Update README.md, mention new --source argument
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README.md
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README.md
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@ -6,11 +6,12 @@ file, mirroring its remote images, stylesheets, and other resources.
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## Usage
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## Usage
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```
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```
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usage: mirror-img [-h] [-d DIR] [-b BASE] HTML_FILE
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usage: mirror-img [-h] [-d DIR] [-b BASE] [-s URL] HTML_FILE
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mirror-img [-h] [-d DIR] [-b BASE]
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mirror-img [-h] [-d DIR] [-b BASE] [-s URL]
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Available options:
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Available options:
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-h, --help print this help text.
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-h, --help print this help text.
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-b, --base path to mirror directory used in URLs
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-b, --base ARG path to mirror directory used in URLs
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-s, --source ARG URL used to resolve & mirror relative URLs
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-d, --downloads ARG directory for all mirrored files
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-d, --downloads ARG directory for all mirrored files
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```
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```
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@ -21,12 +22,28 @@ In order to mirror a webpage, you can simply download it and pipe it into mirror
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$ curl https://www.gnu.org/philosophy/philosophy.html | mirror-img > philosophy.html
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$ curl https://www.gnu.org/philosophy/philosophy.html | mirror-img > philosophy.html
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```
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```
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And now `philosophy.html` will be a fully-local HTML file, with no external resources!
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And now `philosophy.html` is a fully-local HTML file with no external resources!
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All mirrored content will be found in the `mirror/` directory, and all links
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have been adjusted accordingly.
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… at least, it *would* be. Notice how some resources, like the CSS, don’t load.
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This is because they are defined as *relative* links (e.g., “../style.css”
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rather than “https://invalid.tld/style.css”). In order for these to be
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mirrored as well, mirror-img needs to somehow know the source URL.
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You can use the `--source` argument to provide the source URL, so
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relatively-linked resources can be mirrored, too:
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```
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$ SOURCE_URL="https://www.gnu.org/philosophy/philosophy.html"
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$ curl "$SOURCE_URL" | mirror-img --source "$SOURCE_URL" > philosophy.html
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```
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*Now* we’re done! All mirrored content will be found in the `mirror/`
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directory, and all links have been adjusted accordingly.
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---
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If you’d like to change the download directory, you can use the `--downloads`
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If you’d like to change the download directory, you can use the `--downloads`
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argument. To change the directory used in the output HTML’s URLs, you can
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argument. To change the directory used in the output-HTML’s URLs, you can
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use `--base`.
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use `--base`.
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For example, if you’d like to mirror files into `/tmp/mirrors/` but have URLs
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For example, if you’d like to mirror files into `/tmp/mirrors/` but have URLs
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