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* `nix-env -qa --description' shows human-readable descriptions of

Browse source 
packages (provided that they have a `meta.description' attribute).
  E.g.,

  $ ./src/nix-env/nix-env -qa --description gcc
  gcc-4.0.2   GNU Compiler Collection, 4.0.x (cross-compiler for sparc-linux)
  gcc-4.0.2   GNU Compiler Collection, 4.0.x (cross-compiler for mips-linux)
  gcc-4.0.2   GNU Compiler Collection, 4.0.x (cross-compiler for arm-linux)
  gcc-4.0.2   GNU Compiler Collection, 4.0.x
This commit is contained in:
Eelco Dolstra 2006-03-10 16:20:42 +00:00
parent a33fb2d287
commit 37d1b1cafd
7 changed files with 79 additions and 25 deletions
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7
src/nix-env/main.cc
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@ -699,6 +699,7 @@ static void opQuery(Globals & globals,
bool printSystem = false;
bool printDrvPath = false;
bool printOutPath = false;
bool printDescription = false;
bool compareVersions = false;
enum { sInstalled, sAvailable } source = sInstalled;
@ -710,6 +711,7 @@ static void opQuery(Globals & globals,
if (*i == "--status" || *i == "-s") printStatus = true;
else if (*i == "--no-name") printName = false;
else if (*i == "--system") printSystem = true;
else if (*i == "--description") printDescription = true;
else if (*i == "--compare-versions" || *i == "-c") compareVersions = true;
else if (*i == "--drv-path") printDrvPath = true;
else if (*i == "--out-path") printOutPath = true;
@ -808,6 +810,11 @@ static void opQuery(Globals & globals,
? "-" : i->queryDrvPath(globals.state));
if (printOutPath) columns.push_back(i->queryOutPath(globals.state));
if (printDescription) {
MetaInfo meta = i->queryMetaInfo(globals.state);
columns.push_back(meta["description"]);
}
table.push_back(columns);
}