2 files changed, 92 insertions, 0 deletions
diff --git a/carddav-to-alpine b/carddav-to-alpine
new file mode 100755
index 0000000..1f852b9
--- /dev/null
+++ b/carddav-to-alpine
@@ -0,0 +1,77 @@
+#!/bin/bash
+
+. "${0%/*}/common"
+
+error=0
+
+keys=(
+  'UID'
+  'EMAIL'
+  'FN'
+  'NICKNAME'
+  'FCC'
+  'COMMENT'
+  'REV'
+)
+
+touch "${git_dir}"'/uids'
+
+find "${git_dir}" \
+  -name '.git' \
+  -prune \
+  , \
+  -type f \
+  -name '*.vcs' \
+  -printf '%p\n' \
+| while read -r f; do
+  uid="${f##*/}"
+  uid="${uid%.vcs}"
+
+  for key in "${keys[@]}"; do
+    eval 'unset _'"${key}"
+  done
+
+  while read -r key value; do
+    eval '_'"${key}"'="${value}"'
+  done < <(
+    sed -n '
+      s@\t@ @g
+      s@\r$@@
+      /^BEGIN:VCARD$/,/END:VCARD$/ {
+        /^\('"$(printf '%s\\|' "${keys[@]}" | sed 's@\\|$@@')"'\):/ {
+          s@:@ @
+          p
+        }
+      }
+    ' "$f"
+  )
+
+  if [ "${_UID}" != "${uid}" ]; then
+    >&2 printf 'uids differ: "%s" != "%s"\n' "${uid}" "${_UID}"
+    error=1
+    continue
+  fi
+
+  sed -i '
+    /^'"${uid}"' /d
+  ' "${git_dir}"'/uids'
+
+  printf '%s\t' \
+    "${_UID}" \
+    "${_NICKNAME}" \
+    "${_FN}" \
+    "${_EMAIL}" \
+    "${_FCC}" \
+    "${_COMMENT}" \
+  | sed '
+    s@\t@ @
+    s@\t$@\n@
+  ' >>"${git_dir}"'/uids'
+done
+
+sed '
+  s@^\S\+ @@
+' "${git_dir}"'/uids' \
+>"${git_dir}"'/addressbook'
+
+exit ${error}
diff --git a/common b/common
new file mode 100644
index 0000000..3204673
--- /dev/null
+++ b/common
@@ -0,0 +1,15 @@
+#!/hint/bash
+
+gen_rev() {
+  printf 'REV:%s\n' "$(
+    date -u -Iseconds \
+    | sed 's@+00:00$@Z@'
+  )"
+}
+
+git_dir="$1"
+
+if [ ! -d "${git_dir}" ]; then
+  >&2 printf 'invalid git dir: "%s"\n' "${git_dir}"
+  exit 1
+fi