Editing 1654: Universal Install Script
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===Title text=== | ===Title text=== | ||
| β | The title text mentions the possibility that the same program may be in multiple repositories. In this case, the script may download and install several different versions of the same software. This would likely only create a confusing install-base, as an operating system would tend to prefer to use one version over another regardless of which one functions. It is unlikely that different repositories include the same software, with the exception of pip/easy_install and the two forms of apt-get, which would each likely see the software is already installed and abort. A way to fix this would be to use if statements. An example of | + | The title text mentions the possibility that the same program may be in multiple repositories. In this case, the script may download and install several different versions of the same software. This would likely only create a confusing install-base, as an operating system would tend to prefer to use one version over another regardless of which one functions. It is unlikely that different repositories include the same software, with the exception of pip/easy_install and the two forms of apt-get, which would each likely see the software is already installed and abort. A way to fix this would be to use if statements. An example of is [https://install.oddcell.ca/ here]. |
The title text also mentions that adding a way of automatically saying "yes" to questions asked during the different repository-fetching programs' running, by making them read input from another program that writes a (nearly) endless stream of "y"s, could simplify things further. This would not work for any {{w|curses (programming library)|curses}}-based menus, or to answer any more complicated questions. Adding <code>2>/dev/null</code> to a command redirects the second output stream (the "error stream") to the null device driver, which discards all writes to it, meaning errors (the package not existing) will not be sent to the screen. | The title text also mentions that adding a way of automatically saying "yes" to questions asked during the different repository-fetching programs' running, by making them read input from another program that writes a (nearly) endless stream of "y"s, could simplify things further. This would not work for any {{w|curses (programming library)|curses}}-based menus, or to answer any more complicated questions. Adding <code>2>/dev/null</code> to a command redirects the second output stream (the "error stream") to the null device driver, which discards all writes to it, meaning errors (the package not existing) will not be sent to the screen. | ||
