# Shared setup for the run_magic* launchers -- sourced, not run directly.
#
# Generated by configure from scripts/magic_run_common.sh.in.  It stages a
# CAD_ROOT directory of *symlinks* into the build (generated) and source trees --
# the same layout `make install` copies, but instantly and always reflecting the
# latest build -- and exports the environment magic needs to start straight from
# the build tree without `make install`.
#
# See magic's runtime file discovery: MAGIC_SYS_PATH = ". $CAD_ROOT/magic/sys
# $CAD_ROOT/magic/sys/current" (utils/paths.h) for tech/glyphs/fonts/styles, the
# system .magicrc at $CAD_ROOT/magic/sys/.magicrc, and (since tcltk/tcldir.h)
# magic.tcl / tclmagic / auto_path at $CAD_ROOT/magic/tcl.

MAGIC_BUILDDIR="@abs_top_builddir@"
MAGIC_SRCDIR="@abs_top_srcdir@"
SHDLIB_EXT="@SHDLIB_EXT@"

CAD_ROOT="${MAGIC_BUILDDIR}/CAD_DIR"
export CAD_ROOT
MAGIC_SYS="${CAD_ROOT}/magic/sys"
MAGIC_TCL="${CAD_ROOT}/magic/tcl"

# (Re)build the symlink layout.  Idempotent; `ln -sf` relinks so a rebuilt target
# is always current.  Missing globs (a partial build) are tolerated.
magic_stage() {
    local b="$MAGIC_BUILDDIR" s="$MAGIC_SRCDIR"
    mkdir -p "$MAGIC_SYS" "$MAGIC_TCL"

    # --- sys/ : generated tech (build) + display files/glyphs/fonts (source) ---
    ln -sf "$b"/scmos/*.tech                              "$MAGIC_SYS"/ 2>/dev/null || :
    ln -sf "$s"/scmos/*.cmap "$s"/scmos/*dstyle           "$MAGIC_SYS"/ 2>/dev/null || :
    ln -sf "$s"/windows/*.glyphs "$s"/windows/vfont.*     "$MAGIC_SYS"/ 2>/dev/null || :
    ln -sf "$s"/graphics/*.glyphs "$s"/graphics/*.pt3     "$MAGIC_SYS"/ 2>/dev/null || :
    ln -sf "$b"/magic/proto.magicrc                       "$MAGIC_SYS"/.magicrc 2>/dev/null || :
    ln -sf "$b"/magic/proto.initrc                        "$MAGIC_SYS"/.initrc 2>/dev/null || :
    if [ -f "$b"/magic/magicps.pro ]; then
        ln -sf "$b"/magic/magicps.pro "$MAGIC_SYS"/ 2>/dev/null || :
    else
        ln -sf "$s"/magic/magicps.pro "$MAGIC_SYS"/ 2>/dev/null || :
    fi

    # --- tcl/ : source scripts + generated magic.tcl + .so + execs + bitmaps ---
    ln -sf "$s"/tcltk/*.tcl                               "$MAGIC_TCL"/ 2>/dev/null || :
    ln -sf "$b"/tcltk/magic.tcl                           "$MAGIC_TCL"/ 2>/dev/null || :
    ln -sf "$b"/magic/tclmagic${SHDLIB_EXT}               "$MAGIC_TCL"/ 2>/dev/null || :
    ln -sf "$b"/tcltk/magicexec "$b"/tcltk/magicdnull     "$MAGIC_TCL"/ 2>/dev/null || :
    # bitmaps is a *directory*: use -n so a re-stage replaces the existing
    # symlink instead of dereferencing it and dropping a self-link *inside* the
    # source tree (magic/bitmaps/bitmaps -> .../magic/bitmaps).
    ln -sfn "$s"/magic/bitmaps                            "$MAGIC_TCL"/bitmaps 2>/dev/null || :
}

# Fail early with a clear message if the build has not produced the binaries yet.
magic_require_built() {
    if [ ! -x "$MAGIC_BUILDDIR/tcltk/magicexec" ] && \
       [ ! -x "$MAGIC_BUILDDIR/tcltk/magicdnull" ]; then
        echo "error: magic is not built yet -- run 'make' in ${MAGIC_BUILDDIR} first." >&2
        exit 1
    fi
}