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TheLocehiliosan_yadm/yadm
Ross Smith II fecbb315df
Add 'shellcheck shell=bash' as the default 
See https://github.com/koalaman/shellcheck/wiki/Directive#shell

Signed-off-by: Ross Smith II <ross@smithii.com>
2021-01-10 18:49:28 -08:00

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#!/bin/sh
# shellcheck shell=bash
# yadm - Yet Another Dotfiles Manager
# Copyright (C) 2015-2021 Tim Byrne
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
# execute script with bash (shebang line is /bin/sh for portability)
if [ -z "$BASH_VERSION" ]; then
[ "$YADM_TEST" != 1 ] && exec bash "$0" "$@"
fi
VERSION=3.0.2
YADM_WORK="$HOME"
YADM_DIR=
YADM_DATA=
YADM_LEGACY_DIR="${HOME}/.yadm"
YADM_LEGACY_ARCHIVE="files.gpg"
# these are the default paths relative to YADM_DIR
YADM_CONFIG="config"
YADM_ENCRYPT="encrypt"
YADM_BOOTSTRAP="bootstrap"
YADM_HOOKS="hooks"
YADM_ALT="alt"
# these are the default paths relative to YADM_DATA
YADM_REPO="repo.git"
YADM_ARCHIVE="archive"
HOOK_COMMAND=""
FULL_COMMAND=""
GPG_PROGRAM="gpg"
OPENSSL_PROGRAM="openssl"
GIT_PROGRAM="git"
AWK_PROGRAM=("gawk" "awk")
GIT_CRYPT_PROGRAM="git-crypt"
TRANSCRYPT_PROGRAM="transcrypt"
J2CLI_PROGRAM="j2"
ENVTPL_PROGRAM="envtpl"
ESH_PROGRAM="esh"
LSB_RELEASE_PROGRAM="lsb_release"
OS_RELEASE="/etc/os-release"
PROC_VERSION="/proc/version"
OPERATING_SYSTEM="Unknown"
ENCRYPT_INCLUDE_FILES="unparsed"
LEGACY_WARNING_ISSUED=0
INVALID_ALT=()
GPG_OPTS=()
OPENSSL_OPTS=()
# flag causing path translations with cygpath
USE_CYGPATH=0
# flag when something may have changes (which prompts auto actions to be performed)
CHANGES_POSSIBLE=0
# flag when a bootstrap should be performed after cloning
# 0: skip auto_bootstrap, 1: ask, 2: perform bootstrap, 3: prevent bootstrap
DO_BOOTSTRAP=0
function main() {
require_git
# capture full command, for passing to hooks
# the parameters will be space delimited and
# spaces, tabs, and backslashes will be escaped
_tab=$'\t'
for param in "$@"; do
param="${param//\\/\\\\}"
param="${param//$_tab/\\$_tab}"
param="${param// /\\ }"
_fc+=( "$param" )
done
FULL_COMMAND="${_fc[*]}"
# create the YADM_DIR & YADM_DATA if they doesn't exist yet
[ -d "$YADM_DIR" ] || mkdir -p "$YADM_DIR"
[ -d "$YADM_DATA" ] || mkdir -p "$YADM_DATA"
# parse command line arguments
local retval=0
internal_commands="^(alt|bootstrap|clean|clone|config|decrypt|encrypt|enter|git-crypt|help|--help|init|introspect|list|perms|transcrypt|upgrade|version|--version)$"
if [ -z "$*" ] ; then
# no argumnts will result in help()
help
elif [[ "$1" =~ $internal_commands ]] ; then
# for internal commands, process all of the arguments
YADM_COMMAND="${1//-/_}"
YADM_COMMAND="${YADM_COMMAND/__/}"
YADM_ARGS=()
shift
# commands listed below do not process any of the parameters
if [[ "$YADM_COMMAND" =~ ^(enter|git_crypt)$ ]] ; then
YADM_ARGS=("$@")
else
while [[ $# -gt 0 ]] ; do
key="$1"
case $key in
-a) # used by list()
LIST_ALL="YES"
;;
-d) # used by all commands
DEBUG="YES"
;;
-f) # used by init(), clone() and upgrade()
FORCE="YES"
;;
-l) # used by decrypt()
DO_LIST="YES"
[ "$YADM_COMMAND" = "config" ] && YADM_ARGS+=("$1")
;;
-w) # used by init() and clone()
if [[ ! "$2" =~ ^/ ]] ; then
error_out "You must specify a fully qualified work tree"
fi
YADM_WORK="$2"
shift
;;
*) # any unhandled arguments
YADM_ARGS+=("$1")
;;
esac
shift
done
fi
[ ! -d "$YADM_WORK" ] && error_out "Work tree does not exist: [$YADM_WORK]"
HOOK_COMMAND="$YADM_COMMAND"
invoke_hook "pre"
$YADM_COMMAND "${YADM_ARGS[@]}"
else
# any other commands are simply passed through to git
HOOK_COMMAND="$1"
invoke_hook "pre"
git_command "$@"
retval="$?"
fi
# process automatic events
auto_alt
auto_perms
auto_bootstrap
exit_with_hook $retval
}
# ****** Alternate Processing ******
function score_file() {
src="$1"
tgt="${src%%##*}"
conditions="${src#*##}"
if [ "${tgt#$YADM_ALT/}" != "${tgt}" ]; then
tgt="${YADM_BASE}/${tgt#$YADM_ALT/}"
fi
score=0
IFS=',' read -ra fields <<< "$conditions"
for field in "${fields[@]}"; do
label=${field%%.*}
value=${field#*.}
[ "$field" = "$label" ] && value="" # when .value is omitted
# extension isn't a condition and doesn't affect the score
if [[ "$label" =~ ^(e|extension)$ ]]; then
continue
fi
score=$((score + 1000))
# default condition
if [[ "$label" =~ ^(default)$ ]]; then
score=$((score + 0))
# variable conditions
elif [[ "$label" =~ ^(o|os)$ ]]; then
if [ "$value" = "$local_system" ]; then
score=$((score + 1))
else
score=0
return
fi
elif [[ "$label" =~ ^(d|distro)$ ]]; then
if [ "$value" = "$local_distro" ]; then
score=$((score + 2))
else
score=0
return
fi
elif [[ "$label" =~ ^(c|class)$ ]]; then
if [ "$value" = "$local_class" ]; then
score=$((score + 4))
else
score=0
return
fi
elif [[ "$label" =~ ^(h|hostname)$ ]]; then
if [ "$value" = "$local_host" ]; then
score=$((score + 8))
else
score=0
return
fi
elif [[ "$label" =~ ^(u|user)$ ]]; then
if [ "$value" = "$local_user" ]; then
score=$((score + 16))
else
score=0
return
fi
# templates
elif [[ "$label" =~ ^(t|template|yadm)$ ]]; then
score=0
cmd=$(choose_template_cmd "$value")
if [ -n "$cmd" ]; then
record_template "$tgt" "$cmd" "$src"
else
debug "No supported template processor for template $src"
[ -n "$loud" ] && echo "No supported template processor for template $src"
fi
return 0
# unsupported values
else
if [[ "${src##*/}" =~ .\#\#. ]]; then
INVALID_ALT+=("$src")
fi
score=0
return
fi
done
record_score "$score" "$tgt" "$src"
}
function record_score() {
score="$1"
tgt="$2"
src="$3"
# record nothing if the score is zero
[ "$score" -eq 0 ] && return
# search for the index of this target, to see if we already are tracking it
index=-1
for search_index in "${!alt_targets[@]}"; do
if [ "${alt_targets[$search_index]}" = "$tgt" ]; then
index="$search_index"
break
fi
done
# if we don't find an existing index, create one by appending to the array
if [ "$index" -eq -1 ]; then
# $YADM_CONFIG must be processed first, in case other templates lookup yadm configurations
if [ "$tgt" = "$YADM_CONFIG" ]; then
alt_targets=("$tgt" "${alt_targets[@]}")
alt_sources=("$src" "${alt_sources[@]}")
alt_scores=(0 "${alt_scores[@]}")
index=0
# increase the index of any existing alt_template_cmds
new_cmds=()
for cmd_index in "${!alt_template_cmds[@]}"; do
new_cmds[$((cmd_index+1))]="${alt_template_cmds[$cmd_index]}"
done
alt_template_cmds=()
for cmd_index in "${!new_cmds[@]}"; do
alt_template_cmds[$cmd_index]="${new_cmds[$cmd_index]}"
done
else
alt_targets+=("$tgt")
# set index to the last index (newly created one)
for index in "${!alt_targets[@]}"; do :; done
# and set its initial score to zero
alt_scores[$index]=0
fi
fi
# record nothing if a template command is registered for this file
[ "${alt_template_cmds[$index]+isset}" ] && return
# record higher scoring sources
if [ "$score" -gt "${alt_scores[$index]}" ]; then
alt_scores[$index]="$score"
alt_sources[$index]="$src"
fi
}
function record_template() {
tgt="$1"
cmd="$2"
src="$3"
# search for the index of this target, to see if we already are tracking it
index=-1
for search_index in "${!alt_targets[@]}"; do
if [ "${alt_targets[$search_index]}" = "$tgt" ]; then
index="$search_index"
break
fi
done
# if we don't find an existing index, create one by appending to the array
if [ "$index" -eq -1 ]; then
alt_targets+=("$tgt")
# set index to the last index (newly created one)
for index in "${!alt_targets[@]}"; do :; done
fi
# record the template command, last one wins
alt_template_cmds[$index]="$cmd"
alt_sources[$index]="$src"
}
function choose_template_cmd() {
kind="$1"
if [ "$kind" = "default" ] || [ "$kind" = "" ] && awk_available; then
echo "template_default"
elif [ "$kind" = "esh" ] && esh_available; then
echo "template_esh"
elif [ "$kind" = "j2cli" ] || [ "$kind" = "j2" ] && j2cli_available; then
echo "template_j2cli"
elif [ "$kind" = "envtpl" ] || [ "$kind" = "j2" ] && envtpl_available; then
echo "template_envtpl"
else
return # this "kind" of template is not supported
fi
}
# ****** Template Processors ******
function template_default() {
input="$1"
output="$2"
temp_file="${output}.$$.$RANDOM"
# the explicit "space + tab" character class used below is used because not
# all versions of awk seem to support the POSIX character classes [[:blank:]]
awk_pgm=$(cat << "EOF"
# built-in default template processor
BEGIN {
blank = "[ ]"
c["class"] = class
c["os"] = os
c["hostname"] = host
c["user"] = user
c["distro"] = distro
c["source"] = source
ifs = "^{%" blank "*if"
els = "^{%" blank "*else" blank "*%}$"
end = "^{%" blank "*endif" blank "*%}$"
skp = "^{%" blank "*(if|else|endif)"
vld = conditions()
inc_start = "^{%" blank "*include" blank "+\"?"
inc_end = "\"?" blank "*%}$"
inc = inc_start ".+" inc_end
prt = 1
err = 0
}
END { exit err }
{ replace_vars() } # variable replacements
$0 ~ vld, $0 ~ end {
if ($0 ~ vld || $0 ~ end) prt=1;
if ($0 ~ els) prt=0;
if ($0 ~ skp) next;
}
($0 ~ ifs && $0 !~ vld), $0 ~ end {
if ($0 ~ ifs && $0 !~ vld) prt=0;
if ($0 ~ els || $0 ~ end) prt=1;
if ($0 ~ skp) next;
}
{ if (!prt) next }
$0 ~ inc {
file = $0
sub(inc_start, "", file)
sub(inc_end, "", file)
sub(/^[^\/].*$/, source_dir "/&", file)
while ((res = getline <file) > 0) {
replace_vars()
print
}
if (res < 0) {
printf "%s:%d: error: could not read '%s'\n", FILENAME, NR, file | "cat 1>&2"
err = 1
}
close(file)
next
}
{ print }
function replace_vars() {
for (label in c) {
gsub(("{{" blank "*yadm\\." label blank "*}}"), c[label])
}
}
function conditions() {
pattern = ifs blank "*("
for (label in c) {
value = c[label]
gsub(/[\\.^$(){}\[\]|*+?]/, "\\\\&", value)
pattern = sprintf("%syadm\\.%s" blank "*==" blank "*\"%s\"|", pattern, label, value)
}
sub(/\|$/,")",pattern)
return pattern
}
EOF
)
"${AWK_PROGRAM[0]}" \
-v class="$local_class" \
-v os="$local_system" \
-v host="$local_host" \
-v user="$local_user" \
-v distro="$local_distro" \
-v source="$input" \
-v source_dir="$(dirname "$input")" \
"$awk_pgm" \
"$input" > "$temp_file" || rm -f "$temp_file"
if [ -f "$temp_file" ] ; then
copy_perms "$input" "$temp_file"
mv -f "$temp_file" "$output"
fi
}
function template_j2cli() {
input="$1"
output="$2"
temp_file="${output}.$$.$RANDOM"
YADM_CLASS="$local_class" \
YADM_OS="$local_system" \
YADM_HOSTNAME="$local_host" \
YADM_USER="$local_user" \
YADM_DISTRO="$local_distro" \
YADM_SOURCE="$input" \
"$J2CLI_PROGRAM" "$input" -o "$temp_file"
if [ -f "$temp_file" ] ; then
copy_perms "$input" "$temp_file"
mv -f "$temp_file" "$output"
fi
}
function template_envtpl() {
input="$1"
output="$2"
temp_file="${output}.$$.$RANDOM"
YADM_CLASS="$local_class" \
YADM_OS="$local_system" \
YADM_HOSTNAME="$local_host" \
YADM_USER="$local_user" \
YADM_DISTRO="$local_distro" \
YADM_SOURCE="$input" \
"$ENVTPL_PROGRAM" --keep-template "$input" -o "$temp_file"
if [ -f "$temp_file" ] ; then
copy_perms "$input" "$temp_file"
mv -f "$temp_file" "$output"
fi
}
function template_esh() {
input="$1"
output="$2"
temp_file="${output}.$$.$RANDOM"
"$ESH_PROGRAM" -o "$temp_file" "$input" \
YADM_CLASS="$local_class" \
YADM_OS="$local_system" \
YADM_HOSTNAME="$local_host" \
YADM_USER="$local_user" \
YADM_DISTRO="$local_distro" \
YADM_SOURCE="$input"
if [ -f "$temp_file" ] ; then
copy_perms "$input" "$temp_file"
mv -f "$temp_file" "$output"
fi
}
# ****** yadm Commands ******
function alt() {
require_repo
parse_encrypt
# gather values for processing alternates
local local_class
local local_system
local local_host
local local_user
local local_distro
set_local_alt_values
# only be noisy if the "alt" command was run directly
local loud=
[ "$YADM_COMMAND" = "alt" ] && loud="YES"
# decide if a copy should be done instead of a symbolic link
local do_copy=0
[ "$(config --bool yadm.alt-copy)" == "true" ] && do_copy=1
cd_work "Alternates" || return
# determine all tracked files
local tracked_files=()
local IFS=$'\n'
for tracked_file in $("$GIT_PROGRAM" ls-files | LC_ALL=C sort); do
tracked_files+=("$tracked_file")
done
# generate data for removing stale links
local possible_alts=()
local IFS=$'\n'
for possible_alt in "${tracked_files[@]}" "${ENCRYPT_INCLUDE_FILES[@]}"; do
if [[ $possible_alt =~ .\#\#. ]]; then
base_alt="${possible_alt%%##*}"
yadm_alt="${YADM_BASE}/${base_alt}"
if [ "${yadm_alt#$YADM_ALT/}" != "${yadm_alt}" ]; then
base_alt="${yadm_alt#$YADM_ALT/}"
fi
possible_alts+=("$YADM_BASE/${base_alt}")
fi
done
local alt_linked=()
alt_linking
remove_stale_links
report_invalid_alts
}
function report_invalid_alts() {
[ "$LEGACY_WARNING_ISSUED" = "1" ] && return
[ "${#INVALID_ALT[@]}" = "0" ] && return
local path_list
for invalid in "${INVALID_ALT[@]}"; do
path_list="$path_list * $invalid"$'\n'
done
cat <<EOF >&2
**WARNING**
Invalid alternates have been detected.
Beginning with version 2.0.0, yadm uses a new naming convention for alternate
files. Read more about this change here:
https://yadm.io/docs/upgrade_from_1
Or to learn more about alternates in general, read:
https://yadm.io/docs/alternates
To rename the invalid alternates run:
yadm mv <old name> <new name>
Invalid alternates detected:
${path_list}
***********
EOF
}
function remove_stale_links() {
# review alternate candidates for stale links
# if a possible alt IS linked, but it's source is not part of alt_linked,
# remove it.
if readlink_available; then
for stale_candidate in "${possible_alts[@]}"; do
if [ -L "$stale_candidate" ]; then
src=$(readlink "$stale_candidate" 2>/dev/null)
if [ -n "$src" ]; then
for review_link in "${alt_linked[@]}"; do
[ "$src" = "$review_link" ] && continue 2
done
rm -f "$stale_candidate"
fi
fi
done
fi
}
function set_local_alt_values() {
local_class="$(config local.class)"
local_system="$(config local.os)"
if [ -z "$local_system" ] ; then
local_system="$OPERATING_SYSTEM"
fi
local_host="$(config local.hostname)"
if [ -z "$local_host" ] ; then
local_host=$(uname -n)
local_host=${local_host%%.*} # trim any domain from hostname
fi
local_user="$(config local.user)"
if [ -z "$local_user" ] ; then
local_user=$(id -u -n)
fi
local_distro="$(query_distro)"
}
function alt_linking() {
local alt_scores=()
local alt_targets=()
local alt_sources=()
local alt_template_cmds=()
for alt_path in $(for tracked in "${tracked_files[@]}"; do printf "%s\n" "$tracked" "${tracked%/*}"; done | LC_ALL=C sort -u) "${ENCRYPT_INCLUDE_FILES[@]}"; do
alt_path="$YADM_BASE/$alt_path"
if [[ "$alt_path" =~ .\#\#. ]]; then
if [ -e "$alt_path" ] ; then
score_file "$alt_path"
fi
fi
done
for index in "${!alt_targets[@]}"; do
tgt="${alt_targets[$index]}"
src="${alt_sources[$index]}"
template_cmd="${alt_template_cmds[$index]}"
if [ -n "$template_cmd" ]; then
# a template is defined, process the template
debug "Creating $tgt from template $src"
[ -n "$loud" ] && echo "Creating $tgt from template $src"
# ensure the destination path exists
assert_parent "$tgt"
# remove any existing symlink before processing template
[ -L "$tgt" ] && rm -f "$tgt"
"$template_cmd" "$src" "$tgt"
elif [ -n "$src" ]; then
# a link source is defined, create symlink
debug "Linking $src to $tgt"
[ -n "$loud" ] && echo "Linking $src to $tgt"
# ensure the destination path exists
assert_parent "$tgt"
if [ "$do_copy" -eq 1 ]; then
# remove any existing symlink before copying
[ -L "$tgt" ] && rm -f "$tgt"
cp -f "$src" "$tgt"
else
ln_relative "$src" "$tgt"
fi
fi
done
}
function ln_relative() {
local full_source full_target target_dir
local full_source="$1"
local full_target="$2"
local target_dir="${full_target%/*}"
if [ "$target_dir" == "" ]; then
target_dir="/"
fi
local rel_source
rel_source=$(relative_path "$target_dir" "$full_source")
ln -nfs "$rel_source" "$full_target"
alt_linked+=("$rel_source")
}
function bootstrap() {
bootstrap_available || error_out "Cannot execute bootstrap\n'$YADM_BOOTSTRAP' is not an executable program."
# GIT_DIR should not be set for user's bootstrap code
unset GIT_DIR
echo "Executing $YADM_BOOTSTRAP"
exec "$YADM_BOOTSTRAP"
}
function clean() {
error_out "\"git clean\" has been disabled for safety. You could end up removing all unmanaged files."
}
function _default_remote_branch() {
local ls_remote
ls_remote=$("$GIT_PROGRAM" ls-remote -q --symref "$1" 2>/dev/null)
match="^ref:[[:blank:]]+refs/heads/([^[:blank:]]+)"
if [[ "$ls_remote" =~ $match ]] ; then
echo "${BASH_REMATCH[1]}"
else
echo master
fi
}
function clone() {
DO_BOOTSTRAP=1
local branch=
local repo_url=
while [[ $# -gt 0 ]] ; do
key="$1"
case $key in
-b)
if ! is_valid_branch_name "$2"; then
error_out "You must provide a branch name when using '-b'"
fi
branch="$2"
shift
;;
--bootstrap) # force bootstrap, without prompt
DO_BOOTSTRAP=2
;;
--no-bootstrap) # prevent bootstrap, without prompt
DO_BOOTSTRAP=3
;;
*) # use first found argument as the URL
[ -z "$repo_url" ] && repo_url="$1"
;;
esac
shift
done
[ -z "$repo_url" ] && error_out "No repository provided"
[ -z "$branch" ] && branch=$(_default_remote_branch "$repo_url")
[ -n "$DEBUG" ] && display_private_perms "initial"
# shellcheck disable=SC2119
# clone will begin with a bare repo
init
# configure local HEAD with the correct branch
printf 'ref: refs/heads/%s\n' "$branch" > "${YADM_REPO}/HEAD"
# add the specified remote, and configure the repo to track origin/$branch
debug "Adding remote to new repo"
"$GIT_PROGRAM" remote add origin "$repo_url"
debug "Configuring new repo to track origin/${branch}"
"$GIT_PROGRAM" config "branch.${branch}.remote" origin
"$GIT_PROGRAM" config "branch.${branch}.merge" "refs/heads/${branch}"
# fetch / merge (and possibly fallback to reset)
debug "Doing an initial fetch of the origin"
"$GIT_PROGRAM" fetch origin || {
debug "Removing repo after failed clone"
rm -rf "$YADM_REPO"
error_out "Unable to fetch origin $repo_url"
}
debug "Verifying '${branch}' is a valid branch to merge"
[ -f "${YADM_REPO}/refs/remotes/origin/${branch}" ] || {
debug "Removing repo after failed clone"
rm -rf "$YADM_REPO"
error_out "Clone failed, 'origin/${branch}' does not exist in $repo_url"
}
if [ "$YADM_WORK" = "$HOME" ]; then
debug "Determining if repo tracks private directories"
for private_dir in $(private_dirs all); do
found_log=$("$GIT_PROGRAM" log -n 1 "origin/${branch}" -- "$private_dir" 2>/dev/null)
if [ -n "$found_log" ]; then
debug "Private directory $private_dir is tracked by repo"
assert_private_dirs "$private_dir"
fi
done
fi
[ -n "$DEBUG" ] && display_private_perms "pre-merge"
debug "Doing an initial merge of origin/${branch}"
"$GIT_PROGRAM" merge "origin/${branch}" || {
debug "Merge failed, doing a reset and stashing conflicts."
"$GIT_PROGRAM" reset "origin/${branch}"
if cd "$YADM_WORK"; then # necessary because of a bug in Git
"$GIT_PROGRAM" -c user.name='yadm clone' -c user.email='yadm' stash save Conflicts preserved from yadm clone command 2>&1
cat <<EOF
**NOTE**
Merging origin/${branch} failed.
As a result, yadm did 'reset origin/${branch}', and then
stashed the conflicting data.
This likely happened because you had files in \$HOME
which conflicted with files tracked by origin/${branch}.
You can review the stashed conflicts with the
command 'yadm stash show -p' from within your
\$HOME directory. If you want to restore the
stashed data, you can run 'yadm stash apply' or
'yadm stash pop' and then handle the conflicts
in another way.
EOF
else
# skip auto_bootstrap if conflicts could not be stashed
DO_BOOTSTRAP=0
cat <<EOF
**NOTE**
Merging origin/${branch} failed.
yadm did 'reset origin/${branch}' instead.
yadm did not stash these conflicts beacuse it was unable
to change to the $YADM_WORK directory.
Please review and resolve any differences appropriately
If you know what you're doing, and want to overwrite the
tracked files, consider 'yadm reset --hard origin/${branch}'
EOF
fi
}
[ -n "$DEBUG" ] && display_private_perms "post-merge"
CHANGES_POSSIBLE=1
}
function config() {
use_repo_config=0
local_options="^local\.(class|os|hostname|user)$"
for option in "$@"; do
[[ "$option" =~ $local_options ]] && use_repo_config=1
done
if [ -z "$*" ] ; then
# with no parameters, provide some helpful documentation
echo "yadm supports the following configurations:"
echo
local IFS=$'\n'
for supported_config in $(introspect_configs); do
echo " ${supported_config}"
done
echo
cat << EOF
Please read the CONFIGURATION section in the man
page for more details about configurations, and
how to adjust them.
EOF
elif [ "$use_repo_config" -eq 1 ]; then
require_repo
# operate on the yadm repo's configuration file
# this is always local to the machine
"$GIT_PROGRAM" config "$@"
CHANGES_POSSIBLE=1
else
# make sure parent folder of config file exists
assert_parent "$YADM_CONFIG"
# operate on the yadm configuration file
"$GIT_PROGRAM" config --file="$(mixed_path "$YADM_CONFIG")" "$@"
fi
}
function _set_gpg_options() {
gpg_key="$(config yadm.gpg-recipient)"
if [ "$gpg_key" = "ASK" ]; then
GPG_OPTS=("--no-default-recipient" "-e")
elif [ "$gpg_key" != "" ]; then
GPG_OPTS=("-e" "-r $gpg_key")
else
GPG_OPTS=("-c")
fi
}
function _get_openssl_ciphername() {
OPENSSL_CIPHERNAME="$(config yadm.openssl-ciphername)"
if [ -z "$OPENSSL_CIPHERNAME" ]; then
OPENSSL_CIPHERNAME="aes-256-cbc"
fi
echo "$OPENSSL_CIPHERNAME"
}
function _set_openssl_options() {
cipher_name="$(_get_openssl_ciphername)"
OPENSSL_OPTS=("-${cipher_name}" -salt)
if [ "$(config --bool yadm.openssl-old)" == "true" ]; then
OPENSSL_OPTS+=(-md md5)
else
OPENSSL_OPTS+=(-pbkdf2 -iter 100000 -md sha512)
fi
}
function _get_cipher() {
output_archive="$1"
yadm_cipher="$(config yadm.cipher)"
if [ -z "$yadm_cipher" ]; then
yadm_cipher="gpg"
fi
}
function _decrypt_from() {
local output_archive
local yadm_cipher
_get_cipher "$1"
case "$yadm_cipher" in
gpg)
require_gpg
$GPG_PROGRAM -d "$output_archive"
;;
openssl)
require_openssl
_set_openssl_options
$OPENSSL_PROGRAM enc -d "${OPENSSL_OPTS[@]}" -in "$output_archive"
;;
*)
error_out "Unknown cipher '$yadm_cipher'"
;;
esac
}
function _encrypt_to() {
local output_archive
local yadm_cipher
_get_cipher "$1"
case "$yadm_cipher" in
gpg)
require_gpg
_set_gpg_options
$GPG_PROGRAM --yes "${GPG_OPTS[@]}" --output "$output_archive"
;;
openssl)
require_openssl
_set_openssl_options
$OPENSSL_PROGRAM enc -e "${OPENSSL_OPTS[@]}" -out "$output_archive"
;;
*)
error_out "Unknown cipher '$yadm_cipher'"
;;
esac
}
function decrypt() {
require_archive
[ -f "$YADM_ENCRYPT" ] && exclude_encrypted
if [ "$DO_LIST" = "YES" ] ; then
tar_option="t"
else
tar_option="x"
fi
# decrypt the archive
if (_decrypt_from "$YADM_ARCHIVE" || echo 1) | tar v${tar_option}f - -C "$YADM_WORK"; then
[ ! "$DO_LIST" = "YES" ] && echo "All files decrypted."
else
error_out "Unable to extract encrypted files."
fi
CHANGES_POSSIBLE=1
}
function encrypt() {
require_encrypt
exclude_encrypted
parse_encrypt
cd_work "Encryption" || return
# report which files will be encrypted
echo "Encrypting the following files:"
printf '%s\n' "${ENCRYPT_INCLUDE_FILES[@]}"
echo
# encrypt all files which match the globs
if tar -f - -c "${ENCRYPT_INCLUDE_FILES[@]}" | _encrypt_to "$YADM_ARCHIVE"; then
echo "Wrote new file: $YADM_ARCHIVE"
else
error_out "Unable to write $YADM_ARCHIVE"
fi
# offer to add YADM_ARCHIVE if untracked
archive_status=$("$GIT_PROGRAM" status --porcelain -uall "$(mixed_path "$YADM_ARCHIVE")" 2>/dev/null)
archive_regex="^\?\?"
if [[ $archive_status =~ $archive_regex ]] ; then
echo "It appears that $YADM_ARCHIVE is not tracked by yadm's repository."
echo "Would you like to add it now? (y/n)"
read -r answer < /dev/tty
if [[ $answer =~ ^[yY]$ ]] ; then
"$GIT_PROGRAM" add "$(mixed_path "$YADM_ARCHIVE")"
fi
fi
CHANGES_POSSIBLE=1
}
function git_crypt() {
require_git_crypt
enter "${GIT_CRYPT_PROGRAM} $*"
}
function transcrypt() {
require_transcrypt
enter "${TRANSCRYPT_PROGRAM} $*"
}
function enter() {
command="$*"
require_shell
require_repo
local -a shell_opts
local shell_path=""
if [[ "$SHELL" =~ bash$ ]]; then
shell_opts=("--norc")
shell_path="\w"
elif [[ "$SHELL" =~ [cz]sh$ ]]; then
shell_opts=("-f")
if [[ "$SHELL" =~ zsh$ && "$TERM" = "dumb" ]]; then
# Disable ZLE for tramp
shell_opts+=("--no-zle")
fi
shell_path="%~"
fi
shell_cmd=()
if [ -n "$command" ]; then
shell_cmd=('-c' "$*")
fi
GIT_WORK_TREE="$YADM_WORK"
export GIT_WORK_TREE
[ "${#shell_cmd[@]}" -eq 0 ] && echo "Entering yadm repo"
yadm_prompt="yadm shell ($YADM_REPO) $shell_path > "
PROMPT="$yadm_prompt" PS1="$yadm_prompt" "$SHELL" "${shell_opts[@]}" "${shell_cmd[@]}"
return_code="$?"
if [ "${#shell_cmd[@]}" -eq 0 ]; then
echo "Leaving yadm repo"
else
exit_with_hook "$return_code"
fi
}
function git_command() {
require_repo
# translate 'gitconfig' to 'config' -- 'config' is reserved for yadm
if [ "$1" = "gitconfig" ] ; then
set -- "config" "${@:2}"
fi
# ensure private .ssh and .gnupg directories exist first
# TODO: consider restricting this to only commands which modify the work-tree
if [ "$YADM_WORK" = "$HOME" ]; then
auto_private_dirs=$(config --bool yadm.auto-private-dirs)
if [ "$auto_private_dirs" != "false" ] ; then
for pdir in $(private_dirs all); do
assert_private_dirs "$pdir"
done
fi
fi
CHANGES_POSSIBLE=1
# pass commands through to git
debug "Running git command $GIT_PROGRAM $*"
"$GIT_PROGRAM" "$@"
return "$?"
}
function help() {
cat << EOF
Usage: yadm <command> [options...]
Manage dotfiles maintained in a Git repository. Manage alternate files
for specific systems or hosts. Encrypt/decrypt private files.
Git Commands:
Any Git command or alias can be used as a <command>. It will operate
on yadm's repository and files in the work tree (usually \$HOME).
Commands:
yadm init [-f] - Initialize an empty repository
yadm clone <url> [-f] - Clone an existing repository
yadm config <name> <value> - Configure a setting
yadm list [-a] - List tracked files
yadm alt - Create links for alternates
yadm bootstrap - Execute \$HOME/.config/yadm/bootstrap
yadm encrypt - Encrypt files
yadm decrypt [-l] - Decrypt files
yadm perms - Fix perms for private files
yadm enter [COMMAND] - Run sub-shell with GIT variables set
yadm git-crypt [OPTIONS] - Run git-crypt commands for the yadm repo
yadm transcrypt [OPTIONS] - Run transcrypt commands for the yadm repo
Files:
\$HOME/.config/yadm/config - yadm's configuration file
\$HOME/.config/yadm/encrypt - List of globs to encrypt/decrypt
\$HOME/.config/yadm/bootstrap - Script run via: yadm bootstrap
\$HOME/.local/share/yadm/repo.git - yadm's Git repository
\$HOME/.local/share/yadm/archive - Encrypted data stored here
Use "man yadm" for complete documentation.
EOF
exit_with_hook 1
}
# shellcheck disable=SC2120
function init() {
# safety check, don't attempt to init when the repo is already present
[ -d "$YADM_REPO" ] && [ -z "$FORCE" ] &&
error_out "Git repo already exists. [$YADM_REPO]\nUse '-f' if you want to force it to be overwritten."
# remove existing if forcing the init to happen anyway
[ -d "$YADM_REPO" ] && {
debug "Removing existing repo prior to init"
rm -rf "$YADM_REPO"
}
# init a new bare repo
debug "Init new repo"
"$GIT_PROGRAM" init --shared=0600 --bare "$(mixed_path "$YADM_REPO")" "$@"
configure_repo
CHANGES_POSSIBLE=1
}
function introspect() {
case "$1" in
commands|configs|repo|switches)
"introspect_$1"
;;
esac
}
function introspect_commands() {
cat <<-EOF
alt
bootstrap
clean
clone
config
decrypt
encrypt
enter
git-crypt
gitconfig
help
init
introspect
list
perms
transcrypt
upgrade
version
EOF
}
function introspect_configs() {
cat <<-EOF
local.class
local.hostname
local.os
local.user
yadm.alt-copy
yadm.auto-alt
yadm.auto-exclude
yadm.auto-perms
yadm.auto-private-dirs
yadm.cipher
yadm.git-program
yadm.gpg-perms
yadm.gpg-program
yadm.gpg-recipient
yadm.openssl-ciphername
yadm.openssl-old
yadm.openssl-program
yadm.ssh-perms
EOF
}
function introspect_repo() {
echo "$YADM_REPO"
}
function introspect_switches() {
cat <<-EOF
--yadm-archive
--yadm-bootstrap
--yadm-config
--yadm-data
--yadm-dir
--yadm-encrypt
--yadm-repo
-Y
EOF
}
function list() {
require_repo
# process relative to YADM_WORK when --all is specified
if [ -n "$LIST_ALL" ] ; then
cd_work "List" || return
fi
# list tracked files
"$GIT_PROGRAM" ls-files
}
function perms() {
parse_encrypt
# TODO: prevent repeats in the files changed
cd_work "Perms" || return
GLOBS=()
# include the archive created by "encrypt"
[ -f "$YADM_ARCHIVE" ] && GLOBS+=("$YADM_ARCHIVE")
# only include private globs if using HOME as worktree
if [ "$YADM_WORK" = "$HOME" ]; then
# include all .ssh files (unless disabled)
if [[ $(config --bool yadm.ssh-perms) != "false" ]] ; then
GLOBS+=(".ssh" ".ssh/*" ".ssh/.[!.]*")
fi
# include all gpg files (unless disabled)
gnupghome="$(private_dirs gnupg)"
if [[ $(config --bool yadm.gpg-perms) != "false" ]] ; then
GLOBS+=("${gnupghome}" "${gnupghome}/*" "${gnupghome}/.[!.]*")
fi
fi
# include any files we encrypt
GLOBS+=("${ENCRYPT_INCLUDE_FILES[@]}")
# remove group/other permissions from collected globs
#shellcheck disable=SC2068
#(SC2068 is disabled because in this case, we desire globbing)
chmod -f go-rwx ${GLOBS[@]} &> /dev/null
# TODO: detect and report changing permissions in a portable way
}
function upgrade() {
local actions_performed=0
local -a submodules
local repo_updates=0
[[ -n "${YADM_OVERRIDE_REPO}${YADM_OVERRIDE_ARCHIVE}" || "$YADM_DATA" = "$YADM_DIR" ]] && \
error_out "Unable to upgrade. Paths have been overridden with command line options"
# choose a legacy repo, the version 2 location will be favored
local LEGACY_REPO=
[ -d "$YADM_LEGACY_DIR/repo.git" ] && LEGACY_REPO="$YADM_LEGACY_DIR/repo.git"
[ -d "$YADM_DIR/repo.git" ] && LEGACY_REPO="$YADM_DIR/repo.git"
# handle legacy repo
if [ -d "$LEGACY_REPO" ]; then
# choose
# legacy repo detected, it must be moved to YADM_REPO
if [ -e "$YADM_REPO" ]; then
error_out "Unable to upgrade. '$YADM_REPO' already exists. Refusing to overwrite it."
else
actions_performed=1
echo "Moving $LEGACY_REPO to $YADM_REPO"
export GIT_DIR="$LEGACY_REPO"
# Must absorb git dirs, otherwise deinit below will fail for modules that have
# been cloned first and then added as a submodule.
"$GIT_PROGRAM" submodule absorbgitdirs
local submodule_status
submodule_status=$("$GIT_PROGRAM" -C "$YADM_WORK" submodule status)
while read -r sha submodule rest; do
[ "$submodule" == "" ] && continue
if [[ "$sha" = -* ]]; then
continue
fi
"$GIT_PROGRAM" -C "$YADM_WORK" submodule deinit ${FORCE:+-f} -- "$submodule" || {
for other in "${submodules[@]}"; do
"$GIT_PROGRAM" -C "$YADM_WORK" submodule update --init --recursive -- "$other"
done
error_out "Unable to upgrade. Could not deinit submodule $submodule"
}
submodules+=("$submodule")
done <<< "$submodule_status"
assert_parent "$YADM_REPO"
mv "$LEGACY_REPO" "$YADM_REPO"
fi
fi
GIT_DIR="$YADM_REPO"
export GIT_DIR
# choose a legacy archive, the version 2 location will be favored
local LEGACY_ARCHIVE=
[ -e "$YADM_LEGACY_DIR/$YADM_LEGACY_ARCHIVE" ] && LEGACY_ARCHIVE="$YADM_LEGACY_DIR/$YADM_LEGACY_ARCHIVE"
[ -e "$YADM_DIR/$YADM_LEGACY_ARCHIVE" ] && LEGACY_ARCHIVE="$YADM_DIR/$YADM_LEGACY_ARCHIVE"
# handle legacy archive
if [ -e "$LEGACY_ARCHIVE" ]; then
actions_performed=1
echo "Moving $LEGACY_ARCHIVE to $YADM_ARCHIVE"
assert_parent "$YADM_ARCHIVE"
# test to see if path is "tracked" in repo, if so 'git mv' must be used
if "$GIT_PROGRAM" ls-files --error-unmatch "$LEGACY_ARCHIVE" &> /dev/null; then
"$GIT_PROGRAM" mv "$LEGACY_ARCHIVE" "$YADM_ARCHIVE" && repo_updates=1
else
mv -i "$LEGACY_ARCHIVE" "$YADM_ARCHIVE"
fi
fi
# handle any remaining version 1 paths
for legacy_path in \
"$YADM_LEGACY_DIR/config" \
"$YADM_LEGACY_DIR/encrypt" \
"$YADM_LEGACY_DIR/bootstrap" \
"$YADM_LEGACY_DIR"/hooks/{pre,post}_* \
;
do
if [ -e "$legacy_path" ]; then
new_filename=${legacy_path#$YADM_LEGACY_DIR/}
new_filename="$YADM_DIR/$new_filename"
actions_performed=1
echo "Moving $legacy_path to $new_filename"
assert_parent "$new_filename"
# test to see if path is "tracked" in repo, if so 'git mv' must be used
if "$GIT_PROGRAM" ls-files --error-unmatch "$legacy_path" &> /dev/null; then
"$GIT_PROGRAM" mv "$legacy_path" "$new_filename" && repo_updates=1
else
mv -i "$legacy_path" "$new_filename"
fi
fi
done
# handle submodules, which need to be reinitialized
for submodule in "${submodules[@]}"; do
"$GIT_PROGRAM" -C "$YADM_WORK" submodule update --init --recursive -- "$submodule"
done
[ "$actions_performed" -eq 0 ] && \
echo "No legacy paths found. Upgrade is not necessary"
[ "$repo_updates" -eq 1 ] && \
echo "Some files tracked by yadm have been renamed. These changes should probably be commited now."
exit 0
}
function version() {
echo "yadm $VERSION"
exit_with_hook 0
}
# ****** Utility Functions ******
function exclude_encrypted() {
auto_exclude=$(config --bool yadm.auto-exclude)
[ "$auto_exclude" == "false" ] && return 0
exclude_path="${YADM_REPO}/info/exclude"
newline=$'\n'
exclude_flag="# yadm-auto-excludes"
exclude_header="${exclude_flag}${newline}"
exclude_header="${exclude_header}# This section is managed by yadm."
exclude_header="${exclude_header}${newline}"
exclude_header="${exclude_header}# Any edits below will be lost."
exclude_header="${exclude_header}${newline}"
# do nothing if there is no YADM_ENCRYPT
[ -e "$YADM_ENCRYPT" ] || return 0
# read encrypt
encrypt_data=""
while IFS='' read -r line || [ -n "$line" ]; do
encrypt_data="${encrypt_data}${line}${newline}"
done < "$YADM_ENCRYPT"
# read info/exclude
unmanaged=""
managed=""
if [ -e "$exclude_path" ]; then
flag_seen=0
while IFS='' read -r line || [ -n "$line" ]; do
[ "$line" = "$exclude_flag" ] && flag_seen=1
if [ "$flag_seen" -eq 0 ]; then
unmanaged="${unmanaged}${line}${newline}"
else
managed="${managed}${line}${newline}"
fi
done < "$exclude_path"
fi
if [ "${exclude_header}${encrypt_data}" != "$managed" ]; then
debug "Updating ${exclude_path}"
assert_parent "$exclude_path"
printf "%s" "${unmanaged}${exclude_header}${encrypt_data}" > "$exclude_path"
fi
return 0
}
function is_valid_branch_name() {
# Git branches do not allow:
# * path component that begins with "."
# * double dot
# * "~", "^", ":", "\", space
# * end with a "/"
# * end with ".lock"
pattern='(\/\.|\.\.|[~^:\\ ]|\/$|\.lock$)'
[[ "$1" =~ $pattern ]] && return 1
return 0
}
function query_distro() {
distro=""
if command -v "$LSB_RELEASE_PROGRAM" &> /dev/null; then
distro=$($LSB_RELEASE_PROGRAM -si 2>/dev/null)
elif [ -f "$OS_RELEASE" ]; then
while IFS='' read -r line || [ -n "$line" ]; do
if [[ "$line" = ID=* ]]; then
distro="${line#ID=}"
distro="${distro//\"}"
break
fi
done < "$OS_RELEASE"
fi
echo "$distro"
}
function process_global_args() {
# global arguments are removed before the main processing is done
MAIN_ARGS=()
while [[ $# -gt 0 ]] ; do
key="$1"
case $key in
-Y|--yadm-dir) # override the standard YADM_DIR
if [[ ! "$2" =~ ^/ ]] ; then
error_out "You must specify a fully qualified yadm directory"
fi
YADM_DIR="$2"
shift
;;
--yadm-data) # override the standard YADM_DATA
if [[ ! "$2" =~ ^/ ]] ; then
error_out "You must specify a fully qualified yadm data directory"
fi
YADM_DATA="$2"
shift
;;
--yadm-repo) # override the standard YADM_REPO
if [[ ! "$2" =~ ^/ ]] ; then
error_out "You must specify a fully qualified repo path"
fi
YADM_OVERRIDE_REPO="$2"
shift
;;
--yadm-config) # override the standard YADM_CONFIG
if [[ ! "$2" =~ ^/ ]] ; then
error_out "You must specify a fully qualified config path"
fi
YADM_OVERRIDE_CONFIG="$2"
shift
;;
--yadm-encrypt) # override the standard YADM_ENCRYPT
if [[ ! "$2" =~ ^/ ]] ; then
error_out "You must specify a fully qualified encrypt path"
fi
YADM_OVERRIDE_ENCRYPT="$2"
shift
;;
--yadm-archive) # override the standard YADM_ARCHIVE
if [[ ! "$2" =~ ^/ ]] ; then
error_out "You must specify a fully qualified archive path"
fi
YADM_OVERRIDE_ARCHIVE="$2"
shift
;;
--yadm-bootstrap) # override the standard YADM_BOOTSTRAP
if [[ ! "$2" =~ ^/ ]] ; then
error_out "You must specify a fully qualified bootstrap path"
fi
YADM_OVERRIDE_BOOTSTRAP="$2"
shift
;;
*) # main arguments are kept intact
MAIN_ARGS+=("$1")
;;
esac
shift
done
}
function set_yadm_dirs() {
# only resolve YADM_DATA if it hasn't been provided already
if [ -z "$YADM_DATA" ]; then
local base_yadm_data="$XDG_DATA_HOME"
if [[ ! "$base_yadm_data" =~ ^/ ]] ; then
base_yadm_data="${HOME}/.local/share"
fi
YADM_DATA="${base_yadm_data}/yadm"
fi
# only resolve YADM_DIR if it hasn't been provided already
if [ -z "$YADM_DIR" ]; then
local base_yadm_dir="$XDG_CONFIG_HOME"
if [[ ! "$base_yadm_dir" =~ ^/ ]] ; then
base_yadm_dir="${HOME}/.config"
fi
YADM_DIR="${base_yadm_dir}/yadm"
fi
issue_legacy_path_warning
}
function issue_legacy_path_warning() {
# no warnings during upgrade
[[ "${MAIN_ARGS[*]}" =~ upgrade ]] && return
# no warnings if YADM_DIR is resolved as the leacy path
[ "$YADM_DIR" = "$YADM_LEGACY_DIR" ] && return
# no warnings if overrides have been provided
[[ -n "${YADM_OVERRIDE_REPO}${YADM_OVERRIDE_ARCHIVE}" || "$YADM_DATA" = "$YADM_DIR" ]] && return
# test for legacy paths
local legacy_found=()
# this is ordered by importance
for legacy_path in \
"$YADM_DIR/$YADM_REPO" \
"$YADM_DIR/$YADM_LEGACY_ARCHIVE" \
"$YADM_LEGACY_DIR/$YADM_REPO" \
"$YADM_LEGACY_DIR/$YADM_BOOTSTRAP" \
"$YADM_LEGACY_DIR/$YADM_CONFIG" \
"$YADM_LEGACY_DIR/$YADM_ENCRYPT" \
"$YADM_LEGACY_DIR/$YADM_HOOKS"/{pre,post}_* \
"$YADM_LEGACY_DIR/$YADM_LEGACY_ARCHIVE" \
;
do
[ -e "$legacy_path" ] && legacy_found+=("$legacy_path")
done
[ ${#legacy_found[@]} -eq 0 ] && return
local path_list
for legacy_path in "${legacy_found[@]}"; do
path_list="$path_list * $legacy_path"$'\n'
done
cat <<EOF >&2
**WARNING**
Legacy paths have been detected.
With version 3.0.0, yadm uses the XDG Base Directory Specification
to find its configurations and data. Read more about these changes here:
https://yadm.io/docs/upgrade_from_2
https://yadm.io/docs/upgrade_from_1
In your environment, the data directory has been resolved to:
$YADM_DATA
To remove this warning do one of the following:
* Run "yadm upgrade" to move the yadm data to the new paths. (RECOMMENDED)
* Manually move yadm data to new default paths and reinit any submodules.
* Specify your preferred paths with --yadm-data and --yadm-archive each execution.
Legacy paths detected:
${path_list}
***********
EOF
LEGACY_WARNING_ISSUED=1
}
function configure_paths() {
# change paths to be relative to YADM_DIR
YADM_CONFIG="$YADM_DIR/$YADM_CONFIG"
YADM_ENCRYPT="$YADM_DIR/$YADM_ENCRYPT"
YADM_BOOTSTRAP="$YADM_DIR/$YADM_BOOTSTRAP"
YADM_HOOKS="$YADM_DIR/$YADM_HOOKS"
YADM_ALT="$YADM_DIR/$YADM_ALT"
# change paths to be relative to YADM_DATA
YADM_REPO="$YADM_DATA/$YADM_REPO"
YADM_ARCHIVE="$YADM_DATA/$YADM_ARCHIVE"
# independent overrides for paths
if [ -n "$YADM_OVERRIDE_REPO" ]; then
YADM_REPO="$YADM_OVERRIDE_REPO"
fi
if [ -n "$YADM_OVERRIDE_CONFIG" ]; then
YADM_CONFIG="$YADM_OVERRIDE_CONFIG"
fi
if [ -n "$YADM_OVERRIDE_ENCRYPT" ]; then
YADM_ENCRYPT="$YADM_OVERRIDE_ENCRYPT"
fi
if [ -n "$YADM_OVERRIDE_ARCHIVE" ]; then
YADM_ARCHIVE="$YADM_OVERRIDE_ARCHIVE"
fi
if [ -n "$YADM_OVERRIDE_BOOTSTRAP" ]; then
YADM_BOOTSTRAP="$YADM_OVERRIDE_BOOTSTRAP"
fi
# use the yadm repo for all git operations
GIT_DIR=$(mixed_path "$YADM_REPO")
export GIT_DIR
# obtain YADM_WORK from repo if it exists
if [ -d "$GIT_DIR" ]; then
local work
work=$(unix_path "$("$GIT_PROGRAM" config core.worktree)")
[ -n "$work" ] && YADM_WORK="$work"
fi
# YADM_BASE is used for manipulating the base worktree path for much of the
# alternate file processing
if [ "$YADM_WORK" == "/" ]; then
YADM_BASE=""
else
YADM_BASE="$YADM_WORK"
fi
}
function configure_repo() {
debug "Configuring new repo"
# change bare to false (there is a working directory)
"$GIT_PROGRAM" config core.bare 'false'
# set the worktree for the yadm repo
"$GIT_PROGRAM" config core.worktree "$(mixed_path "$YADM_WORK")"
# by default, do not show untracked files and directories
"$GIT_PROGRAM" config status.showUntrackedFiles no
# possibly used later to ensure we're working on the yadm repo
"$GIT_PROGRAM" config yadm.managed 'true'
}
function set_operating_system() {
local proc_version
proc_version=$(cat "$PROC_VERSION" 2>/dev/null)
if [[ "$proc_version" =~ [Mm]icrosoft ]]; then
OPERATING_SYSTEM="WSL"
else
OPERATING_SYSTEM=$(uname -s)
fi
case "$OPERATING_SYSTEM" in
CYGWIN*|MINGW*|MSYS*)
git_version="$("$GIT_PROGRAM" --version 2>/dev/null)"
if [[ "$git_version" =~ windows ]] ; then
USE_CYGPATH=1
fi
OPERATING_SYSTEM=$(uname -o)
;;
*)
;;
esac
}
function set_awk() {
local pgm
for pgm in "${AWK_PROGRAM[@]}"; do
command -v "$pgm" &> /dev/null && AWK_PROGRAM=("$pgm") && return
done
}
function debug() {
[ -n "$DEBUG" ] && echo_e "DEBUG: $*"
}
function error_out() {
echo_e "ERROR: $*" >&2
exit_with_hook 1
}
function exit_with_hook() {
invoke_hook "post" "$1"
exit "$1"
}
function invoke_hook() {
mode="$1"
exit_status="$2"
hook_command="${YADM_HOOKS}/${mode}_$HOOK_COMMAND"
if [ -x "$hook_command" ] || \
{ [[ $OPERATING_SYSTEM == MINGW* ]] && [ -f "$hook_command" ] ;} ; then
debug "Invoking hook: $hook_command"
# expose some internal data to all hooks
YADM_HOOK_COMMAND=$HOOK_COMMAND
YADM_HOOK_DIR=$YADM_DIR
YADM_HOOK_DATA=$YADM_DATA
YADM_HOOK_EXIT=$exit_status
YADM_HOOK_FULL_COMMAND=$FULL_COMMAND
YADM_HOOK_REPO=$YADM_REPO
YADM_HOOK_WORK=$YADM_WORK
# pack array to export it; filenames including a newline character (\n)
# are NOT supported
YADM_ENCRYPT_INCLUDE_FILES=$(join_string $'\n' "${ENCRYPT_INCLUDE_FILES[@]}")
export YADM_HOOK_COMMAND
export YADM_HOOK_DIR
export YADM_HOOK_DATA
export YADM_HOOK_EXIT
export YADM_HOOK_FULL_COMMAND
export YADM_HOOK_REPO
export YADM_HOOK_WORK
export YADM_ENCRYPT_INCLUDE_FILES
# export helper functions
export -f builtin_dirname
export -f relative_path
export -f unix_path
export -f mixed_path
"$hook_command"
hook_status=$?
# failing "pre" hooks will prevent commands from being run
if [ "$mode" = "pre" ] && [ "$hook_status" -ne 0 ]; then
echo "Hook $hook_command was not successful"
echo "$HOOK_COMMAND will not be run"
exit "$hook_status"
fi
fi
}
function private_dirs() {
fetch="$1"
pdirs=(.ssh)
if [ -z "${GNUPGHOME:-}" ]; then
pdirs+=(.gnupg)
else
pdirs+=("$(relative_path "$YADM_WORK" "$GNUPGHOME")")
fi
if [ "$fetch" = "all" ]; then
echo "${pdirs[@]}"
else
echo "${pdirs[1]}"
fi
}
function assert_private_dirs() {
for private_dir in "$@"; do
if [ ! -d "$YADM_WORK/$private_dir" ]; then
debug "Creating $YADM_WORK/$private_dir"
#shellcheck disable=SC2174
mkdir -m 0700 -p "$YADM_WORK/$private_dir" &> /dev/null
fi
done
}
function assert_parent() {
basedir=${1%/*}
if [ -n "$basedir" ]; then
[ -e "$basedir" ] || mkdir -p "$basedir"
fi
}
function display_private_perms() {
when="$1"
for private_dir in $(private_dirs all); do
if [ -d "$YADM_WORK/$private_dir" ]; then
private_perms=$(ls -ld "$YADM_WORK/$private_dir")
debug "$when" private dir perms "$private_perms"
fi
done
}
function cd_work() {
cd "$YADM_WORK" || {
debug "$1 not processed, unable to cd to $YADM_WORK"
return 1
}
return 0
}
function parse_encrypt() {
if [ "$ENCRYPT_INCLUDE_FILES" != "unparsed" ]; then
#shellcheck disable=SC2034
PARSE_ENCRYPT_SHORT="parse_encrypt() not reprocessed"
return
fi
ENCRYPT_INCLUDE_FILES=()
ENCRYPT_EXCLUDE_FILES=()
cd_work "Parsing encrypt" || return
# setting globstar to allow ** in encrypt patterns
# (only supported on Bash >= 4)
local unset_globstar
if ! shopt globstar &> /dev/null; then
unset_globstar=1
fi
shopt -s globstar &> /dev/null
exclude_pattern="^!(.+)"
if [ -f "$YADM_ENCRYPT" ] ; then
# parse both included/excluded
while IFS='' read -r line || [ -n "$line" ]; do
if [[ ! $line =~ ^# && ! $line =~ ^[[:blank:]]*$ ]] ; then
local IFS=$'\n'
for pattern in $line; do
if [[ "$pattern" =~ $exclude_pattern ]]; then
for ex_file in ${BASH_REMATCH[1]}; do
if [ -e "$ex_file" ]; then
ENCRYPT_EXCLUDE_FILES+=("$ex_file")
fi
done
else
for in_file in $pattern; do
if [ -e "$in_file" ]; then
ENCRYPT_INCLUDE_FILES+=("$in_file")
fi
done
fi
done
fi
done < "$YADM_ENCRYPT"
# remove excludes from the includes
#(SC2068 is disabled because in this case, we desire globbing)
FINAL_INCLUDE=()
#shellcheck disable=SC2068
for included in "${ENCRYPT_INCLUDE_FILES[@]}"; do
skip=
#shellcheck disable=SC2068
for ex_file in ${ENCRYPT_EXCLUDE_FILES[@]}; do
[ "$included" == "$ex_file" ] && { skip=1; break; }
done
[ -n "$skip" ] || FINAL_INCLUDE+=("$included")
done
# sort the encrypted files
#shellcheck disable=SC2207
IFS=$'\n' ENCRYPT_INCLUDE_FILES=($(LC_ALL=C sort <<<"${FINAL_INCLUDE[*]}"))
unset IFS
fi
if [ "$unset_globstar" = "1" ]; then
shopt -u globstar &> /dev/null
fi
}
function builtin_dirname() {
# dirname is not builtin, and universally available, this is a built-in
# replacement using parameter expansion
path="$1"
dname="${path%/*}"
if ! [[ "$path" =~ / ]]; then
echo "."
elif [ "$dname" = "" ]; then
echo "/"
else
echo "$dname"
fi
}
function relative_path() {
# Output a path to $2/full, relative to $1/base
#
# This fucntion created with ideas from
# https://stackoverflow.com/questions/2564634
base="$1"
full="$2"
common_part="$base"
result=""
count=0
while [ "${full#$common_part}" == "${full}" ]; do
[ "$count" = "500" ] && return # this is a failsafe
# no match, means that candidate common part is not correct
# go up one level (reduce common part)
common_part="$(builtin_dirname "$common_part")"
# and record that we went back, with correct / handling
if [[ -z $result ]]; then
result=".."
else
result="../$result"
fi
count=$((count+1))
done
if [[ $common_part == "/" ]]; then
# special case for root (no common path)
result="$result/"
fi
# since we now have identified the common part,
# compute the non-common part
forward_part="${full#$common_part}"
# and now stick all parts together
if [[ -n $result ]] && [[ -n $forward_part ]]; then
result="$result$forward_part"
elif [[ -n $forward_part ]]; then
# extra slash removal
result="${forward_part:1}"
fi
echo "$result"
}
# ****** Auto Functions ******
function auto_alt() {
# process alternates if there are possible changes
if [ "$CHANGES_POSSIBLE" = "1" ] ; then
auto_alt=$(config --bool yadm.auto-alt)
if [ "$auto_alt" != "false" ] ; then
[ -d "$YADM_REPO" ] && alt
fi
fi
}
function auto_perms() {
# process permissions if there are possible changes
if [ "$CHANGES_POSSIBLE" = "1" ] ; then
auto_perms=$(config --bool yadm.auto-perms)
if [ "$auto_perms" != "false" ] ; then
[ -d "$YADM_REPO" ] && perms
fi
fi
}
function auto_bootstrap() {
bootstrap_available || return
[ "$DO_BOOTSTRAP" -eq 0 ] && return
[ "$DO_BOOTSTRAP" -eq 3 ] && return
[ "$DO_BOOTSTRAP" -eq 2 ] && bootstrap
if [ "$DO_BOOTSTRAP" -eq 1 ] ; then
echo "Found $YADM_BOOTSTRAP"
echo "It appears that a bootstrap program exists."
echo "Would you like to execute it now? (y/n)"
read -r answer < /dev/tty
if [[ $answer =~ ^[yY]$ ]] ; then
bootstrap
fi
fi
}
# ****** Helper Functions ******
function join_string {
local IFS="$1"
printf "%s" "${*:2}"
}
function get_mode {
local filename="$1"
local mode
# most *nixes
mode=$(stat -c '%a' "$filename" 2>/dev/null)
if [ -z "$mode" ] ; then
# BSD-style
mode=$(stat -f '%p' "$filename" 2>/dev/null)
mode=${mode: -4}
fi
# only accept results if they are octal
if [[ ! $mode =~ ^[0-7]+$ ]] ; then
mode=""
fi
echo "$mode"
}
function copy_perms {
local source="$1"
local dest="$2"
mode=$(get_mode "$source")
[ -n "$mode" ] && chmod "$mode" "$dest"
return 0
}
# ****** Prerequisites Functions ******
function require_archive() {
[ -f "$YADM_ARCHIVE" ] || error_out "$YADM_ARCHIVE does not exist. did you forget to create it?"
}
function require_encrypt() {
[ -f "$YADM_ENCRYPT" ] || error_out "$YADM_ENCRYPT does not exist. did you forget to create it?"
}
function require_git() {
local alt_git
alt_git="$(config yadm.git-program)"
local more_info=""
if [ "$alt_git" != "" ] ; then
GIT_PROGRAM="$alt_git"
more_info="\nThis command has been set via the yadm.git-program configuration."
fi
command -v "$GIT_PROGRAM" &> /dev/null ||
error_out "This functionality requires Git to be installed, but the command '$GIT_PROGRAM' cannot be located.$more_info"
}
function require_gpg() {
local alt_gpg
alt_gpg="$(config yadm.gpg-program)"
local more_info=""
if [ "$alt_gpg" != "" ] ; then
GPG_PROGRAM="$alt_gpg"
more_info="\nThis command has been set via the yadm.gpg-program configuration."
fi
command -v "$GPG_PROGRAM" &> /dev/null ||
error_out "This functionality requires GPG to be installed, but the command '$GPG_PROGRAM' cannot be located.$more_info"
}
function require_openssl() {
local alt_openssl
alt_openssl="$(config yadm.openssl-program)"
local more_info=""
if [ "$alt_openssl" != "" ] ; then
OPENSSL_PROGRAM="$alt_openssl"
more_info="\nThis command has been set via the yadm.openssl-program configuration."
fi
command -v "$OPENSSL_PROGRAM" &> /dev/null ||
error_out "This functionality requires OpenSSL to be installed, but the command '$OPENSSL_PROGRAM' cannot be located.$more_info"
}
function require_repo() {
[ -d "$YADM_REPO" ] || error_out "Git repo does not exist. did you forget to run 'init' or 'clone'?"
}
function require_shell() {
[ -x "$SHELL" ] || error_out "\$SHELL does not refer to an executable."
}
function require_git_crypt() {
command -v "$GIT_CRYPT_PROGRAM" &> /dev/null ||
error_out "This functionality requires git-crypt to be installed, but the command '$GIT_CRYPT_PROGRAM' cannot be located."
}
function require_transcrypt() {
command -v "$TRANSCRYPT_PROGRAM" &> /dev/null ||
error_out "This functionality requires transcrypt to be installed, but the command '$TRANSCRYPT_PROGRAM' cannot be located."
}
function bootstrap_available() {
[ -f "$YADM_BOOTSTRAP" ] && [ -x "$YADM_BOOTSTRAP" ] && return
return 1
}
function awk_available() {
command -v "${AWK_PROGRAM[0]}" &> /dev/null && return
return 1
}
function j2cli_available() {
command -v "$J2CLI_PROGRAM" &> /dev/null && return
return 1
}
function envtpl_available() {
command -v "$ENVTPL_PROGRAM" &> /dev/null && return
return 1
}
function esh_available() {
command -v "$ESH_PROGRAM" &> /dev/null && return
return 1
}
function readlink_available() {
command -v "readlink" &> /dev/null && return
return 1
}
# ****** Directory translations ******
function unix_path() {
# for paths used by bash/yadm
if [ "$USE_CYGPATH" = "1" ] ; then
cygpath -u "$1"
else
echo "$1"
fi
}
function mixed_path() {
# for paths used by Git
if [ "$USE_CYGPATH" = "1" ] ; then
cygpath -m "$1"
else
echo "$1"
fi
}
# ****** echo replacements ******
function echo() {
IFS=' '
printf '%s\n' "$*"
}
function echo_n() {
IFS=' '
printf '%s' "$*"
}
function echo_e() {
IFS=' '
printf '%b\n' "$*"
}
# ****** Main processing (when not unit testing) ******
if [ "$YADM_TEST" != 1 ] ; then
process_global_args "$@"
set_operating_system
set_awk
set_yadm_dirs
configure_paths
main "${MAIN_ARGS[@]}"
fi
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