Initial commit

roles/gekmihesg.openwrt/library/openwrt_lineinfile.sh

@@ -0,0 +1,122 @@
+#!/bin/sh
+# Copyright (c) 2017 Markus Weippert
+# GNU General Public License v3.0 (see https://www.gnu.org/licenses/gpl-3.0.txt)
+
+PARAMS="
+    backrefs/bool//false
+    create/bool//false
+    insertafter/str
+    insertbefore/str
+    line=value/str
+    path=dest=destfile=name/str/r
+    regex=regexp/str
+    state/str//present
+    $FILE_PARAMS
+"
+RESPONSE_VARS=""
+
+escape_slash() {
+    echo "$1" | sed -e 's|^/|\\/|;:a;s|\([^\]\(\\\\\)*\)/|\1\\/|g;ta;q'
+}
+
+escape_chars() {
+    echo "$1" | sed 's|['"${2:-}"'\]|\\&|g;q'
+}
+
+get_last_match() {
+    echo "$2" | sed -nre "/$1/=" | sed '$!d'
+}
+
+save_changes() {
+    [ -n "$_ansible_check_mode" -o -z "$CHANGED" ] ||
+        echo "$1" > "$path" 2>/dev/null ||
+        fail "path $path not writeable"
+}
+
+line_present() {
+    local index old new mode tmp
+
+    [ -f "$path" ] && {
+        old="$(cat "$path")" || fail "path $path not readable"
+    } || {
+        [ -n "$create" ] || fail "path $path does not exist"
+        [ -n "$_ansible_check_mode" ] ||
+            mkdir -p "$(dirname "$path")"
+        old=""
+    }
+
+    index="$(get_last_match "$line_match" "$old")"
+    [ -n "$index" ] && {
+        tmp="$(echo "$old" | sed -n "${index}{p;q}")"
+        [ -z "$backrefs" ] || line="$(echo "$tmp" |
+            sed -re "s/$line_match/$(escape_slash "$line")/")"
+        [ "$tmp" = "$line" ] || {
+            new="$(echo "$old" | sed "${index}c $(escape_chars "$line" |
+                    sed 's|^\s|\\&|;q')")"
+            changed
+        }
+    } || [ -n "$backrefs" ] || {
+        [ -n "${insertafter#[EB]OF}" ] && {
+            index="$(get_last_match "$(escape_slash "$insertafter")" "$old")"
+            mode="a"
+        } || [ -z "${insertbefore#BOF}" ] || {
+            index="$(get_last_match "$(escape_slash "$insertbefore")" "$old")"
+            mode="i"
+        }
+        [ -n "$index" ] && {
+            new="$(echo "$old" | sed "$index$mode $(escape_chars "$line" |
+                    sed 's|^\s|\\&|;q')")"
+        } || {
+            [ "$insertafter" = "BOF" -o "$insertbefore" = "BOF" ] &&
+                new="$line$N$old" || {
+                    tmp="$(echo "$old" | sed '${/^$/d}')"
+                    new="$tmp${tmp:+$N}$line"
+                }
+        }
+        changed
+    }
+
+    [ -z "$CHANGED" ] || {
+        [ -z "$_ansible_diff" ] || set_diff "$old" "$new" "$path" "$path"
+        [ -n "$_ansible_check_mode" ] || save_changes "$new"
+    }
+}
+
+line_absent() {
+    local index new old
+
+    [ -f "$path" ] || return 0
+
+    old="$(cat "$path")" || fail "path $path not readable"
+    index="$(get_last_match "$line_match" "$old")"
+    [ -z "$index" ] || {
+        new="$(echo "$old" | sed -re "/$line_match/d")"
+        changed
+    }
+
+    [ -z "$_ansible_diff" ] || set_diff "$old" "$new" "$path" "$path"
+    [ -n "$_ansible_check_mode" -o -z "$CHANGED" ] || save_changes "$new"
+}
+
+main() {
+    case "$state" in
+        absent|present) :;;
+        *) fail "state must be absent or present";;
+    esac
+    [ -n "$regex" ] &&
+        line_match="$(escape_slash "$regex")" ||
+        line_match="^$(escape_chars "$line" '/.[*^$()+?{|')\$"
+    [ ! -d "$file" ] || fail "path $path is a directory"
+    case "$state" in
+        present)
+            [ -z "$backrefs" -o -n "$regex" ] ||
+                fail "regexp is required with backrefs"
+            [ -n "$line" ] || fail "line is required with state present"
+            line_present;;
+        absent)
+            [ -n "$line" -o -n "$regex" ] ||
+                fail "line or regexp is required with state absent"
+            line_absent;;
+    esac
+    set_file_attributes "$path" "" "y"
+}