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Write/Update
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mikefarah/yaml
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Write/Update
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Write/Update
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Updating multiple values with a script
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Adding new fields
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Updating files in-place
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Updating multiple values with a script
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Values starting with a hyphen (or dash)
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< h1 > Write/Update< / h1 >
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< pre > < code > yaml w < yaml_file|json_file> < path> < new value>
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< / code > < / pre >
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< p > This command can take a json file as input too, and will output yaml unless specified to export as json (-j)< / p >
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< h3 id = "to-stdout" > To Stdout< a class = "headerlink" href = "#to-stdout" title = "Permanent link" > ¶ < / a > < / h3 >
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< p > Given a sample.yaml file of:< / p >
< pre > < code class = "yaml" > b:
c: 2
< / code > < / pre >
< p > then< / p >
< pre > < code class = "bash" > yaml w sample.yaml b.c cat
< / code > < / pre >
< p > will output:< / p >
< pre > < code class = "yaml" > b:
c: cat
< / code > < / pre >
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< h3 id = "from-stdin" > From STDIN< a class = "headerlink" href = "#from-stdin" title = "Permanent link" > ¶ < / a > < / h3 >
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< pre > < code class = "bash" > cat sample.yaml | yaml w - b.c blah
< / code > < / pre >
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< h3 id = "adding-new-fields" > Adding new fields< a class = "headerlink" href = "#adding-new-fields" title = "Permanent link" > ¶ < / a > < / h3 >
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< p > Any missing fields in the path will be created on the fly.< / p >
< p > Given a sample.yaml file of:< / p >
< pre > < code class = "yaml" > b:
c: 2
< / code > < / pre >
< p > then< / p >
< pre > < code class = "bash" > yaml w sample.yaml b.d[0] " new thing"
< / code > < / pre >
< p > will output:< / p >
< pre > < code class = "yaml" > b:
c: cat
d:
- new thing
< / code > < / pre >
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< h3 id = "updating-files-in-place" > Updating files in-place< a class = "headerlink" href = "#updating-files-in-place" title = "Permanent link" > ¶ < / a > < / h3 >
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< p > Given a sample.yaml file of:< / p >
< pre > < code class = "yaml" > b:
c: 2
< / code > < / pre >
< p > then< / p >
< pre > < code class = "bash" > yaml w -i sample.yaml b.c cat
< / code > < / pre >
< p > will update the sample.yaml file so that the value of 'c' is cat.< / p >
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< h3 id = "updating-multiple-values-with-a-script" > Updating multiple values with a script< a class = "headerlink" href = "#updating-multiple-values-with-a-script" title = "Permanent link" > ¶ < / a > < / h3 >
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< p > Given a sample.yaml file of:< / p >
< pre > < code class = "yaml" > b:
c: 2
e:
- name: Billy Bob
< / code > < / pre >
< p > and a script update_instructions.yaml of:< / p >
< pre > < code class = "yaml" > b.c: 3
b.e[0].name: Howdy Partner
< / code > < / pre >
< p > then< / p >
< pre > < code class = "bash" > yaml w -s update_instructions.yaml sample.yaml
< / code > < / pre >
< p > will output:< / p >
< pre > < code class = "yaml" > b:
c: 3
e:
- name: Howdy Partner
< / code > < / pre >
< p > And, of course, you can pipe the instructions in using '-':< / p >
< pre > < code class = "bash" > cat update_instructions.yaml | yaml w -s - sample.yaml
< / code > < / pre >
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< h3 id = "values-starting-with-a-hyphen-or-dash" > Values starting with a hyphen (or dash)< a class = "headerlink" href = "#values-starting-with-a-hyphen-or-dash" title = "Permanent link" > ¶ < / a > < / h3 >
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< p > The flag terminator needs to be used to stop the app from attempting to parse the subsequent arguments as flags:< / p >
< pre > < code > yaml w -- my.path -3
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< / code > < / pre >
< p > will output< / p >
< pre > < code class = "yaml" > my:
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path: -3
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< / code > < / pre >
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