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![Martin Ågren](/assets/img/avatar_default.png)
After the previous commit, AsciiDoc and Asciidoctor render the manpage headers identically, so we no longer need the "cut the header" part of our `--cut-header-footer` option. We do still need the "cut the footer" part, though. The previous commits improved the rendering of the footer in Asciidoctor by quite a bit, but the two programs still disagree on how to format the date in the footer: 01/01/1970 vs 1970-01-01. We could keep using `--cut-header-footer`, but it would be nice if we had a slightly smaller hammer `--cut-footer` that would be less likely to hide regressions. Rather than simply adding such an option, let's also drop `--cut-header-footer`, i.e., rework it to lose the "header" part of its name and functionality. `--cut-header-footer` is just a developer tool and it probably has no more than a handful of users, so we can afford to be aggressive. Signed-off-by: Martin Ågren <martin.agren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
187 lines
4.5 KiB
Bash
Executable file
187 lines
4.5 KiB
Bash
Executable file
#!/bin/sh
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#
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# Build two documentation trees and diff the resulting formatted output.
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# Compared to a source diff, this can reveal mistakes in the formatting.
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# For example:
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#
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# ./doc-diff origin/master HEAD
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#
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# would show the differences introduced by a branch based on master.
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OPTIONS_SPEC="\
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doc-diff [options] <from> <to> [-- <diff-options>]
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doc-diff (-c|--clean)
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--
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j=n parallel argument to pass to make
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f force rebuild; do not rely on cached results
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c,clean cleanup temporary working files
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from-asciidoc use asciidoc with the 'from'-commit
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from-asciidoctor use asciidoctor with the 'from'-commit
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asciidoc use asciidoc with both commits
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to-asciidoc use asciidoc with the 'to'-commit
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to-asciidoctor use asciidoctor with the 'to'-commit
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asciidoctor use asciidoctor with both commits
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cut-footer cut away footer
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"
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SUBDIRECTORY_OK=1
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. "$(git --exec-path)/git-sh-setup"
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parallel=
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force=
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clean=
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from_program=
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to_program=
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cut_footer=
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while test $# -gt 0
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do
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case "$1" in
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-j)
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parallel=$2; shift ;;
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-c|--clean)
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clean=t ;;
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-f)
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force=t ;;
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--from-asciidoctor)
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from_program=-asciidoctor ;;
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--to-asciidoctor)
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to_program=-asciidoctor ;;
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--asciidoctor)
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from_program=-asciidoctor
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to_program=-asciidoctor ;;
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--from-asciidoc)
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from_program=-asciidoc ;;
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--to-asciidoc)
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to_program=-asciidoc ;;
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--asciidoc)
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from_program=-asciidoc
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to_program=-asciidoc ;;
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--cut-footer)
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cut_footer=-cut-footer ;;
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--)
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shift; break ;;
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*)
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usage ;;
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esac
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shift
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done
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tmp="$(git rev-parse --show-toplevel)/Documentation/tmp-doc-diff" || exit 1
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if test -n "$clean"
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then
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test $# -eq 0 || usage
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git worktree remove --force "$tmp/worktree" 2>/dev/null
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rm -rf "$tmp"
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exit 0
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fi
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if test -z "$parallel"
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then
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parallel=$(getconf _NPROCESSORS_ONLN 2>/dev/null)
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if test $? != 0 || test -z "$parallel"
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then
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parallel=1
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fi
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fi
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test $# -gt 1 || usage
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from=$1; shift
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to=$1; shift
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from_oid=$(git rev-parse --verify "$from") || exit 1
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to_oid=$(git rev-parse --verify "$to") || exit 1
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if test -n "$force"
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then
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rm -rf "$tmp"
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fi
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# We'll do both builds in a single worktree, which lets "make" reuse
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# results that don't differ between the two trees.
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if ! test -d "$tmp/worktree"
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then
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git worktree add -f --detach "$tmp/worktree" "$from" &&
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dots=$(echo "$tmp/worktree" | sed 's#[^/]*#..#g') &&
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ln -s "$dots/config.mak" "$tmp/worktree/config.mak"
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fi
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construct_makemanflags () {
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if test "$1" = "-asciidoc"
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then
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echo USE_ASCIIDOCTOR=
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elif test "$1" = "-asciidoctor"
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then
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echo USE_ASCIIDOCTOR=YesPlease
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fi
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}
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from_makemanflags=$(construct_makemanflags "$from_program") &&
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to_makemanflags=$(construct_makemanflags "$to_program") &&
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from_dir=$from_oid$from_program$cut_footer &&
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to_dir=$to_oid$to_program$cut_footer &&
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# generate_render_makefile <srcdir> <dstdir>
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generate_render_makefile () {
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find "$1" -type f |
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while read src
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do
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dst=$2/${src#$1/}
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printf 'all:: %s\n' "$dst"
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printf '%s: %s\n' "$dst" "$src"
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printf '\t@echo >&2 " RENDER $(notdir $@)" && \\\n'
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printf '\tmkdir -p $(dir $@) && \\\n'
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printf '\tMANWIDTH=80 man $< >$@+ && \\\n'
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printf '\tmv $@+ $@\n'
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done
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}
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# render_tree <committish_oid> <directory_name> <makemanflags>
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render_tree () {
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# Skip install-man entirely if we already have an installed directory.
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# We can't rely on make here, since "install-man" unconditionally
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# copies the files (spending effort, but also updating timestamps that
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# we then can't rely on during the render step). We use "mv" to make
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# sure we don't get confused by a previous run that failed partway
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# through.
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oid=$1 &&
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dname=$2 &&
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makemanflags=$3 &&
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if ! test -d "$tmp/installed/$dname"
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then
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git -C "$tmp/worktree" checkout --detach "$oid" &&
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make -j$parallel -C "$tmp/worktree" \
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$makemanflags \
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GIT_VERSION=omitted \
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SOURCE_DATE_EPOCH=0 \
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DESTDIR="$tmp/installed/$dname+" \
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install-man &&
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mv "$tmp/installed/$dname+" "$tmp/installed/$dname"
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fi &&
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# As with "installed" above, we skip the render if it's already been
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# done. So using make here is primarily just about running in
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# parallel.
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if ! test -d "$tmp/rendered/$dname"
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then
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generate_render_makefile "$tmp/installed/$dname" \
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"$tmp/rendered/$dname+" |
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make -j$parallel -f - &&
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mv "$tmp/rendered/$dname+" "$tmp/rendered/$dname"
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if test "$cut_footer" = "-cut-footer"
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then
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for f in $(find "$tmp/rendered/$dname" -type f)
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do
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head -n -2 "$f" | sed -e '${/^$/d}' >"$f+" &&
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mv "$f+" "$f" ||
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return 1
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done
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fi
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fi
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}
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render_tree $from_oid $from_dir $from_makemanflags &&
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render_tree $to_oid $to_dir $to_makemanflags &&
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git -C $tmp/rendered diff --no-index "$@" $from_dir $to_dir
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