#!/usr/bin/env bash BASEDIR="$PWD" ENVDIR="$PWD/env" usage() { cat < [arguments] Commands: help This help text list List environments clear Delete all environment and revert to flat config/files new Create a new environment switch Switch to a different environment delete Delete an environment rename Rename the current environment diff Show differences between current state and environment save Save your changes to the environment revert Revert your changes since last save Options: EOF exit ${1:-1} } error() { echo "$0: $*" exit 1 } ask_bool() { local DEFAULT="$1"; shift local def defstr val case "$DEFAULT" in 1) def=0; defstr="Y/n";; 0) def=1; defstr="y/N";; *) def=; defstr="y/n";; esac while [ -z "$val" ]; do local VAL echo -n "$* ($defstr): " read VAL case "$VAL" in y*|Y*) val=0;; n*|N*) val=1;; *) val="$def";; esac done return "$val" } env_init() { local CREATE="$1" if [ -z "$CREATE" ]; then [ -d "$ENVDIR" ] || exit 0 fi [ -x "$(which git 2>/dev/null)" ] || error "Git is not installed" mkdir -p "$ENVDIR" || error "Failed to create the environment directory" cd "$ENVDIR" || error "Failed to switch to the environment directory" [ -d .git ] || { git init && touch .config && mkdir files && git add . && git commit -q -m "Initial import" } || { rm -rf .git error "Failed to initialize the environment directory" } } env_sync_data() { [ \! -L "$BASEDIR/.config" -a -f "$BASEDIR/.config" ] && mv "$BASEDIR/.config" "$ENVDIR" git add . git add -u } env_sync() { local STR="$1" env_sync_data git commit -m "${STR:-Update} at $(date)" } env_link_config() { rm -f "$BASEDIR/.config" ln -s env/.config "$BASEDIR/.config" mkdir -p "$ENVDIR/files" [ -L "$BASEDIR/files" ] || ln -s env/files "$BASEDIR/files" } env_do_reset() { git reset --hard HEAD git clean -d -f } env_list() { env_init git branch | grep -vE '^. master$' } env_diff() { env_init env_sync_data git diff --cached env_link_config } env_save() { env_init env_sync env_link_config } env_revert() { env_init env_do_reset env_link_config } env_ask_sync() { env_sync_data LINES="$(env_diff | wc -l)" # implies env_init [ "$LINES" -gt 0 ] && { if ask_bool 1 "Do you want to save your changes"; then env_sync else env_do_reset fi } } env_clear() { env_init [ -L "$BASEDIR/.config" ] && rm -f "$BASEDIR/.config" [ -L "$BASEDIR/files" ] && rm -f "$BASEDIR/files" [ -f "$ENVDIR/.config" ] || ( cd "$ENVDIR/files" && find | grep -vE '^\.$' > /dev/null ) env_sync_data if ask_bool 1 "Do you want to keep your current config and files"; then mkdir -p "$BASEDIR/files" cp -a "$ENVDIR/files/*" "$BASEDIR/files" 2>/dev/null >/dev/null cp "$ENVDIR/.config" "$BASEDIR/" else rm -rf "$BASEDIR/files" "$BASEDIR/.config" fi cd "$BASEDIR" rm -rf "$ENVDIR" } env_delete() { local name="${1##*/}" env_init [ -z "$name" ] && usage branch="$(git branch | grep '^\* ' | awk '{print $2}')" [ "$name" = "$branch" ] && error "cannot delete the currently selected environment" git branch -D "$name" } env_switch() { local name="${1##*/}" [ -z "$name" ] && usage env_init env_ask_sync git checkout "$name" || error "environment '$name' not found" env_link_config } env_rename() { local NAME="${1##*/}" env_init git branch -m "$NAME" } env_new() { local NAME="$1" local branch local from="master" [ -z "$NAME" ] && usage env_init 1 branch="$(git branch | grep '^\* ' | awk '{print $2}')" if [ -n "$branch" -a "$branch" != "master" ]; then env_ask_sync if ask_bool 0 "Do you want to clone the current environment?"; then from="$branch" fi rm -f "$BASEDIR/.config" "$BASEDIR/files" fi git checkout -b "$1" "$from" if [ -f "$BASEDIR/.config" -o -d "$BASEDIR/files" ]; then if ask_bool 1 "Do you want to keep your current config and files?"; then [ -d "$BASEDIR/files" -a \! -L "$BASEDIR/files" ] && { mv "$BASEDIR/files/"* "$ENVDIR/" 2>/dev/null rmdir "$BASEDIR/files" } env_sync else rm -rf "$BASEDIR/.config" "$BASEDIR/files" fi fi env_link_config } COMMAND="$1"; shift case "$COMMAND" in help) usage 0;; new) env_new "$@";; list) env_list "$@";; clear) env_clear "$@";; switch) env_switch "$@";; delete) env_delete "$@";; rename) env_rename "$@";; diff) env_diff "$@";; save) env_save "$@";; revert) env_revert "$@";; *) usage;; esac #n23'>23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326