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Diffstat (limited to 'src/db.sh')
| -rw-r--r-- | src/db.sh | 308 |
1 files changed, 0 insertions, 308 deletions
diff --git a/src/db.sh b/src/db.sh deleted file mode 100644 index ae96487..0000000 --- a/src/db.sh +++ /dev/null @@ -1,308 +0,0 @@ -# Copyright (c) 2016 Egor Tensin <egor@tensin.name> -# This file is part of the "Config file sharing" project. -# For details, see https://github.com/egor-tensin/config-links. -# Distributed under the MIT License. - -# Shared directory settings - -shared_root_dir="$( pwd )/" - -update_shared_dir() { - if [ "$#" -ne 1 ]; then - echo "usage: ${FUNCNAME[0]} DIR" >&2 - return 1 - fi - - local new_shared_dir - new_shared_dir="$( traverse_path --exist --directory -- "$1" )" - - [ "$new_shared_dir" = / ] || new_shared_dir="$new_shared_dir/" - - [ "$db_path" = "$shared_root_dir$default_db_name" ] \ - && db_path="$new_shared_dir$default_db_name" - - shared_root_dir="$new_shared_dir" -} - -# Database maintenance - -readonly default_db_name='links.bin' -db_path="$shared_root_dir$default_db_name" -declare -A database=() -declare -A shared_paths=() -declare -A symlink_paths=() - -update_database_path() { - if [ "$#" -ne 1 ]; then - echo "usage: ${FUNCNAME[0]} PATH" >&2 - return 1 - fi - - db_path="$( traverse_path --file -- "$1" )" - - local db_dir - db_dir="$( dirname -- "$db_path" )" - mkdir -p -- "$db_dir" -} - -add_entry() { - local entry - for entry; do - dump "entry: $entry" - - local var_name - var_name="$( extract_variable_name "$entry" )" - cache_variable "$var_name" - - local shared_var_dir="$shared_root_dir%$var_name%" - local symlink_var_dir - symlink_var_dir="$( resolve_variable "$var_name" )" - local subpath="${entry#%"$var_name"%/}" - - local shared_path="$shared_var_dir" - [ "$shared_var_dir" != / ] && shared_path="$shared_path/" - shared_path="$shared_path$subpath" - - local symlink_path="$symlink_var_dir" - [ "$symlink_var_dir" != / ] && symlink_path="$symlink_path/" - symlink_path="$symlink_path$subpath" - - dump " shared file path: $shared_path" - dump " symlink path: $symlink_path" - - database[$entry]="$var_name" - shared_paths[$entry]="$shared_path" - symlink_paths[$entry]="$symlink_path" - done -} - -remove_entry() { - local entry - for entry; do - unset -v 'database[$entry]' - unset -v 'shared_paths[$entry]' - unset -v 'symlink_paths[$entry]' - done -} - -read_database() { - [ ! -r "$db_path" ] && return 0 - - local entry - while IFS= read -d '' -r entry; do - add_entry "$entry" - done < "$db_path" -} - -write_database() { - is_dry_run && return 0 - - [ "${#database[@]}" -eq 0 ] && rm -f -- "$db_path" && return 0 - - > "$db_path" - - local entry - for entry in "${!database[@]}"; do - printf -- '%s\0' "$entry" >> "$db_path" - done -} - -link_entry() { - local entry - for entry; do - local shared_path="${shared_paths[$entry]}" - local symlink_path="${symlink_paths[$entry]}" - - local symlink_dir - symlink_dir="$( dirname -- "$symlink_path" )" - mkdir -p -- "$symlink_dir" - ln -f -s --no-target-directory -- "$shared_path" "$symlink_path" - done -} - -delete_obsolete_dirs() { - if [ "$#" -ne 2 ]; then - echo "usage: ${FUNCNAME[0]} BASE_DIR DIR" >&2 - return 1 - fi - - local base_dir="$1" - local dir="$2" - - base_dir="$( traverse_path --exist --directory -- "$base_dir" )" - dir="$( traverse_path --exist --directory -- "$dir" )" - - [ "$base_dir" = "$dir" ] && return 0 - - local subpath="${dir##"$base_dir"/}" - - if [ "$subpath" = "$dir" ]; then - dump "base directory: $base_dir" >&2 - dump "... is not a parent of: $dir" >&2 - return 1 - fi - - ( cd -- "$base_dir/" && rmdir -p --ignore-fail-on-non-empty -- "$subpath" ) -} - -unlink_entry() { - local entry - for entry; do - local shared_path="${shared_paths[$entry]}" - local symlink_path="${symlink_paths[$entry]}" - - rm -f -- "$symlink_path" - - local symlink_dir - symlink_dir="$( dirname -- "$symlink_path" )" - local var_name="${database[$entry]}" - local symlink_var_dir - symlink_var_dir="$( resolve_variable "$var_name" )" - delete_obsolete_dirs "$symlink_var_dir" "$symlink_dir" || true - done -} - -symlink_present() { - local entry - for entry; do - local symlink_path="${symlink_paths[$entry]}" - test -L "$symlink_path" -o -e "$symlink_path" - done -} - -symlink_points_to_shared_file() { - symlink_present "$@" - local entry - for entry; do - local shared_path="${shared_paths[$entry]}" - shared_path="$( traverse_path -- "$shared_path" )" - local symlink_path="${symlink_paths[$entry]}" - local target_path - target_path="$( traverse_path -- "$symlink_path" )" - test "$target_path" = "$shared_path" - done -} - -shared_file_present() { - local entry - for entry; do - local shared_path="${shared_paths[$entry]}" - test -L "$shared_path" -o -e "$shared_path" - done -} - -link_all_entries() { - local -a shared_var_dirs=() - local shared_var_dir - - find "$shared_root_dir" \ - -mindepth 1 -maxdepth 1 \ - -\( -type d -o -type l -\) \ - -regextype posix-basic \ - -regex ".*/$var_name_regex\$" \ - -printf '%P\0' | - while IFS= read -d '' -r shared_var_dir; do - shared_var_dirs+=("$shared_var_dir") - done - - for shared_var_dir in ${shared_var_dirs[@]+"${shared_var_dirs[@]}"}; do - dump "shared directory: $shared_root_dir$shared_var_dir" - local shared_path - - find "$shared_root_dir$shared_var_dir/" -\( -type f -o -type l -\) -print0 | - while IFS= read -d '' -r shared_path; do - dump " shared file path: $shared_path" - local entry="${shared_path:${#shared_root_dir}}" - add_entry "$entry" > /dev/null - dump " symlink path: ${symlink_paths[$entry]}" - - if symlink_present "$entry"; then - if symlink_points_to_shared_file "$entry"; then - dump ' ... up-to-date' - else - dump " ... not a symlink or doesn't point to the shared file, adding a symlink" - is_dry_run || link_entry "$entry" - fi - else - dump ' ... adding a symlink' - is_dry_run || link_entry "$entry" - fi - done - done -} - -unlink_all_entries() { - local entry - for entry in "${!database[@]}"; do - dump "entry: $entry" - local shared_path="${shared_paths[$entry]}" - local symlink_path="${symlink_paths[$entry]}" - dump " shared file path: $shared_path" - dump " symlink path: $symlink_path" - - if symlink_points_to_shared_file "$entry"; then - dump ' ... removing the symlink' - is_dry_run || unlink_entry "$entry" - remove_entry "$entry" - else - dump " ... not a symlink or doesn't point to the shared file" - remove_entry "$entry" - fi - done -} - -unlink_obsolete_entries() { - local entry - for entry in "${!database[@]}"; do - dump "entry: $entry" - local shared_path="${shared_paths[$entry]}" - local symlink_path="${symlink_paths[$entry]}" - dump " shared file path: $shared_path" - dump " symlink path: $symlink_path" - - if symlink_points_to_shared_file "$entry"; then - if shared_file_present "$entry"; then - dump ' ... up-to-date' - else - dump ' ... obsolete' - is_dry_run || unlink_entry "$entry" - remove_entry "$entry" - fi - else - dump " ... not a symlink or doesn't point to the shared file" - remove_entry "$entry" - fi - done -} - -parse_mode() { - if [ "$#" -ne 1 ]; then - echo "usage: ${FUNCNAME[0]} MODE" >&2 - return 1 - fi - - local mode="$1" - shift - - if [ -z "$mode" ]; then - dump "mode cannot be empty" >&2 - return 1 - fi - - echo "$mode" -} - -chmod_entries() { - if [ "$#" -ne 1 ]; then - echo "usage: ${FUNCNAME[0]} MODE" >&2 - return 1 - fi - - local mode="$1" - shift - - dump "applying mode $mode to shared files..." - if [ "${#shared_paths[@]}" -ne 0 ]; then - is_dry_run || chmod -- "$mode" ${shared_paths[@]+"${shared_paths[@]}"} - fi -} |