Introduce installSecretFn script function to make script shorter.

ryantm · Dec 11, 2023 · 6f4f6b2 · 6f4f6b2
1 parent 8ed94ff
commit 6f4f6b2
Showing 1 changed file with 42 additions and 26 deletions.
diff --git a/modules/age.nix b/modules/age.nix
@@ -61,34 +61,45 @@ with lib; let
     }
   '';
 
-  installSecret = secretType: ''
-    ${setTruePath secretType}
-    echo "decrypting '${secretType.file}' to '$_truePath'..."
-    TMP_FILE="$_truePath.tmp"
+  # This function is called with the following mapping:
+  # secretType.symlink = $1
+  # secretType.name = $2
+  # secretType.path = $3
+  # secretType.file = $4
+  # secretType.mode = $5
+  installSecretFn = ''
+    installSecret() {
+      if "$1"; then
+        _truePath="${cfg.secretsMountPoint}/$_agenix_generation/$2"
+      else
+        _truePath="$3"
+      fi
+      echo "decrypting $4 to '$_truePath'..."
+      TMP_FILE="$_truePath.tmp"
 
-    IDENTITIES=()
-    for identity in ${toString cfg.identityPaths}; do
-      test -r "$identity" || continue
-      IDENTITIES+=(-i)
-      IDENTITIES+=("$identity")
-    done
+      IDENTITIES=()
+      for identity in ${toString cfg.identityPaths}; do
+        test -r "$identity" || continue
+        IDENTITIES+=(-i)
+        IDENTITIES+=("$identity")
+      done
 
-    test "''${#IDENTITIES[@]}" -eq 0 && echo "[agenix] WARNING: no readable identities found!"
+      test "''${#IDENTITIES[@]}" -eq 0 && echo "[agenix] WARNING: no readable identities found!"
 
-    mkdir -p "$(dirname "$_truePath")"
-    [ "${secretType.path}" != "${cfg.secretsDir}/${secretType.name}" ] && mkdir -p "$(dirname "${secretType.path}")"
-    (
-      umask u=r,g=,o=
-      test -f "${secretType.file}" || echo '[agenix] WARNING: encrypted file ${secretType.file} does not exist!'
-      test -d "$(dirname "$TMP_FILE")" || echo "[agenix] WARNING: $(dirname "$TMP_FILE") does not exist!"
-      LANG=${config.i18n.defaultLocale or "C"} ${ageBin} --decrypt "''${IDENTITIES[@]}" -o "$TMP_FILE" "${secretType.file}"
-    )
-    chmod ${secretType.mode} "$TMP_FILE"
-    mv -f "$TMP_FILE" "$_truePath"
+      mkdir -p "$(dirname "$_truePath")"
+      [ "$3" != "${cfg.secretsDir}/$2" ] && mkdir -p "$(dirname "$3")"
+      (
+        umask u=r,g=,o=
+        test -f "$4" || echo '[agenix] WARNING: encrypted file '$4' does not exist!'
+        test -d "$(dirname "$TMP_FILE")" || echo "[agenix] WARNING: $(dirname "$TMP_FILE") does not exist!"
+        LANG=${config.i18n.defaultLocale or "C"} ${ageBin} --decrypt "''${IDENTITIES[@]}" -o "$TMP_FILE" "$4"
+      )
+      chmod "$5" "$TMP_FILE"
+      mv -f "$TMP_FILE" "$_truePath"
 
-    ${optionalString secretType.symlink ''
-      [ "${secretType.path}" != "${cfg.secretsDir}/${secretType.name}" ] && ln -sfn "${cfg.secretsDir}/${secretType.name}" "${secretType.path}"
-    ''}
+      "$1" && ([ "$3" != "${cfg.secretsDir}/$2" ] && ln -sfn "${cfg.secretsDir}/$2" "$3")
+      true
+    }
   '';
 
   testIdentities =
@@ -110,10 +121,15 @@ with lib; let
     }
   '';
 
-  installSecrets = builtins.concatStringsSep "\n" (
+  installSecrets = let
+    mkLine = secretType: ''
+      installSecret "${if secretType.symlink then "true" else "false"}" "${secretType.name}" "${secretType.path}" "${secretType.file}" "${secretType.mode}";
+   '';
+  in builtins.concatStringsSep "\n" (
     ["echo '[agenix] decrypting secrets...'"]
     ++ testIdentities
-    ++ (map installSecret (builtins.attrValues cfg.secrets))
+    ++ [installSecretFn]
+    ++ (map mkLine (builtins.attrValues cfg.secrets))
     ++ [cleanupAndLink]
   );