view contrib/plan9/mkfile @ 36673:b3c9c483cac9

xdiff: add a bdiff hunk mode

xdiff generated hunks for the differences (ex. questionmarks in the
`@@ -?,?  +?,? @@` part from `diff --git` output). However, bdiff generates
matched hunks instead.

This patch adds a `XDL_EMIT_BDIFFHUNK` flag used by the output function
`xdl_call_hunk_func`.  Once set, xdiff will generate bdiff-like hunks
instead. That makes it easier to use xdiff as a drop-in replacement of bdiff.

Note that since `bdiff('', '')` returns `[(0, 0, 0, 0)]`, the shortcut path
`if (xscr)` is removed. I have checked functions called with `xscr` argument
(`xdl_mark_ignorable`, `xdl_call_hunk_func`, `xdl_emit_diff`,
`xdl_free_script`) work just fine with `xscr = NULL`.

Test Plan:
Will be tested in a later patch.

Differential Revision: https://phab.mercurial-scm.org/D2575

APE=/sys/src/ape
<$APE/config

PYTHON=python
PYTHONBIN=/rc/bin
SH=ape/psh

PURE=--pure
ROOT=../..

# This is slightly underhanded; Plan 9 does not support GNU gettext nor
# does it support dynamically loaded extension modules. We work around
# this by calling build_py and build_scripts directly; this avoids
# additional platform hacks in setup.py.
build:VQ:
	@{
		cd $ROOT
		$SH -c '$PYTHON setup.py $PURE build_py build_scripts'
	}

clean:VQ:
	@{
		cd $ROOT
		$SH -c '$PYTHON setup.py $PURE clean --all'
	}

install:VQ:	build
	@{
		cd $ROOT
		$SH -c '$PYTHON setup.py $PURE install \
			--install-scripts $PYTHONBIN \
			--skip-build \
			--force'
	}
	mkdir -p /lib/mercurial/hgrc.d
	dircp hgrc.d /lib/mercurial/hgrc.d/
	cp 9diff /rc/bin/