#!/bin/sh

set -e

# git won't build without msgfmt, and gettext-tools won't build on a
# static-linked musl machine. make it a no-op if it's not available.
which msgfmt 2> /dev/null \
|| sed -i 's/MSGFMT = msgfmt/MSGFMT = echo/' Makefile

make configure

CFLAGS="$CFLAGS -g -O2 -Wall" \
LIBS="-lbearssl -lz" \
NO_REGEX=YesPlease \
NO_GETTEXT=YesPlease \
./configure \
    --without-tcltk \
    --with-expat \
    --with-libpcre2 \
    --build=$(uname -m)-lix-linux-musl \
    --prefix=

## explanation
#
# CFLAGS: do some completely optional optimization.
#
# LIBS: libcurl seems to depend on bearssl and zlib being included.  git doesn't
#     seem to pull these in automatically, so it's done here with LIBS.
#
# NO_GETTEXT: gettext allows for internationalization.  i.e., it lets git
#     replace english text with pre-translated strings based on the user's
#     locale.  nothing wrong with that, except gettext does not appear to
#     compile on static-only musl machines.
# 
# NO_REGEX: git relies on global regex constants that are not in musl.
#
# --without-tcltk: don't bother building "git gui."
#
# --with-expat: can't "git push" over http[s] without libexpat.
#
# --with-libpcre2: support perl-compatible regular expressions.
#
# --build: doesn't infer the right build triple on its own.
#
# --prefix: make sure git doesn't put anything in /usr/local. keep it simple.