#!/bin/sh
#===-- tdtags - TableGen tags wrapper ---------------------------*- sh -*-===#
# vim:set sts=2 sw=2 et:
#===----------------------------------------------------------------------===#
#
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
# See https://llvm.org/LICENSE.txt for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#
#===----------------------------------------------------------------------===#
#
# This is a wrapper script to simplify generating ctags(1)-compatible index
# files for target .td files. Run tdtags -H for more documentation.
#
# For portability, this script is intended to conform to IEEE Std 1003.1-2008.
#
#===----------------------------------------------------------------------===#
SELF=${0##*/}
usage() {
cat <<END
Usage: $SELF [ <options> ] tdfile
or: $SELF [ <options> ] -x recipe [arg ...]
OPTIONS
-H Display further help.
-a Append the tags to an existing tags file.
-f <file> Write tags to the specified file (defaults to 'tags').
-I <dir> Add the directory to the search path for tblgen include files.
-x <recipe> Generate tags file(s) for a common use case:
-q Suppress $TBLGEN error messages.
-v Be verbose; report progress.
END
usage_recipes
}
usage_recipes() {
cat <<END
all - Generate an index in each directory that contains .td files
in the LLVM source tree.
here - Generate an index for all .td files in the current directory.
recurse - Generate an index in each directory that contains .td files
in and under the current directory.
target [<target> ...]
- Generate a tags file for each specified LLVM code generator
target, or if none are specified, all targets.
END
}
help() {
cat <<END
NAME
$SELF - generate ctags(1)-compatible index files for tblgen .td source
SYNOPSIS
$SELF [ options ] -x recipe [arg ...]
$SELF [ options ] [file ...]
DESCRIPTION
With the '-x' option, $SELF produces one or more tags files for a
particular common use case. See the RECIPES section below for details.
Without the '-x' option, $SELF provides a ctags(1)-like interface to
$TBLGEN.
OPTIONS
-a Append newly generated tags to those already in an existing
tags file. Without ths option, any and all existing tags are
replaced. NOTE: When building a mixed tags file, using ${SELF}
for tblgen tags and ctags(1) for other languages, it is best
to run ${SELF} first without '-a', and ctags(1) second with '-a',
because ctags(1) handling is more capable.
-f <file> Use the name <file> for the tags file, rather than the default
"tags". If the <file> is "-", then the tag index is written to
standard output.
-H Display this document.
-I <dir> Add the directory <dir> to the search path for 'include'
statements in tblgen source.
-x Run a canned recipe, rather than operate on specified files.
When '-x' is present, the first non-option argument is the
name of a recipe, and any further arguments are arguments to
that recipe. With no arguments, lists the available recipes.
-q Suppress $TBLGEN error messages. Not all .td files are well-
formed outside a specific context, so recipes will sometimes
produce error messages for certain .td files. These errors
do not affect the indices produced for valid files.
-v Be verbose; report progress.
RECIPES
$SELF -x all
Produce a tags file in every directory in the LLVM source tree
that contains any .td files.
$SELF -x here
Produce a tags file from .td files in the current directory.
$SELF -x recurse
Produce a tags file in every directory that contains any .td
files, in and under the current directory.
$SELF -x target [<target> ...]
Produce a tags file for each named code generator target, or
if none are named, for all code generator targets.
END
}
# Temporary file management.
#
# Since SUS sh(1) has no arrays, this script makes extensive use of
# temporary files. The follow are 'global' and used to carry information
# across functions:
# $TMP:D Include directories.
# $TMP:I Included files.
# $TMP:T Top-level files, that are not included by another.
# $TMP:W Directories in which to generate tags (Worklist).
# For portability to OS X, names must not differ only in case.
#
TMP=${TMPDIR:-/tmp}/$SELF:$$
trap "rm -f $TMP*" 0
trap exit 1 2 13 15
>$TMP:D
td_dump()
{
if [ $OPT_VERBOSE -gt 1 ]
then
printf '===== %s =====\n' "$1"
cat <"$1"
fi
}
# Escape the arguments, taken as a whole.
e() {
printf '%s' "$*" |
sed -e "s/'/'\\\\''/g" -e "1s/^/'/" -e "\$s/\$/'/"
}
# Determine whether the given directory contains at least one .td file.
dir_has_td() {
for i in $1/*.td
do
[ -f "$i" ] && return 0
done
return 1
}
# Partition the supplied list of files, plus any files included from them,
# into two groups:
# $TMP:T Top-level files, that are not included by another.
# $TMP:I Included files.
# Add standard directories to the include paths in $TMP:D if this would
# benefit the any of the included files.
td_prep() {
>$TMP:E
>$TMP:J
for i in *.td
do
[ "x$i" = 'x*.td' ] && return 1
if [ -f "$i" ]
then
printf '%s\n' "$i" >>$TMP:E
sed -n -e 's/include[[:space:]]"\(.*\)".*/\1/p' <"$i" >>$TMP:J
else
printf >&2 '%s: "%s" not found.\n' "$SELF" "$i"
exit 7
fi
done
sort -u <$TMP:E >$TMP:X
sort -u <$TMP:J >$TMP:I
# A file that exists but is not included is toplevel.
comm -23 $TMP:X $TMP:I >$TMP:T
td_dump $TMP:T
td_dump $TMP:I
# Check include files.
while read i
do
[ -f "$i" ] && continue
while read d
do
[ -f "$d/$i" ] && break
done <$TMP:D
if [ -z "$d" ]
then
# See whether this include file can be found in a common location.
for d in $LLVM_SRC_ROOT/include \
$LLVM_SRC_ROOT/tools/clang/include
do
if [ -f "$d/$i" ]
then
printf '%s\n' "$d" >>$TMP:D
break
fi
done
fi
done <$TMP:I
td_dump $TMP:D
}
# Generate tags for the list of files in $TMP:T.
td_tag() {
# Collect include directories.
inc=
while read d
do
inc="${inc}${inc:+ }$(e "-I=$d")"
done <$TMP:D
if [ $OPT_VERBOSE -ne 0 ]
then
printf >&2 'In "%s",\n' "$PWD"
fi
# Generate tags for each file.
n=0
while read i
do
if [ $OPT_VERBOSE -ne 0 ]
then
printf >&2 ' generating tags from "%s"\n' "$i"
fi
n=$((n + 1))
t=$(printf '%s:A:%05u' "$TMP" $n)
eval $TBLGEN --gen-ctags $inc "$i" >$t 2>$TMP:F
[ $OPT_NOTBLGENERR -eq 1 ] || cat $TMP:F
done <$TMP:T
# Add existing tags if requested.
if [ $OPT_APPEND -eq 1 -a -f "$OPT_TAGSFILE" ]
then
if [ $OPT_VERBOSE -ne 0 ]
then
printf >&2 ' and existing tags from "%s"\n' "$OPT_TAGSFILE"
fi
n=$((n + 1))
t=$(printf '%s:A:%05u' "$TMP" $n)
sed -e '/^!_TAG_/d' <"$OPT_TAGSFILE" | sort -u >$t
fi
# Merge tags.
if [ $n = 1 ]
then
mv -f "$t" $TMP:M
else
sort -m -u $TMP:A:* >$TMP:M
fi
# Emit tags.
if [ x${OPT_TAGSFILE}x = x-x ]
then
cat $TMP:M
else
if [ $OPT_VERBOSE -ne 0 ]
then
printf >&2 ' into "%s".\n' "$OPT_TAGSFILE"
fi
mv -f $TMP:M "$OPT_TAGSFILE"
fi
}
# Generate tags for the current directory.
td_here() {
td_prep
[ -s $TMP:T ] || return 1
td_tag
}
# Generate tags for the current directory, and report an error if there are
# no .td files present.
do_here()
{
if ! td_here
then
printf >&2 '%s: Nothing to do here.\n' "$SELF"
exit 1
fi
}
# Generate tags for all .td files under the current directory.
do_recurse()
{
td_find "$PWD"
td_dirs
}
# Generate tags for all .td files in LLVM.
do_all()
{
td_find "$LLVM_SRC_ROOT"
td_dirs
}
# Generate tags for each directory in the worklist $TMP:W.
td_dirs()
{
while read d
do
(cd "$d" && td_here)
done <$TMP:W
}
# Find directories containing .td files within the specified directory,
# and record them in the worklist $TMP:W.
td_find()
{
find -L "$1" -type f -name '*.td' |
sed -e 's:/[^/]*$::' |
sort -u >$TMP:W
td_dump $TMP:W
}
# Generate tags for the specified code generator targets, or
# if there are no arguments, all targets.
do_targets() {
cd $LLVM_SRC_ROOT/lib/Target
if [ -z "$*" ]
then
td_find "$PWD"
else
# Check that every specified argument is a target directory;
# if not, list all target directories.
for d
do
if [ -d "$d" ] && dir_has_td "$d"
then
printf '%s/%s\n' "$PWD" "$d"
else
printf >&2 '%s: "%s" is not a target. Targets are:\n' "$SELF" "$d"
for d in *
do
[ -d "$d" ] || continue
dir_has_td "$d" && printf >&2 ' %s\n' "$d"
done
exit 2
fi
done >$TMP:W
fi
td_dirs
}
# Change to the directory at the top of the enclosing LLVM source tree,
# if possible.
llvm_src_root() {
while [ "$PWD" != / ]
do
# Use this directory if multiple notable subdirectories are present.
[ -d include/llvm -a -d lib/Target ] && return 0
cd ..
done
return 1
}
# Ensure sort(1) behaves consistently.
LC_ALL=C
export LC_ALL
# Globals.
TBLGEN=llvm-tblgen
LLVM_SRC_ROOT=
# Command options.
OPT_TAGSFILE=tags
OPT_RECIPES=0
OPT_APPEND=0
OPT_VERBOSE=0
OPT_NOTBLGENERR=0
while getopts 'af:hxqvHI:' opt
do
case $opt in
a)
OPT_APPEND=1
;;
f)
OPT_TAGSFILE="$OPTARG"
;;
x)
OPT_RECIPES=1
;;
q)
OPT_NOTBLGENERR=1
;;
v)
OPT_VERBOSE=$((OPT_VERBOSE + 1))
;;
I)
printf '%s\n' "$OPTARG" >>$TMP:D
;;
[hH])
help
exit 0
;;
*)
usage >&2
exit 4
;;
esac
done
shift $((OPTIND - 1))
# Handle the case where tdtags is a simple ctags(1)-like wrapper for tblgen.
if [ $OPT_RECIPES -eq 0 ]
then
if [ -z "$*" ]
then
help >&2
exit 5
fi
for i
do
printf '%s\n' "$i"
done >$TMP:T
td_tag
exit $?
fi
# Find the directory at the top of the enclosing LLVM source tree.
if ! LLVM_SRC_ROOT=$(llvm_src_root && pwd)
then
printf >&2 '%s: Run from within the LLVM source tree.\n' "$SELF"
exit 3
fi
# Select canned actions.
RECIPE="$1"
case "$RECIPE" in
all)
shift
do_all
;;
.|cwd|here)
shift
do_here
;;
recurse)
shift
do_recurse
;;
target)
shift
do_targets "$@"
;;
*)
if [ -n "$RECIPE" ]
then
shift
printf >&2 '%s: Unknown recipe "-x %s". ' "$SELF" "$RECIPE"
fi
printf >&2 'Recipes:\n'
usage_recipes >&2
printf >&2 'Run "%s -H" for help.\n' "$SELF"
exit 6
;;
esac
exit $?
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