6 files changed, 25 insertions, 6 deletions
diff --git a/packages/assert.source.sh b/packages/assert.source.sh
index c3ad0a6a..5d3a5c5d 100644
--- a/packages/assert.source.sh
+++ b/packages/assert.source.sh
@@ -30,3 +30,18 @@ assert::not_empty () {
 
     log VERBOSE "Result in $callee as expected not empty"
 }
+
+# Unit test for whether a given string matches a regex.
+assert::matches () {
+    local -r name="$1"; shift
+    local -r content="$1"; shift
+    local -r regex="$1"; shift
+    local -r callee=${FUNCNAME[1]}
+
+    if ! $GREP -q -E "$regex" <<< "$content"; then
+        log ERROR "In $callee expected '$name' to match '$regex'"
+        exit 2
+    fi
+
+    log VERBOSE "Matching in $callee as expected"
+}
diff --git a/packages/atomfeed.source.sh b/packages/atomfeed.source.sh
index 6d5a8f47..f17b00fb 100644
--- a/packages/atomfeed.source.sh
+++ b/packages/atomfeed.source.sh
@@ -6,7 +6,7 @@ atomfeed::meta () {
     log VERBOSE "Generating meta info for post $gmi_file_path"
 
     local is_draft=no
-    if grep -E -q '\.draft\.meta$' <<< "$meta_file"; then
+    if $GREP -E -q '\.draft\.meta$' <<< "$meta_file"; then
         is_draft=yes
     fi
 
@@ -75,6 +75,7 @@ ATOMHEADER
     while read -r gmi_file; do
         # Load cached meta information about the post.
         source <(atomfeed::meta "$gemfeed_dir/$gmi_file")
+
         # Get HTML content for the feed
         local content="$(atomfeed::content "$gemfeed_dir/$gmi_file")"
 
diff --git a/packages/gemfeed.source.sh b/packages/gemfeed.source.sh
index 182d6eb0..33ea0c8d 100644
--- a/packages/gemfeed.source.sh
+++ b/packages/gemfeed.source.sh
@@ -4,7 +4,10 @@ gemfeed::get_posts () {
     local -r gmi_pattern='^[0-9]{4}-[0-9]{2}-[0-9]{2}-.*\.gmi$'
     local -r draft_pattern='\.draft\.gmi$'
 
-    ls "$gemfeed_dir" | grep -E "$gmi_pattern" | grep -E -v "$draft_pattern" | sort -r
+    ls "$gemfeed_dir" |
+        $GREP -E "$gmi_pattern" |
+        $GREP -E -v "$draft_pattern" |
+        sort -r
 }
 
 # Add the links from gemfeed/index.gmi to the main index site.
diff --git a/packages/generate.source.sh b/packages/generate.source.sh
index 248fe6c4..83bf69ee 100644
--- a/packages/generate.source.sh
+++ b/packages/generate.source.sh
@@ -15,7 +15,7 @@ generate::make_link () {
         fi
     done < <(echo "$line" | tr ' ' '\n')
 
-    if grep -E -q "$IMAGE_PATTERN" <<< "$link"; then
+    if $GREP -E -q "$IMAGE_PATTERN" <<< "$link"; then
         if [[ "$what" == md ]]; then
             md::make_img "$link" "$descr"
         else
@@ -115,7 +115,7 @@ generate::fromgmi () {
         for format in "$@"; do
             generate::fromgmi_add_docs "$src" "$format"
         done
-    done < <(find "$CONTENT_DIR/gemtext" -type f | grep -E -v '(.gmi|atom.xml|.tmp)$')
+    done < <(find "$CONTENT_DIR/gemtext" -type f | $GREP -E -v '(.gmi|atom.xml|.tmp)$')
 
     log INFO "Added $num_doc_files other documents to each of $*"
 
diff --git a/packages/html.source.sh b/packages/html.source.sh
index cc79e612..5a292f1c 100644
--- a/packages/html.source.sh
+++ b/packages/html.source.sh
@@ -46,7 +46,7 @@ html::make_link () {
     local link="$1"; shift
     local descr="$1"; shift
 
-    grep -F -q '://' <<< "$link" || link=${link/.gmi/.html}
+    $GREP -F -q '://' <<< "$link" || link=${link/.gmi/.html}
     test -z "$descr" && descr="$link"
     echo "<a class=\"textlink\" href=\"$link\">$descr</a><br />"
 }
diff --git a/packages/md.source.sh b/packages/md.source.sh
index 2f85b3c2..957b9cf3 100644
--- a/packages/md.source.sh
+++ b/packages/md.source.sh
@@ -15,7 +15,7 @@ md::make_link () {
     local link="$1"; shift
     local descr="$1"; shift
 
-    grep -F -q '://' <<< "$link" || link=${link/.gmi/.md}
+    $GREP -F -q '://' <<< "$link" || link=${link/.gmi/.md}
     test -z "$descr" && descr="$link"
 
     echo "[$descr]($link)  "