#!/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
+j=n parallel argument to pass to make
+f force rebuild; do not rely on cached results
+c,clean cleanup temporary working files
+from-asciidoc use asciidoc with the 'from'-commit
+from-asciidoctor use asciidoctor with the 'from'-commit
+asciidoc use asciidoc with both commits
+to-asciidoc use asciidoc with the 'to'-commit
+to-asciidoctor use asciidoctor with the 'to'-commit
+asciidoctor use asciidoctor with both commits
+cut-header-footer cut away header and footer
"
SUBDIRECTORY_OK=1
. "$(git --exec-path)/git-sh-setup"
parallel=
force=
+clean=
+from_program=
+to_program=
+cut_header_footer=
while test $# -gt 0
do
case "$1" in
-j)
parallel=$2; shift ;;
+ -c|--clean)
+ clean=t ;;
-f)
force=t ;;
+ --from-asciidoctor)
+ from_program=-asciidoctor ;;
+ --to-asciidoctor)
+ to_program=-asciidoctor ;;
+ --asciidoctor)
+ from_program=-asciidoctor
+ to_program=-asciidoctor ;;
+ --from-asciidoc)
+ from_program=-asciidoc ;;
+ --to-asciidoc)
+ to_program=-asciidoc ;;
+ --asciidoc)
+ from_program=-asciidoc
+ to_program=-asciidoc ;;
+ --cut-header-footer)
+ cut_header_footer=-cut-header-footer ;;
--)
shift; break ;;
*)
shift
done
+tmp="$(git rev-parse --show-toplevel)/Documentation/tmp-doc-diff" || exit 1
+
+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=$(getconf _NPROCESSORS_ONLN 2>/dev/null)
from_oid=$(git rev-parse --verify "$from") || exit 1
to_oid=$(git rev-parse --verify "$to") || exit 1
-cd_to_toplevel
-tmp=Documentation/tmp-doc-diff
-
if test -n "$force"
then
rm -rf "$tmp"
# results that don't differ between the two trees.
if ! test -d "$tmp/worktree"
then
- git worktree add --detach "$tmp/worktree" "$from" &&
+ 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
+construct_makemanflags () {
+ if test "$1" = "-asciidoc"
+ then
+ echo USE_ASCIIDOCTOR=
+ elif test "$1" = "-asciidoctor"
+ then
+ echo USE_ASCIIDOCTOR=YesPlease
+ fi
+}
+
+from_makemanflags=$(construct_makemanflags "$from_program") &&
+to_makemanflags=$(construct_makemanflags "$to_program") &&
+
+from_dir=$from_oid$from_program$cut_header_footer &&
+to_dir=$to_oid$to_program$cut_header_footer &&
+
# generate_render_makefile <srcdir> <dstdir>
generate_render_makefile () {
find "$1" -type f |
printf '%s: %s\n' "$dst" "$src"
printf '\t@echo >&2 " RENDER $(notdir $@)" && \\\n'
printf '\tmkdir -p $(dir $@) && \\\n'
- printf '\tMANWIDTH=80 man -l $< >$@+ && \\\n'
+ printf '\tMANWIDTH=80 man $< >$@+ && \\\n'
printf '\tmv $@+ $@\n'
done
}
-# render_tree <dirname> <committish>
+# render_tree <committish_oid> <directory_name> <makemanflags>
render_tree () {
# Skip install-man entirely if we already have an installed directory.
# We can't rely on make here, since "install-man" unconditionally
# we then can't rely on during the render step). We use "mv" to make
# sure we don't get confused by a previous run that failed partway
# through.
- if ! test -d "$tmp/installed/$1"
+ oid=$1 &&
+ dname=$2 &&
+ makemanflags=$3 &&
+ if ! test -d "$tmp/installed/$dname"
then
- git -C "$tmp/worktree" checkout "$2" &&
+ git -C "$tmp/worktree" checkout --detach "$oid" &&
make -j$parallel -C "$tmp/worktree" \
+ $makemanflags \
GIT_VERSION=omitted \
SOURCE_DATE_EPOCH=0 \
- DESTDIR="$PWD/$tmp/installed/$1+" \
+ DESTDIR="$tmp/installed/$dname+" \
install-man &&
- mv "$tmp/installed/$1+" "$tmp/installed/$1"
+ mv "$tmp/installed/$dname+" "$tmp/installed/$dname"
fi &&
# As with "installed" above, we skip the render if it's already been
# done. So using make here is primarily just about running in
# parallel.
- if ! test -d "$tmp/rendered/$1"
+ if ! test -d "$tmp/rendered/$dname"
then
- generate_render_makefile "$tmp/installed/$1" "$tmp/rendered/$1+" |
+ generate_render_makefile "$tmp/installed/$dname" \
+ "$tmp/rendered/$dname+" |
make -j$parallel -f - &&
- mv "$tmp/rendered/$1+" "$tmp/rendered/$1"
+ mv "$tmp/rendered/$dname+" "$tmp/rendered/$dname"
+
+ if test "$cut_header_footer" = "-cut-header-footer"
+ then
+ for f in $(find "$tmp/rendered/$dname" -type f)
+ do
+ tail -n +3 "$f" | head -n -2 |
+ sed -e '1{/^$/d}' -e '${/^$/d}' >"$f+" &&
+ mv "$f+" "$f" ||
+ return 1
+ done
+ fi
fi
}
-render_tree $from_oid "$from" &&
-render_tree $to_oid "$to" &&
-git -C $tmp/rendered diff --no-index "$@" $from_oid $to_oid
+render_tree $from_oid $from_dir $from_makemanflags &&
+render_tree $to_oid $to_dir $to_makemanflags &&
+git -C $tmp/rendered diff --no-index "$@" $from_dir $to_dir