Popularity-Boost for the POSIX-Shell in the Era of Containerized Computing?


 
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Old 01-04-2019
Popularity-Boost for the POSIX-Shell in the Era of Containerized Computing?

Not even thinking that POSIX-Shell is deprecated, but I like working with bash very much, because of it's increased comfort and advanced functions. And in my world here it's available everywhere as default.

Working with kubernetes now, it seems there is a paradigm shift in terms of resources. Small is beautiful is one old and new slogan here. Faster to backup, Faster to set up, Less I/O. A popular linux distribution for containers is alpine linux: Default Installed Image size: ~5 MB. Based on busybox and musl.

With kubernetes(or with other container technology) you can use resources far more effectively and that's why small resource footprint gains you really much in terms of how many applications can I run on the cluster?

Want to install bash? Nearly Triples space usage of that whole system. So size really matters...

Debian/Ubuntu docker base images are at 80-120 MB with my final app images(small apps) around 200-400 MB.
 
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BCP(1)							 Boost C++ Libraries Documentation						    BCP(1)

NAME
bcp - extract subsets of Boost SYNOPSIS
bcp --list [options] module-list bcp [options] module-list output-path bcp --report [options] module-list html-file bcp --help DESCRIPTION
Copies all the files, including dependencies, found in module-list to output-path. output-path must be an existing path. With --list, prints the list of all the files in module-list, including dependencies. With --report, writes the HTML report to html-file. With --help, prints a quick usage reminder. It is useful for Boost authors who want to distribute their library separately from Boost and for Boost users who want to distribute a sub- set of Boost with their application. module-list When the --scan option is not used, a list of Boost files or library names to copy. It can be: - The name of a tool: for example "build" will find "tools/build". - The name of a library: for example "regex". - The title of a header: for example "scoped_ptr" will find "boost/scoped_ptr.hpp". - The name of a header: for example "scoped_ptr.hpp" will find "boost/scoped_ptr.hpp". - The name of a file: for example "boost/regex.hpp". When the --scan option is used, a list of (probably non-boost) files to scan for Boost dependencies, the files in the module list are not therefore copied/listed. File dependencies C++ source files are scanned for #includes, all #includes present in the Boost source tree will then be scanned for their dependencies and so on. C++ source files are associated with the name of a library, if that library has source code (and possibly build data), then include that source in the dependencies. C++ source files are checked for dependencies on Boost.Test (for example to see if they use cpp_main as an entry point). HTML files are scanned for immediate dependencies (images and style sheets, but not links). HTML report contains: - all the licenses in effect, plus the files using each license, and the copyright holders using each license - any files with no recognizable license (please report these to the Boost mailing lists) - any files with no recognizable copyright holders (please report these to the Boost mailing lists) - all the copyright holders and the files on which they hold copyright - file dependency information - indicates the reason for the inclusion of any particular file in the dependencies found OPTIONS
--boost=path sets the location of the Boost tree to path --scan treat the module list as a list of (possibly non-boost) files to scan for Boost dependencies --cvs only copy files under CVS version control --unix-lines make sure that all copied files use Unix style line endings EXAMPLES
bcp scoped_ptr /foo Copies boost/scoped_ptr.hpp and dependencies to /foo. bcp boost/regex.hpp /foo Copies boost/regex.hpp and all dependencies including the regex source code (in libs/regex/src) and build files (in libs/regex/build) to /foo. Does not copy the regex documentation, test or example code. bcp regex /foo Copies the full regex lib (in libs/regex) including dependencies (such as the Boost.Test source required by the regex test programs) to /foo. bcp regex config build /foo Copies the full regex lib (in libs/regex) plus the config lib (libs/config) and the build system (tools/build) to /foo including all the dependencies. bcp --scan --boost=/boost foo.cpp bar.cpp boost Scans the [non-boost] files foo.cpp and bar.cpp for Boost dependencies and copies those dependencies to the sub-directory boost. bcp --report regex.hpp boost-regex-report.html Creates a HTML report called boost-regex-report.html for the Boost module regex.hpp. AUTHORS
Author of bcp is John Maddock. Author of this manpage is Domenico Andreoli, who copied stuff from bcp --help and the HTML documentation. Boost C++ Libraries March 2006 BCP(1)