Changes to `build` for `README.md` updates

* Make the number of packages in the project easier to find.
* Replace `ed` with `awk` in `update_readme()`, the latter being (_arguably_!) more readable/less fragile.

2 files changed, 23 insertions, 11 deletions

diff --git a/README.md b/README.md
index 7db8c0d3..e620b91f 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ A collection of language packs for Vim.
 > One to rule them all, one to find them, one to bring them all and in the darkness bind them.
 
 - It **won't affect your startup time**, as scripts are loaded only on demand\*.
-- It **installs and updates 100+ times faster** than 100+ packages it consists of.
+- It **installs and updates 100+ times faster** than the <!--Package Count-->114<!--/Package Count--> packages it consists of.
 - Solid syntax and indentation support (other features skipped). Only the best language packs.
 - All unnecessary files are ignored (like enormous documentation from php support).
 - No support for esoteric languages, only most popular ones (modern too, like `slim`).
@@ -42,6 +42,7 @@ If you need full functionality of any plugin, please use it directly with your p
 
 ## Language packs
 
+<!--Language Packs-->
 - [ansible](https://github.com/pearofducks/ansible-vim) (syntax, indent, ftplugin)
 - [apiblueprint](https://github.com/sheerun/apiblueprint.vim) (syntax)
 - [applescript](https://github.com/mityu/vim-applescript) (syntax, indent)
@@ -156,6 +157,7 @@ If you need full functionality of any plugin, please use it directly with your p
 - [xls](https://github.com/vim-scripts/XSLT-syntax) (syntax)
 - [yaml](https://github.com/stephpy/vim-yaml) (syntax, ftplugin)
 - [yard](https://github.com/sheerun/vim-yardoc) (syntax)
+<!--/Language Packs-->
 
 ## Updating
 
diff --git a/build b/build
index 2668e0ea..381279c3 100755
--- a/build
+++ b/build
@@ -127,17 +127,27 @@ copy_file() {
 }
 
 update_readme() {
-  ed README.md <<- EOF
-/Language packs
-+2kb
-/##
-'b,-2c
-$(echo -n "$OUTPUT" | sort)
-.
-w
-q
-EOF
+  local tf of
+  tf="$(mktemp)"
+  of="$(mktemp)"
+  sort <<<"$OUTPUT" | grep -vxE '[[:space:]]*' > "$of"
 
+  awk 'suppress == 0 {
+      gsub(/<!--Package Count-->[^<]*<!--\/Package Count-->/,
+           "<!--Package Count-->'"$(awk 'END {print NR}' "$of")"'<!--/Package Count-->");
+      print;
+    }
+    /<!--Language Packs-->/ {
+      suppress = 1;
+      while ( ( getline line < "'"$of"'" ) > 0 ) {
+        print line;
+      }
+    }
+    /<!--\/Language Packs-->/ {
+      suppress = 0;
+      print;
+    }' "README.md" >"$tf"
+  mv "$tf" "README.md"
 }
 
 PACKS="