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mailserver: fix notmuch-flag-sync Seen flag detection
The grep patterns (',.*S' and '-v ,.*S') matched Dovecot's size
metadata (,S=7520) instead of the actual Maildir Seen flag after :2,.
This prevented read status from propagating from notmuch to IMAP.
Replace grep-based filtering with case statements that check the
flags field after :2, correctly.
author
lassulus
date
(Apr 4, 2026, 8:19 PM CEST)
commit
78ba93da
78ba93da416e44304dee4f9bd4735cbffa9da24d
parent
48bc6cdf
48bc6cdf220d4d309f0e6b128cb94ca20ab91950
+7
-5
+7
-5
2configs/mailserver.nix
+7
-5
2configs/mailserver.nix
···
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export NOTMUCH_CONFIG="${
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self.packages.${pkgs.system}.notmuch.passthru.configuration.configFile.path
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}"
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# First, pick up any IMAP flag changes into notmuch
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${pkgs.notmuch}/bin/notmuch new --quiet 2>/dev/null || true
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# Add S flag to files notmuch considers read but that lack it
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${pkgs.notmuch}/bin/notmuch search --output=files 'NOT tag:unread' \
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-
| ${pkgs.gnugrep}/bin/grep -v ',.*S' \
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| ${pkgs.gnugrep}/bin/grep '/cur/' \
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| while IFS= read -r f; do
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[ -f "$f" ] || continue
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-
base="''${f%:2,*}"
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flags="''${f##*:2,}"
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case "$flags" in *S*) continue ;; esac
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base="''${f%:2,*}"
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mv "$f" "''${base}:2,''${flags}S"
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done
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# Remove S flag from files notmuch considers unread but that have it
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${pkgs.notmuch}/bin/notmuch search --output=files 'tag:unread' \
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| ${pkgs.gnugrep}/bin/grep ',.*S' \
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| ${pkgs.gnugrep}/bin/grep '/cur/' \
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| while IFS= read -r f; do
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[ -f "$f" ] || continue
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base="''${f%:2,*}"
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flags="''${f##*:2,}"
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newflags="$(echo "$flags" | ${pkgs.gnused}/bin/sed 's/S//g')"
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case "$flags" in *S*) ;; *) continue ;; esac
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base="''${f%:2,*}"
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newflags="''${flags//S/}"
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mv "$f" "''${base}:2,''${newflags}"
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done
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# Update notmuch DB with the renames