131 lines
3.0 KiB
Bash
Executable File
131 lines
3.0 KiB
Bash
Executable File
#!/bin/sh
|
|
#
|
|
# Build two documentation trees and diff the resulting formatted output.
|
|
# Compared to a source diff, this can reveal mistakes in the formatting.
|
|
# For example:
|
|
#
|
|
# ./doc-diff origin/master HEAD
|
|
#
|
|
# would show the differences introduced by a branch based on master.
|
|
|
|
OPTIONS_SPEC="\
|
|
doc-diff [options] <from> <to> [-- <diff-options>]
|
|
doc-diff (-c|--clean)
|
|
--
|
|
j=n parallel argument to pass to make
|
|
f force rebuild; do not rely on cached results
|
|
c,clean cleanup temporary working files
|
|
"
|
|
SUBDIRECTORY_OK=1
|
|
. "$(git --exec-path)/git-sh-setup"
|
|
|
|
parallel=
|
|
force=
|
|
clean=
|
|
while test $# -gt 0
|
|
do
|
|
case "$1" in
|
|
-j)
|
|
parallel=$2; shift ;;
|
|
-c|--clean)
|
|
clean=t ;;
|
|
-f)
|
|
force=t ;;
|
|
--)
|
|
shift; break ;;
|
|
*)
|
|
usage ;;
|
|
esac
|
|
shift
|
|
done
|
|
|
|
cd_to_toplevel
|
|
tmp=Documentation/tmp-doc-diff
|
|
|
|
if test -n "$clean"
|
|
then
|
|
test $# -eq 0 || usage
|
|
git worktree remove --force "$tmp/worktree" 2>/dev/null
|
|
rm -rf "$tmp"
|
|
exit 0
|
|
fi
|
|
|
|
if test -z "$parallel"
|
|
then
|
|
parallel=$(getconf _NPROCESSORS_ONLN 2>/dev/null)
|
|
if test $? != 0 || test -z "$parallel"
|
|
then
|
|
parallel=1
|
|
fi
|
|
fi
|
|
|
|
test $# -gt 1 || usage
|
|
from=$1; shift
|
|
to=$1; shift
|
|
|
|
from_oid=$(git rev-parse --verify "$from") || exit 1
|
|
to_oid=$(git rev-parse --verify "$to") || exit 1
|
|
|
|
if test -n "$force"
|
|
then
|
|
rm -rf "$tmp"
|
|
fi
|
|
|
|
# We'll do both builds in a single worktree, which lets "make" reuse
|
|
# results that don't differ between the two trees.
|
|
if ! test -d "$tmp/worktree"
|
|
then
|
|
git worktree add -f --detach "$tmp/worktree" "$from" &&
|
|
dots=$(echo "$tmp/worktree" | sed 's#[^/]*#..#g') &&
|
|
ln -s "$dots/config.mak" "$tmp/worktree/config.mak"
|
|
fi
|
|
|
|
# generate_render_makefile <srcdir> <dstdir>
|
|
generate_render_makefile () {
|
|
find "$1" -type f |
|
|
while read src
|
|
do
|
|
dst=$2/${src#$1/}
|
|
printf 'all:: %s\n' "$dst"
|
|
printf '%s: %s\n' "$dst" "$src"
|
|
printf '\t@echo >&2 " RENDER $(notdir $@)" && \\\n'
|
|
printf '\tmkdir -p $(dir $@) && \\\n'
|
|
printf '\tMANWIDTH=80 man $< >$@+ && \\\n'
|
|
printf '\tmv $@+ $@\n'
|
|
done
|
|
}
|
|
|
|
# render_tree <committish_oid>
|
|
render_tree () {
|
|
# Skip install-man entirely if we already have an installed directory.
|
|
# We can't rely on make here, since "install-man" unconditionally
|
|
# copies the files (spending effort, but also updating timestamps that
|
|
# we then can't rely on during the render step). We use "mv" to make
|
|
# sure we don't get confused by a previous run that failed partway
|
|
# through.
|
|
if ! test -d "$tmp/installed/$1"
|
|
then
|
|
git -C "$tmp/worktree" checkout --detach "$1" &&
|
|
make -j$parallel -C "$tmp/worktree" \
|
|
GIT_VERSION=omitted \
|
|
SOURCE_DATE_EPOCH=0 \
|
|
DESTDIR="$PWD/$tmp/installed/$1+" \
|
|
install-man &&
|
|
mv "$tmp/installed/$1+" "$tmp/installed/$1"
|
|
fi &&
|
|
|
|
# As with "installed" above, we skip the render if it's already been
|
|
# done. So using make here is primarily just about running in
|
|
# parallel.
|
|
if ! test -d "$tmp/rendered/$1"
|
|
then
|
|
generate_render_makefile "$tmp/installed/$1" "$tmp/rendered/$1+" |
|
|
make -j$parallel -f - &&
|
|
mv "$tmp/rendered/$1+" "$tmp/rendered/$1"
|
|
fi
|
|
}
|
|
|
|
render_tree $from_oid &&
|
|
render_tree $to_oid &&
|
|
git -C $tmp/rendered diff --no-index "$@" $from_oid $to_oid
|