add content filter option

2 files changed, 14 insertions, 4 deletions

diff --git a/README.md b/README.md
index 8fb184b..34a1675 100644
--- a/README.md
+++ b/README.md
@@ -100,3 +100,13 @@ Have also a look at the generated `atom.xml` files. They make sense (at least) f
 If you use git, you can use `./gemtexter --publish`, which does a `--generate` followed by a `--git-add` and a `--git-sync`.
 
 It is up to you to set up a Gemini server for the Gemtext, a Webserver for the HTML or a GitHub page for the Markdown format (or both).
+
+## Content filter
+
+Once your capsule reaches a certain size it can become anoying to re-generate everything if you only want to modify one single Gemtext file. The following will add a filter to only generate the files matching a regular expression:
+
+```
+./gemtexter --generate '.*hello.*'
+```
+
+This will help you to quickly review the results once in a while. Once you are happy you should always re-generate the whole capsule before publishing it!
diff --git a/gemtexter b/gemtexter
index e91f149..a2b3e11 100755
--- a/gemtexter
+++ b/gemtexter
@@ -4,6 +4,8 @@
 # by Paul Buetow 2021, 2022
 
 declare -r ARG="$1"; shift
+declare -r CONTENT_FILTER="$1"; shift
+
 declare -r VERSION=1.1
 declare -r VERSION_DESCR=prerelease
 declare DATE=date
@@ -91,12 +93,10 @@ END
 }
 
 main () {
-    local -r arg="$1"; shift
-
     check_dependencies
     setup
 
-    case $arg in
+    case $ARG in
         --test)
             LOG_VERBOSE=yes
             assert::shellcheck
@@ -140,5 +140,5 @@ main () {
     return 0
 }
 
-main "$ARG"
+main
 exit $?