On Wed, Apr 09, 2003 at 12:13:05AM +0200, Jochen Voss wrote: > (1) the dependencies, predependencies, and build-dependencies of a > specific Debian package, Depends, and Pre-Depends fields may be obtained from binary package control file with: 1) dpkg -I <file> 1.1) apt-cache show <package> While Build-Depends and Build-Depends-Indep may be obtained by the .dsc file which is not in the binary package: i don't know if you can get it from any file on the system. > (2) a list of all essential packages, and > > (3) a list of all required packages This two can be extracted from the /var/lib/dpkg/available file. Even Depends and Pre-Depends may be extracted from available file (while Build-Depends and Build-Depends-Indep still not). Perheps, you may be faster reading from grep-available (grep-dctrl package) output, instead of parsing the entire file: 1.2) grep-available -s Package,Depends,Pre-Depends -P <pacakge> 2) grep-available -n -s Package -F Essential yes 3) grep-available -n -s Package -F Priority required (These are all single line fields of the type "Key: value") Or, you may consider to use python-apt api to read the apt packages.bin and srcpackages.bin files: Personally, I found the documentation still messy and I lose the will to use them very quickly. ciao, -- Luca - De Whiskey's - De Vitis | Elegant or ugly code as well aliases: Luca ^De [A-Z][-A-Za-z]*[iy]'?s$ | as fine or rude sentences have Infinite loop: see `Loop, infinite'. | something in common: they Loop, infinite: see `Infinite loop'. | don't depend on the language.
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