* A command `--list-generations' to show all generations for a

profile.
This commit is contained in:
Eelco Dolstra 2004-02-06 16:03:27 +00:00
parent 7c0fa4474f
commit 73ab2ed4fd
3 changed files with 80 additions and 9 deletions

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@ -1,5 +1,3 @@
#include <cerrno>
#include "profiles.hh" #include "profiles.hh"
#include "names.hh" #include "names.hh"
#include "globals.hh" #include "globals.hh"
@ -9,6 +7,9 @@
#include "eval.hh" #include "eval.hh"
#include "help.txt.hh" #include "help.txt.hh"
#include <cerrno>
#include <ctime>
struct Globals struct Globals
{ {
@ -460,9 +461,9 @@ static void opSwitchProfile(Globals & globals,
Strings opFlags, Strings opArgs) Strings opFlags, Strings opArgs)
{ {
if (opFlags.size() > 0) if (opFlags.size() > 0)
throw UsageError(format("unknown flags `%1%'") % opFlags.front()); throw UsageError(format("unknown flag `%1%'") % opFlags.front());
if (opArgs.size() != 1) if (opArgs.size() != 1)
throw UsageError(format("`--profile' takes exactly one argument")); throw UsageError(format("exactly one argument expected"));
Path profile = opArgs.front(); Path profile = opArgs.front();
Path profileLink = getHomeDir() + "/.nix-profile"; Path profileLink = getHomeDir() + "/.nix-profile";
@ -471,13 +472,34 @@ static void opSwitchProfile(Globals & globals,
} }
static void opListGenerations(Globals & globals,
Strings opFlags, Strings opArgs)
{
if (opFlags.size() > 0)
throw UsageError(format("unknown flag `%1%'") % opFlags.front());
if (opArgs.size() != 0)
throw UsageError(format("no arguments expected"));
Generations gens = findGenerations(globals.profile);
for (Generations::iterator i = gens.begin(); i != gens.end(); ++i) {
tm t;
if (!localtime_r(&i->creationTime, &t)) throw Error("cannot convert time");
cout << format("%|4| %|4|-%|02|-%|02| %|02|:%|02|:%|02|\n")
% i->number
% (t.tm_year + 1900) % (t.tm_mon + 1) % t.tm_mday
% t.tm_hour % t.tm_min % t.tm_sec;
}
}
static void opDefaultExpr(Globals & globals, static void opDefaultExpr(Globals & globals,
Strings opFlags, Strings opArgs) Strings opFlags, Strings opArgs)
{ {
if (opFlags.size() > 0) if (opFlags.size() > 0)
throw UsageError(format("unknown flags `%1%'") % opFlags.front()); throw UsageError(format("unknown flags `%1%'") % opFlags.front());
if (opArgs.size() != 1) if (opArgs.size() != 1)
throw UsageError(format("`--import' takes exactly one argument")); throw UsageError(format("exactly one argument expected"));
Path defNixExpr = absPath(opArgs.front()); Path defNixExpr = absPath(opArgs.front());
Path defNixExprLink = getDefNixExprPath(); Path defNixExprLink = getDefNixExprPath();
@ -526,6 +548,8 @@ void run(Strings args)
} }
else if (arg == "--switch-profile" || arg == "-S") else if (arg == "--switch-profile" || arg == "-S")
op = opSwitchProfile; op = opSwitchProfile;
else if (arg == "--list-generations")
op = opListGenerations;
else if (arg[0] == '-') else if (arg[0] == '-')
opFlags.push_back(arg); opFlags.push_back(arg);
else else

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@ -1,13 +1,23 @@
#include "profiles.hh" #include "profiles.hh"
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
Path createGeneration(Path profile, Path outPath, Path drvPath)
static bool cmpGensByNumber(const Generation & a, const Generation & b)
{ {
return a.number < b.number;
}
Generations findGenerations(Path profile)
{
Generations gens;
Path profileDir = dirOf(profile); Path profileDir = dirOf(profile);
string profileName = baseNameOf(profile); string profileName = baseNameOf(profile);
unsigned int num = 0;
Strings names = readDirectory(profileDir); Strings names = readDirectory(profileDir);
for (Strings::iterator i = names.begin(); i != names.end(); ++i) { for (Strings::iterator i = names.begin(); i != names.end(); ++i) {
if (string(*i, 0, profileName.size() + 1) != profileName + "-") continue; if (string(*i, 0, profileName.size() + 1) != profileName + "-") continue;
@ -16,9 +26,32 @@ Path createGeneration(Path profile, Path outPath, Path drvPath)
if (p == string::npos) continue; if (p == string::npos) continue;
istringstream str(string(s, 0, p)); istringstream str(string(s, 0, p));
unsigned int n; unsigned int n;
if (str >> n && str.eof() && n >= num) num = n + 1; if (str >> n && str.eof()) {
Generation gen;
gen.path = profileDir + "/" + *i;
gen.number = n;
struct stat st;
if (lstat(gen.path.c_str(), &st) != 0)
throw SysError(format("statting `%1%'") % gen.path);
gen.creationTime = st.st_mtime;
gens.push_back(gen);
}
} }
gens.sort(cmpGensByNumber);
return gens;
}
Path createGeneration(Path profile, Path outPath, Path drvPath)
{
/* The new generation number should be higher than old the
previous ones. */
Generations gens = findGenerations(profile);
unsigned int num = gens.size() > 0 ? gens.front().number : 0;
/* Create the new generation. */
Path generation, gcrootSrc; Path generation, gcrootSrc;
while (1) { while (1) {

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@ -6,6 +6,20 @@
#include "util.hh" #include "util.hh"
struct Generation
{
int number;
Path path;
time_t creationTime;
};
typedef list<Generation> Generations;
/* Returns the list of currently present generations for the specified
profile, sorted by generation number. */
Generations findGenerations(Path profile);
Path createGeneration(Path profile, Path outPath, Path drvPath); Path createGeneration(Path profile, Path outPath, Path drvPath);
void switchLink(Path link, Path target); void switchLink(Path link, Path target);