fix: avoid the arg list too long error in bash environments

Author: blaggacao

run/_build.sh

@@ -25,7 +25,11 @@ function calc_uncached() {
 
   echo "::debug::uncached paths: ${uncached[*]}"
 
-  echo "uncached=${uncached[*]}" >>"$GITHUB_OUTPUT"
+  echo "${uncached[*]}" > "$UNCACHED_FILE"
+
+  if [[ -n ${uncached[*]} ]]; then
+    echo "has_uncached=true" >>"$GITHUB_OUTPUT"
+  fi
 }
 
 #shellcheck disable=SC2068

run/_cache.sh

@@ -7,8 +7,6 @@ function upload() {
 
   echo "::debug::Running $(basename $BASH_SOURCE):upload()"
 
-  echo "::debug::uploading$UNCACHED"
-
   if [[ -n $NIX_KEY_PATH && $CACHE =~ ^s3:// ]]; then
     if [[ $CACHE =~ \? ]]; then
       CACHE="$CACHE&secret-key=$NIX_KEY_PATH"
@@ -17,7 +15,7 @@ function upload() {
     fi
   fi
 
-  echo "$UNCACHED" | xargs -- nix copy --from "$BUILDER" --to "$CACHE"
+  cat "$UNCACHED_FILE" | xargs -- nix copy --from "$BUILDER" --to "$CACHE"
 }
 
 echo "::group::🌲 Recycle work into cache ..."

run/_run.sh

@@ -14,7 +14,7 @@ function run() {
 
   echo "::group::🏍️️ $action //$cell/$block/$target"
 
-  if [[ -z $BUILT ]]; then
+  if [[ -z $(head "$UNCACHED_FILE") ]]; then
     # should be fetched, since we have already checked cache status in build step
     nix-build "$drv" --no-out-link
   elif [[ $BUILDER != auto ]]; then

run/action.yaml

@@ -106,13 +106,14 @@ runs:
         JSON: ${{ inputs.discovery_json }}
         OS: ${{ runner.os }}
         SCRIPT: ${{ github.action_path }}/_build.sh
+        UNCACHED_FILE: ${{ runner.temp }}/uncached
       run: ${{ github.action_path }}/build.sh
       shell: bash
 
     - name: ${{ fromJSON(inputs.discovery_json).action }} ${{ fromJSON(inputs.discovery_json).name }}
       if: fromJSON(inputs.discovery_json).action != 'build'
       env:
-        BUILT: ${{ steps.build.outputs.uncached }}
+        UNCACHED_FILE: ${{ runner.temp }}/uncached
         BUILDER: ${{ inputs.builder_host }}
         JSON: ${{ inputs.discovery_json }}
         PRJ_ROOT: ${{ github.workspace }}
@@ -126,9 +127,9 @@ runs:
       env:
         CACHE: ${{ inputs.nix_cache }}
         BUILDER: ${{ inputs.builder_host }}
-        UNCACHED: ${{ steps.build.outputs.uncached }}
+        UNCACHED_FILE: ${{ runner.temp }}/uncached
         OS: ${{ runner.os }}
         SCRIPT: ${{ github.action_path }}/_cache.sh
-      if: always() && env.CACHE != 'auto' && env.UNCACHED != '' && steps.build.conclusion == 'success'
+      if: always() && env.CACHE != 'auto' && steps.build.outputs.uncached == 'true' && steps.build.conclusion == 'success'
       run: ${{ github.action_path }}/cache.sh
       shell: bash