mkinitcpio: remove --basedir option

This option is just a bad idea. Initramfs creation is too important to
get wrong, and running it from outside the root FS has too many gotchas,
the worst of them being:

- where do you pull hooks from?
- how do you resolve binary dependencies within the root?

In general, dealing with the extra luggage of the base directory makes the
codebase more complicated than it needs to be (see all the '_' prefixed
functions which are called from add functions). In favor of simplifying the
code, and making it more maintainable, kill this off and force the sane
option of chroot'ing into an install if the need arises.

Signed-off-by: Dave Reisner <dreisner@archlinux.org>

1 files changed, 12 insertions, 28 deletions

diff --git a/mkinitcpio b/mkinitcpio
index 084dff7..1c92a27 100755
--- a/mkinitcpio
+++ b/mkinitcpio
@@ -22,7 +22,7 @@ INSTDIR=(install /usr/lib/initcpio/install /lib/initcpio/install)
 PRESETDIR=mkinitcpio.d
 COMPRESSION=gzip
 
-declare BASEDIR= MODULE_FILE= GENIMG= PRESET= COMPRESSION_OPTIONS= BUILDROOT=
+declare MODULE_FILE= GENIMG= PRESET= COMPRESSION_OPTIONS= BUILDROOT=
 declare NC= BOLD= BLUE= GREEN= RED= YELLOW=
 declare -i QUIET=1 SHOW_AUTOMODS=0 SAVELIST=0 COLOR=1
 declare -a SKIPHOOKS ADDED_MODULES MODPATHS
@@ -42,7 +42,6 @@ usage: ${0##*/} [options]
 
   Options:
    -A, --add <hooks>            Add specified hooks, comma separated, to image
-   -b, --basedir <dir>          Use alternate base directory. (default: /)
    -c, --config <config>        Use alternate config file. (default: /etc/mkinitcpio.conf)
    -g, --generate <path>        Generate cpio image and write to specified path
    -H, --hookhelp <hookname>    Display help for given hook and exit
@@ -87,18 +86,17 @@ get_kernver() {
         return 0
     fi
 
-    if [[ ! -e $BASEDIR$kernel ]]; then
-        error "Specified kernel image does not exist: \`%s'" "$BASEDIR$kernel"
+    if [[ ! -e $kernel ]]; then
+        error "Specified kernel image does not exist: \`%s'" "$kernel"
         return 1
     fi
 
-    read _ kernver < <(file -Lb "$BASEDIR$kernel" | grep -o 'version [^ ]\+')
-    if [[ $kernver && -e $BASEDIR/lib/modules/$kernver ]]; then
+    read _ kernver < <(file -Lb "$kernel" | grep -o 'version [^ ]\+')
+    if [[ $kernver && -e /lib/modules/$kernver ]]; then
         echo "$kernver"
         return 0
     fi
 
-    [[ ${optkver:0:1} == / ]] && optkver=$BASEDIR$optkver
     error "invalid kernel specifier: \`%s'" "$optkver"
 
     return 1
@@ -116,9 +114,9 @@ compute_hookset() {
 trap 'cleanup 130' INT
 trap 'cleanup 143' TERM
 
-OPT_SHORT='A:b:c:g:H:hk:mnLMp:S:st:vz:'
-OPT_LONG=('add:' 'basedir:' 'config:' 'generate:' 'hookhelp:' 'help' 'kernel:' 'listhooks'
-          'automods' 'nocolor' 'preset:' 'skiphooks:' 'save' 'builddir:' 'verbose' 'compress:')
+OPT_SHORT='A:c:g:H:hk:mnLMp:S:st:vz:'
+OPT_LONG=('add:' 'config:' 'generate:' 'hookhelp:' 'help' 'kernel:' 'listhooks' 'automods'
+          'nocolor' 'preset:' 'skiphooks:' 'save' 'builddir:' 'verbose' 'compress:')
 
 if ! parseopts "$OPT_SHORT" "${OPT_LONG[@]}" -- "$@"; then
     exit 1
@@ -141,9 +139,6 @@ while :; do
             optkver=$1 ;;
         -s|--save)
             SAVELIST=1 ;;
-        -b|--basedir)
-            shift
-            BASEDIR=$1 ;;
         -g|--generate)
             shift
             GENIMG=$1 ;;
@@ -224,16 +219,6 @@ readonly NC BOLD BLUE GREEN RED YELLOW
 [[ -e /proc/self/mountinfo ]] || die "/proc must be mounted!"
 [[ -e /dev/fd ]] || die "/dev must be mounted!"
 
-if [[ $BASEDIR ]]; then
-    # resolve the path. it might be a relative path and/or contain symlinks
-    if ! pushd "$BASEDIR" &>/dev/null; then
-        die "base directory does not exist or is not a directory: \`%s'" "$BASEDIR"
-    fi
-    BASEDIR=$(pwd -P)
-    BASEDIR=${BASEDIR%/}
-    popd &>/dev/null
-fi
-
 KERNELVERSION=$(get_kernver "$optkver") || cleanup 1
 
 if [[ $TMPDIR ]]; then
@@ -261,7 +246,6 @@ if [[ $PRESET ]]; then
     if [[ -f "$PRESET" ]]; then
         # Use -b, -m and -v options specified earlier
         declare -a preset_mkopts preset_cmd
-        [[ $BASEDIR ]] && preset_mkopts+=(-b "$BASEDIR")
         (( QUIET )) || preset_mkopts+=(-v)
         # Build all images
         . "$PRESET"
@@ -279,7 +263,7 @@ if [[ $PRESET ]]; then
 
             preset_config=${p}_config
             if [[ ${!preset_config:-$ALL_config} ]]; then
-              preset_cmd+=(-c "$BASEDIR${!preset_config:-$ALL_config}")
+              preset_cmd+=(-c "${!preset_config:-$ALL_config}")
             else
                 warning "No configuration file specified. Skipping image \`%s'" "$p"
                 continue
@@ -287,7 +271,7 @@ if [[ $PRESET ]]; then
 
             preset_image=${p}_image
             if [[ ${!preset_image} ]]; then
-                preset_cmd+=(-g "$BASEDIR${!preset_image}")
+                preset_cmd+=(-g "${!preset_image}")
             else
                 warning "No image file specified. Skipping image \`%s'" "$p"
                 continue
@@ -327,7 +311,7 @@ if (( ${#hooks[*]} == 0 )); then
     die "Invalid config: No hooks found"
 fi
 
-MODULEDIR=$BASEDIR/lib/modules/$KERNELVERSION/
+MODULEDIR=/lib/modules/$KERNELVERSION/
 if [[ ! -d $MODULEDIR ]]; then
     die "'$MODULEDIR' is not a valid kernel module directory"
 fi
@@ -416,7 +400,7 @@ if (( ${#ADDED_MODULES[*]} )); then
 
     msg "Generating module dependencies"
     install -m644 -t "$BUILDROOT/usr/lib/modules/$KERNELVERSION" \
-        "$BASEDIR/lib/modules/$KERNELVERSION"/modules.{builtin,order}
+        "/lib/modules/$KERNELVERSION"/modules.{builtin,order}
     depmod -b "$BUILDROOT" "$KERNELVERSION"
 
     # remove all non-binary module.* files (except devname for on-demand module loading)