Attachments of generated report are duplicated for each plugin

[valerii-lukomskyi]

First of all, sorry for filing this as an issue: allure-framework/allure3#545. Found these Discussions later after I've logged an issue.
I've noticed that allure report with multiple awesome plugins in config duplicates the attachments for each plugin. Is this expected behavior? Or is it possible bug?

Here are the detailed STR:

Describe the bug
Test results attachments are duplicated across multiple plugins which increases the size of the report.
2 plugins in config = x2 disk space usage, 4 plugins = x4 and so on.

To Reproduce
Steps to reproduce the behavior:

1. Configure allurerc with 2 awesome plugins:

reports: './store/reports',
history: './store/history.jsonl',
knownIssues: './store/known-issues.json',
plugins: {
  report1: {
    import: '@allurereport/plugin-awesome',
    options: {
      singleFile: false,
      reportLanguage: "en",
      reportName: "Report 1",
      groupBy: ["epic", "feature", "story"],
      filter: ({ labels }) => labels.find(({ name, value }) => name === "epic" && value === "Epic1")
    }
  },
  report2: {
    import: '@allurereport/plugin-awesome',
    options: {
      singleFile: false,
      reportLanguage: "en",
      reportName: "Report 2",
      groupBy: ["epic", "feature", "story"],
      filter: ({ labels }) => labels.find(({ name, value }) => name === "epic" && value === "Epic2")
    }
  }
}

2. Run tests to generate test-results
3. Generate allure report with command: allure generate store/allure-results
4. Check the test results for each report: report1: ~60 tests, report2: 2 tests.
5. Check the disk space usage of created reports:

➜  reports du -sh */ 2>/dev/null | sort -hr
220M	report1/
219M	report2

Each report has similar structure:
./store/reports/report1/data/attachments
./store/reports/report2/data/attachments

And the main disk space usage comes from these attachments folder, which I've figured out stores the same files.

Expected behavior
As I guess it's supposed to use shared attachments folders across all plugins.

Additional context
Here are the script I've run to compare data of 2 folders:

A="report1/data/attachments"
B="report2/data/attachments"

countA=$(ls "$A" | wc -l)
countB=$(ls "$B" | wc -l)
echo "Files in report1: $countA"
echo "Files in report2:        $countB"

# Find common filenames
comm -12 <(ls "$A" | sort) <(ls "$B" | sort) | wc -l | xargs echo "Common filenames:"

# Of the common files, check how many are identical (by md5)
identical=0
differ=0
while IFS= read -r f; do
  md5a=$(md5 -q "$A/$f")
  md5b=$(md5 -q "$B/$f")
  if [ "$md5a" = "$md5b" ]; then
    ((identical++))
  else
    ((differ++))
  fi
done < <(comm -12 <(ls "$A" | sort) <(ls "$B" | sort))

echo "Identical files:  $identical"
echo "Different files:   $differ"

# Files only in one folder
onlyA=$(comm -23 <(ls "$A" | sort) <(ls "$B" | sort) | wc -l | xargs)
onlyB=$(comm -13 <(ls "$A" | sort) <(ls "$B" | sort) | wc -l | xargs)
echo "Only in report1: $onlyA"
echo "Only in report2:        $onlyB"

# Size of shared identical files
du -sh "$A" "$B" (using tool: shell)

And here are the output:

| Metric | Count |
|---|---|
| Files in report1 | 271 |
| Files in report2 | 270 |
| Common filenames | 270 |
| Identical (same md5) | 270 |
| Different content | 0 |
| Only in report1 | 1 |
| Only in report2 | 0 |