mirror of https://github.com/mikefarah/yq.git
36 lines
784 B
Markdown
36 lines
784 B
Markdown
File operators are most often used with merge when needing to merge specific files together. Note that when doing this, you will need to use `eval-all` to ensure all yaml documents are loaded into memory before performing the merge (as opposed to `eval` which runs the expression once per document).
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## Merging files
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Note the use of eval-all to ensure all documents are loaded into memory.
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```bash
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yq eval-all 'select(fileIndex == 0) * select(filename == "file2.yaml")' file1.yaml file2.yaml
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```
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## Get filename
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Given a sample.yml file of:
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```yaml
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a: cat
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```
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then
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```bash
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yq eval 'filename' sample.yml
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```
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will output
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```yaml
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sample.yaml
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```
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## Get file index
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Given a sample.yml file of:
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```yaml
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a: cat
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```
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then
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```bash
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yq eval 'fileIndex' sample.yml
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```
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will output
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```yaml
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0
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```
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