset) $opt]
}
}
if {[info exists result]} {
return $result
}
return $default
}
# @opt-str optionlist varname ?default?
#
# Sets '$varname' in the callers scope to the value for one of the given options.
#
# For the list of options given in '$optionlist', if any value is set for any option,
# the option value is taken to be the *last* value of the last option (in the order given).
#
# If no option was given, and a default was specified with 'options-defaults',
# that value is used.
#
# If no 'options-defaults' value was given and '$default' was given, it is used.
#
# If none of the above provided a value, no value is set.
#
# The return value depends on whether '$default' was specified.
# If it was, the option value is returned.
# If it was not, 1 is returns if a value was set, or 0 if not.
#
# Typical usage is as follows:
#
## if {[opt-str {myopt altname} o]} {
## do something with $o
## }
#
# Or:
## define myname [opt-str {myopt altname} o "/usr/local"]
#
proc opt-str {names varname args} {
global autosetup
option-check-names {*}$names
upvar $varname value
if {[llength $args]} {
# A default was given, so always return the string value of the option
set default [lindex $args 0]
set retopt 1
} else {
# No default, so return 0 or 1 to indicate if a value was found
set retopt 0
}
foreach opt $names {
if {[dict exists $::autosetup(optset) $opt]} {
set result [lindex [dict get $::autosetup(optset) $opt] end]
}
}
if {![info exists result]} {
# No user-specified value. Has options-defaults been set?
foreach opt $names {
if {[dict exists $::autosetup(optdefault) $opt]} {
set result [dict get $autosetup(optdefault) $opt]
}
}
}
if {[info exists result]} {
set value $result
if {$retopt} {
return $value
}
return 1
}
if {$retopt} {
set value $default
return $value
}
return 0
}
proc option-check-names {args} {
foreach o $args {
if {$o ni $::autosetup(options)} {
autosetup-error "Request for undeclared option --$o"
}
}
}
# Parse the option definition in $opts and update
# ::autosetup(setoptions) and ::autosetup(optionhelp) appropriately
#
proc options-add {opts} {
global autosetup
# First weed out comment lines
set realopts {}
foreach line [split $opts \n] {
if {![string match "#*" [string trimleft $line]]} {
append realopts $line \n
}
}
set opts $realopts
for {set i 0} {$i < [llength $opts]} {incr i} {
set opt [lindex $opts $i]
if {[string match =* $opt]} {
# This is a special heading
lappend autosetup(optionhelp) [list $opt $autosetup(module)]
continue
}
unset -nocomplain defaultvalue equal value
#puts "i=$i, opt=$opt"
regexp {^([^:=]*)(:)?(=)?(.*)$} $opt -> name colon equal value
if {$name in $autosetup(options)} {
autosetup-error "Option $name already specified"
}
#puts "$opt => $name $colon $equal $value"
# Find the corresponding value in the user options
# and set the default if necessary
if {[string match "-*" $opt]} {
# We no longer support documentation-only options, like "-C <dir>"
autosetup-error "Option $opt is not supported"
} elseif {$colon eq ""} {
# Boolean option
lappend autosetup(options) $name
# Check for override
if {[dict exists $autosetup(options-defaults) $name]} {
# A default was specified with options-defaults, so use it
set value [dict get $autosetup(options-defaults) $name]
}
if {$value eq "1"} {
set opthelp "--disable-$name"
} else {
set opthelp "--$name"
}
# Set the default
if {$value eq ""} {
set value 0
}
set defaultvalue $value
dict set autosetup(optdefault) $name $defaultvalue
if {[dict exists $autosetup(getopt) $name]} {
# The option was specified by the user. Look at the last value.
lassign [lindex [dict get $autosetup(getopt) $name] end] type setvalue
if {$type eq "str"} {
# Can we convert the value to a boolean?
if {$setvalue in {1 enabled yes}} {
set setvalue 1
} elseif {$setvalue in {0 disabled no}} {
set setvalue 0
} else {
user-error "Boolean option $name given as --$name=$setvalue"
}
}
dict set autosetup(optset) $name $setvalue
#puts "Found boolean option --$name=$setvalue"
}
} else {
# String option.
lappend autosetup(options) $name
if {$equal ne "="} {
# Was the option given as "name:value=default"?
# If so, set $value to the display name and $defaultvalue to the default
# (This is the preferred way to set a default value for a string option)
if {[regexp {^([^=]+)=(.*)$} $value -> value defaultvalue]} {
dict set autosetup(optdefault) $name $defaultvalue
}
}
# Maybe override the default value
if {[dict exists $autosetup(options-defaults) $name]} {
# A default was specified with options-defaults, so use it
set defaultvalue [dict get $autosetup(options-defaults) $name]
dict set autosetup(optdefault) $name $defaultvalue
} elseif {![info exists defaultvalue]} {
# No default value was given by value=default or options-defaults
# so use the value as the default when the plain option with no
# value is given (.e.g. just --opt instead of --opt=value)
set defaultvalue $value
}
if {$equal eq "="} {
# String option with optional value
set opthelp "--$name?=$value?"
} else {
# String option with required value
set opthelp "--$name=$value"
}
# Get the values specified by the user
if {[dict exists $autosetup(getopt) $name]} {
set listvalue {}
foreach pair [dict get $autosetup(getopt) $name] {
lassign $pair type setvalue
if {$type eq "bool" && $setvalue} {
if {$equal ne "="} {
user-error "Option --$name requires a value"
}
# If given as a boolean, use the default value
set setvalue $defaultvalue
}
lappend listvalue $setvalue
}
#puts "Found string option --$name=$listvalue"
dict set autosetup(optset) $name $listvalue
}
}
# Now create the help for this option if appropriate
if {[lindex $opts $i+1] eq "=>"} {
set desc [lindex $opts $i+2]
if {[info exists defaultvalue]} {
set desc [string map [list @default@ $defaultvalue] $desc]
}
# A multi-line description
lappend autosetup(optionhelp) [list $opthelp $autosetup(module) $desc]
incr i 2
}
}
}
# @module-options optionlist
#
# Deprecated. Simply use 'options' from within a module.
proc module-options {opts} {
options $opts
}
proc max {a b} {
expr {$a > $b ? $a : $b}
}
proc options-wrap-desc {text length firstprefix nextprefix initial} {
set len $initial
set space $firstprefix
foreach word [split $text] {
set word [string trim $word]
if {$word == ""} {
continue
}
if {$len && [string length $space$word] + $len >= $length} {
puts ""
set len 0
set space $nextprefix
}
incr len [string length $space$word]
puts -nonewline $space$word
set space " "
}
if {$len} {
puts ""
}
}
# Display options (from $autosetup(optionhelp)) for modules that match
# glob pattern $what
proc options-show {what} {
set local 0
# Determine the max option width
set max 0
foreach help $::autosetup(optionhelp) {
lassign $help opt module desc
if {![string match $what $module]} {
continue
}
if {[string match =* $opt] || [string match \n* $desc]} {
continue
}
set max [max $max [string length $opt]]
}
set indent [string repeat " " [expr {$max+4}]]
set cols [getenv COLUMNS 80]
catch {
lassign [exec stty size] _ sttycols
if {[string is integer -strict $sttycols]} {
set cols $sttycols
}
}
incr cols -1
# Now output
foreach help $::autosetup(optionhelp) {
lassign $help opt module desc
if {![string match $what $module]} {
continue
}
if {$local == 0 && $module eq "auto.def"} {
puts "Local Options:"
incr local
}
if {[string match =* $opt]} {
# Output a special heading line"
puts [string range $opt 1 end]
continue
}
puts -nonewline " [format %-${max}s $opt]"
if {[string match \n* $desc]} {
# Output a pre-formatted help description as-is
puts $desc
} else {
options-wrap-desc [string trim $desc] $cols " " $indent [expr {$max+2}]
}
}
}
# @options optionspec
#
# Specifies configuration-time options which may be selected by the user
# and checked with 'opt-str' and 'opt-bool'. '$optionspec' contains a series
# of options specifications separated by newlines, as follows:
#
# A boolean option is of the form:
#
## name[=0|1] => "Description of this boolean option"
#
# The default is 'name=0', meaning that the option is disabled by default.
# If 'name=1' is used to make the option enabled by default, the description should reflect
# that with text like "Disable support for ...".
#
# An argument option (one which takes a parameter) is of one of the following forms:
#
## name:value => "Description of this option"
## name:value=default => "Description of this option with a default value"
## name:=value => "Description of this option with an optional value"
#
# If the 'name:value' form is used, the value must be provided with the option (as '--name=myvalue').
# If the 'name:value=default' form is used, the option has the given default value even if not
# specified by the user.
# If the 'name:=value' form is used, the value is optional and the given value is used
# if it is not provided.
#
# The description may contain '@default@', in which case it will be replaced with the default
# value for the option (taking into account defaults specified with 'options-defaults'.
#
# Undocumented options are also supported by omitting the '=> description'.
# These options are not displayed with '--help' and can be useful for internal options or as aliases.
#
# For example, '--disable-lfs' is an alias for '--disable=largefile':
#
## lfs=1 largefile=1 => "Disable large file support"
#
proc options {optlist} {
global autosetup
options-add $optlist
if {$autosetup(showhelp)} {
# If --help, stop now to show help
return -code break
}
if {$autosetup(module) eq "auto.def"} {
# Check for invalid options
if {[opt-bool option-checking]} {
foreach o [dict keys $::autosetup(getopt)] {
if {$o ni $::autosetup(options)} {
user-error "Unknown option --$o"
}
}
}
}
}
# @options-defaults dictionary
#
# Specifies a dictionary of options and a new default value for each of those options.
# Use before any 'use' statements in 'auto.def' to change the defaults for
# subsequently included modules.
proc options-defaults {dict} {
foreach {n v} $dict {
dict set ::autosetup(options-defaults) $n $v
}
}
proc config_guess {} {
if {[file-isexec $::autosetup(dir)/autosetup-config.guess]} {
if {[catch {exec-with-stderr sh $::autosetup(dir)/autosetup-config.guess} alias]} {
user-error $alias
}
return $alias
} else {
configlog "No autosetup-config.guess, so using uname"
string tolower [exec uname -p]-unknown-[exec uname -s][exec uname -r]
}
}
proc config_sub {alias} {
if {[file-isexec $::autosetup(dir)/autosetup-config.sub]} {
if {[catch {exec-with-stderr sh $::autosetup(dir)/autosetup-config.sub $alias} alias]} {
user-error $alias
}
}
return $alias
}
# @section Variable Definitions (defines)
# @define name ?value=1?
#
# Defines the named variable to the given value.
# These (name, value) pairs represent the results of the configuration check
# and are available to be subsequently checked, modified and substituted.
#
proc define {name {value 1}} {
set ::define($name) $value
#dputs "$name <= $value"
}
# @define-push {name ...} script
#
# Save the values of the given defines, evaluation the script, then restore.
# For example, to avoid updating AS_FLAGS and AS_CXXFLAGS:
## define-push {AS_CFLAGS AS_CXXFLAGS} {
## cc-check-flags -Wno-error
## }
proc define-push {names script} {
array set unset {}
foreach name $names {
if {[is-defined $name]} {
set save($name) [get-define $name]
} else {
set unset($name) 1
}
}
uplevel 1 $script
array set ::define [array get save]
foreach name [array names unset] {
unset -nocomplain ::define($name)
}
}
# @undefine name
#
# Undefine the named variable.
#
proc undefine {name} {
unset -nocomplain ::define($name)
#dputs "$name <= <undef>"
}
# @define-append name value ...
#
# Appends the given value(s) to the given "defined" variable.
# If the variable is not defined or empty, it is set to '$value'.
# Otherwise the value is appended, separated by a space.
# Any extra values are similarly appended.
#
# Note that define-append is not designed to add values containing spaces.
# If values may contain spaces, consider define-append-argv instead.
#
proc define-append {name args} {
if {[get-define $name ""] ne ""} {
foreach arg $args {
if {$arg eq ""} {
continue
}
append ::define($name) " " $arg
}
} else {
set ::define($name) [join $args]
}
#dputs "$name += [join $args] => $::define($name)"
}
# @define-append-argv name value ...
#
# Similar to define-append except designed to construct shell command
# lines, including correct handling of parameters with spaces.
#
# Each non-empty value is quoted if necessary and then appended to the given variable
# if it does not already exist.
#
proc define-append-argv {name args} {
set seen {}
set new {}
foreach val [list {*}[get-define $name ""] {*}$args] {
if {$val ne {} && ![dict exists $seen $val]} {
lappend new [quote-if-needed $val]
dict set seen $val 1
}
}
set ::define($name) [join $new " "]
#dputs "$name += [join $args] => $::define($name)"
}
# @get-define name ?default=0?
#
# Returns the current value of the "defined" variable, or '$default'
# if not set.
#
proc get-define {name {default 0}} {
if {[info exists ::define($name)]} {
#dputs "$name => $::define($name)"
return $::define($name)
}
#dputs "$name => $default"
return $default
}
# @is-defined name
#
# Returns 1 if the given variable is defined.
#
proc is-defined {name} {
info exists ::define($name)
}
# @is-define-set name
#
# Returns 1 if the given variable is defined and is set
# to a value other than "" or 0
#
proc is-define-set {name} {
if {[get-define $name] in {0 ""}} {
return 0
}
return 1
}
# @all-defines
#
# Returns a dictionary (name, value list) of all defined variables.
#
# This is suitable for use with 'dict', 'array set' or 'foreach'
# and allows for arbitrary processing of the defined variables.
#
proc all-defines {} {
array get ::define
}
# @section Environment/Helpers
# @get-env name default
#
# If '$name' was specified on the command line, return it.
# Otherwise if '$name' was set in the environment, return it.
# Otherwise return '$default'.
#
proc get-env {name default} {
if {[dict exists $::autosetup(cmdline) $name]} {
return [dict get $::autosetup(cmdline) $name]
}
getenv $name $default
}
# @env-is-set name
#
# Returns 1 if '$name' was specified on the command line or in the environment.
# Note that an empty environment variable is not considered to be set.
#
proc env-is-set {name} {
if {[dict exists $::autosetup(cmdline) $name]} {
return 1
}
if {[getenv $name ""] ne ""} {
return 1
}
return 0
}
# @readfile filename ?default=""?
#
# Return the contents of the file, without the trailing newline.
# If the file doesn't exist or can't be read, returns '$default'.
#
proc readfile {filename {default_value ""}} {
set result $default_value
catch {
set f [open $filename]
set result [read -nonewline $f]
close $f
}
return $result
}
# @writefile filename value
#
# Creates the given file containing '$value'.
# Does not add an extra newline.
#
proc writefile {filename value} {
set f [open $filename w]
puts -nonewline $f $value
close $f
}
proc quote-if-needed {str} {
if {[string match {*[\" ]*} $str]} {
return \"[string map [list \" \\" \\ \\\\] $str]\"
}
return $str
}
proc quote-argv {argv} {
set args {}
foreach arg $argv {
lappend args [quote-if-needed $arg]
}
join $args
}
# @list-non-empty list
#
# Returns a copy of the given list with empty elements removed
proc list-non-empty {list} {
set result {}
foreach p $list {
if {$p ne ""} {
lappend result $p
}
}
return $result
}
# @section Paths, Searching
# @find-executable-path name
#
# Searches the path for an executable with the given name.
# Note that the name may include some parameters, e.g. 'cc -mbig-endian',
# in which case the parameters are ignored.
# Returns the full path to the executable if found, or "" if not found.
#
proc find-executable-path {name} {
# Ignore any parameters
set name [lindex $name 0]
# The empty string is never a valid executable
if {$name ne ""} {
foreach p [split-path] {
dputs "Looking for $name in $p"
set exec [file join $p $name]
if {[file-isexec $exec]} {
dputs "Found $name -> $exec"
return $exec
}
}
}
return {}
}
# @find-executable name
#
# Searches the path for an executable with the given name.
# Note that the name may include some parameters, e.g. 'cc -mbig-endian',
# in which case the parameters are ignored.
# Returns 1 if found, or 0 if not.
#
proc find-executable {name} {
if {[find-executable-path $name] eq {}} {
return 0
}
return 1
}
# @find-an-executable ?-required? name ...
#
# Given a list of possible executable names,
# searches for one of these on the path.
#
# Returns the name found, or "" if none found.
# If the first parameter is '-required', an error is generated
# if no executable is found.
#
proc find-an-executable {args} {
set required 0
if {[lindex $args 0] eq "-required"} {
set args [lrange $args 1 end]
incr required
}
foreach name $args {
if {[find-executable $name]} {
return $name
}
}
if {$required} {
if {[llength $args] == 1} {
user-error "failed to find: [join $args]"
} else {
user-error "failed to find one of: [join $args]"
}
}
return ""
}
# @section Logging, Messages and Errors
# @configlog msg
#
# Writes the given message to the configuration log, 'config.log'.
#
proc configlog {msg} {
if {![info exists ::autosetup(logfh)]} {
set ::autosetup(logfh) [open config.log w]
}
puts $::autosetup(logfh) $msg
}
# @msg-checking msg
#
# Writes the message with no newline to stdout.
#
proc msg-checking {msg} {
if {$::autosetup(msg-quiet) == 0} {
maybe-show-timestamp
puts -nonewline $msg
set ::autosetup(msg-checking) 1