Initial commit.

syncthing-resolve-conflicts.sh

@@ -0,0 +1,223 @@
+#!/usr/bin/bash
+
+# Check for sync conflicts and resolve them.  Idea from the shell
+# script 'pacdiff'.
+
+declare -r myname='syncthing-resolve-conflicts.sh'
+declare -r myver='1.0.0'
+
+diffprog=${DIFFPROG:-'vim -d'}
+USE_COLOR='y'
+declare -a ignored
+declare -a nontext
+
+plain() {
+	(( QUIET )) && return
+	local mesg=$1; shift
+	printf "    ${mesg}${ALL_OFF}\n" "$@" >&1
+}
+
+msg() {
+	(( QUIET )) && return
+	local mesg=$1; shift
+	printf "${GREEN}==>${ALL_OFF} ${mesg}${ALL_OFF}\n" "$@" >&1
+}
+
+msg2() {
+	(( QUIET )) && return
+	local mesg=$1; shift
+	printf "${BLUE} ->${ALL_OFF} ${mesg}${ALL_OFF}\n" "$@" >&1
+}
+
+ask() {
+	local mesg=$1; shift
+	printf " ${BLUE}::${ALL_OFF} ${mesg}${ALL_OFF}" "$@" >&1
+}
+
+warning() {
+	local mesg=$1; shift
+    echo
+	printf "${YELLOW}==> $(gettext "WARNING:")${ALL_OFF} ${mesg}${ALL_OFF}\n" "$@" >&2
+}
+
+error() {
+	local mesg=$1; shift
+	printf "${RED}==> $(gettext "ERROR:")${ALL_OFF} ${mesg}${ALL_OFF}\n" "$@" >&2
+}
+
+usage() {
+	cat <<EOF
+${myname} v${myver}
+
+Inspired by 'pacdiff'.
+A simple program to merge or remove sync conflicts.
+Locate is used to find conflicts.
+In case the database is not recent, run 'updatedb'.
+
+Usage: $myname [-o] [--nocolor]
+
+General Options:
+  -o/--output       print files instead of merging them
+  --nocolor         remove colors from output
+
+Environment Variables:
+  DIFFPROG          override the merge program: (default: 'vim -d')
+
+Example: DIFFPROG=meld $myname
+Example: $myname --output
+
+EOF
+}
+
+version() {
+	printf "%s %s\n" "$myname" "$myver"
+    echo 'Copyright (C) 2017 Dominik Schrempf <dominik.schrempf@gmail.com>'
+	echo 'Inspired by "pacdiff".'
+}
+
+cmd() {
+	locate -0 -e -b sync-conflict
+}
+
+while [[ -n "$1" ]]; do
+	case "$1" in
+		-o|--output)
+			OUTPUTONLY=1;;
+		--nocolor)
+			USE_COLOR='n';;
+		-v|-V|--version)
+			version; exit 0;;
+		-h|--help)
+			usage; exit 0;;
+		*)
+			usage; exit 1;;
+	esac
+	shift
+done
+
+# Check if messages are to be printed using color.
+unset ALL_OFF BOLD BLUE GREEN RED YELLOW
+if [[ -t 2 && $USE_COLOR = "y" ]]; then
+	# Prefer terminal safe colored and bold text when tput is supported.
+	if tput setaf 0 &>/dev/null; then
+		ALL_OFF="$(tput sgr0)"
+		BLUE="$(tput setaf 27)"
+		GREEN="$(tput setaf 2)"
+		RED="$(tput setaf 1)"
+		YELLOW="$(tput setaf 3)"
+	else
+		ALL_OFF="\e[1;0m"
+		BLUE="\e[1;34m"
+		GREEN="\e[1;32m"
+		RED="\e[1;31m"
+		YELLOW="\e[1;33m"
+	fi
+fi
+readonly ALL_OFF BOLD BLUE GREEN RED YELLOW
+
+if ! type -p ${diffprog%% *} >/dev/null && (( ! OUTPUTONLY )); then
+	error "Cannot find the $diffprog binary required for viewing differences."
+	exit 1
+fi
+
+warning "Recursive sync conflicts are not properly handled."
+
+# See http://mywiki.wooledge.org/BashFAQ/020.
+while IFS= read -u 3 -r -d '' conflict; do
+	if (( OUTPUTONLY )); then
+		echo "$conflict"
+		continue
+	fi
+
+    # Ignore backups in '.stversions' folders.
+    if [[ "$conflict" = */.stversions/* ]]
+    then
+		ignored+=("$conflict")
+		continue
+    fi
+
+    # XXX: Maybe somebody wants to diff special non-text files?
+    
+    # Ignore binary files.
+    if [[ -z $(file -i "$conflict" | grep text) ]]
+    then
+		nontext+=("$conflict")
+		continue
+    fi
+    
+    # XXX: Recursive sync conflicts lead to problems if they are
+    # treated in the wrong order.
+
+    # TODO: Improve pattern match (digits only).
+
+    # Original filename.
+    file="${conflict/.sync-conflict-????????-??????/}"
+
+	msg "Sync conflict found: %s" "$conflict"
+    # Handle sync conflict if original file exists.
+    if [ ! -f "$file" ]
+    then
+        warning "Original file does not exist for conflict %s." "$conflict"
+        ignored+=("$conflict")
+        continue
+    fi
+    msg2 "Original file: %s" "$file"
+
+	if cmp -s "$conflict" "$file"; then
+		msg2 "Files are identical, removing..."
+		plain "$(rm -v "$conflict")"
+	else
+		ask "(V)iew, (S)kip, (R)emove sync conflict, (O)verwrite with sync conflict, (Q)uit: [v/s/r/o/q] "
+		while read c; do
+			case $c in
+				q|Q) exit 0;;
+				r|R) plain "$(rm -v "$conflict")"; break ;;
+				o|O) plain "$(mv -v "$conflict" "$file")"; break ;;
+				v|V)
+					$diffprog "$conflict" "$file"
+		            ask "(V)iew, (S)kip, (R)emove sync conflict, (O)verwrite with sync conflict, (Q)uit: [v/s/r/o/q] "
+					continue ;;
+				s|S) break ;;
+				*) ask "Invalid answer. Try again: [v/s/r/o/q] "; continue ;;
+			esac
+		done
+	fi
+done 3< <(cmd)
+
+# Print warning if files have been ignored and delete them if
+# specified.
+if [ ! ${#ignored[@]} -eq 0 ]
+then
+    warning "Some files have been ignored."
+    (( ${#ignored[@]} )) && msg "%s" "${ignored[@]}"
+    ask "(R)emove ignored files, (Q)uit: [r/q] "
+    while read c; do
+        case $c in
+            q|Q) exit 0 ;;
+            r|R) (( ${#ignored[@]} )) && plain "$(rm -v "${ignored[@]}")"; break ;;
+            *) ask "Invalid answer.  Try again: [d/q] "; continue ;;
+        esac
+    done
+fi
+
+# Print warning if non-text sync conflicts have been detected and
+# delete them one by one if specified.
+if [ ! ${#nontext[@]} -eq 0 ]
+then
+    warning "Some files that are not text have been ignored."
+    for f in "${nontext[@]}"
+    do
+        msg "%s" "$f"
+        ask "(R)emove, (S)kip, (Q)uit: [r/s/q] "
+        while read c; do
+            case $c in
+                q|Q) exit 0 ;;
+                s|S) break ;;
+                r|R) plain "$(rm -v "$f")"; break ;;
+                *) ask "Invalid answer.  Try again: [r/s/q] "; continue ;;
+            esac
+        done
+    done
+fi
+
+exit 0